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Second-Story Addition in Denver
Licensed second-story addition services for Denver and Denver County. Double your living space without moving.
- Full Design Lifecycle
- Construction & Tenant Finish
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Local Service
Second-Story Addition Services in Denver, Colorado
Autotelic provides professional second-story addition services throughout Denver and the surrounding Denver County area. Full second-story additions across the Denver metro with structural engineering, framing, roofing, and complete interior build-out. Commercially licensed and insured. Whether you're in Denver (Colorado's capital city) or nearby communities, our team delivers quality workmanship backed by Colorado licensing and full insurance coverage.
Permits & Licensing
Permits in Denver
Building permits in Denver are issued by Community Planning and Development, and contractor licensing here is municipal — a Denver-licensed contractor pulls Denver permits. We handle permit applications and inspections as part of every project. Authority: City and County of Denver — Community Planning and Development.
Permit Thresholds
Denver permit thresholds
- Code reference
- Drywall patching or replacement of one sheet no larger than 4 ft by 8 ft.
- Code/municipal-code references
- Requirements are administered under the Denver Building and Fire Code (2025 edition, effective December 31, 2025, incorporating 2024 I-Codes with local amendments; prior editions referenced similar administrative provisions).
- Code reference
- Exemptions and permit triggers align with administrative sections (e.g., analogous to IBC/IRC Section 105 or city-specific Admin provisions such as those referenced in policy documents like ADMIN 131/138).Section 105
- Code reference
- Demolition has a specific reference (Denver Commercial Building Code Section 130.3 for exempted work).Section 130.3
- There is a tiered schedule (e.g., $1–$500
- $20 permit fee; higher tiers add per-$1,000 amounts with 50% plan review on many ranges); see the full table in the Development Fees policy for exact tiers.
Codes are amended regularly — verify current requirements with City and County of Denver — Community Planning and Development.
Energy Code
Denver energy code quick facts
- Code reference
- 2021 IECC (with local Denver amendments) as adopted in the 2025 Denver Building and Fire Codes / Denver Energy Code (effective December 31, 2025); Denver Green Code (DGC) provisions may also apply to certain commercial/multifamily projects.
- Code reference
- Denver (Climate Zone 5B) follows the 2021 IECC base with amendments incorporated into the Denver Energy Code (DEC; residential provisions start around p.
- Code reference
- 312 of the code document).
- Code reference
- The 2025 adoption explicitly incorporates the 2021 IECC for energy (distinct from the 2024 I-codes used for other building/fire provisions).
- Code reference
- Chapter 5 [RE] / [CE] addresses additions, alterations, repairs, and changes of occupancy to existing buildings.
- Code reference
- The DGC (2022, effective ~May 2023) is largely voluntary but includes mandatory elements for some larger buildings alongside Energize Denver performance standards (primarily for existing large buildings).
- Code reference
- Key prescriptive requirements relevant to remodels/additions (drawn from 2021 IECC Table R402.1.3 / equivalent, applicable via Chapter 5 for new envelope work unless otherwise exempted; Denver-specific checklist references confirm use of these tables or U-factor alternatives):
- Ceiling/attic insulation
- Minimum R-60 (Climate Zone 5).
Codes are amended regularly — verify current requirements with City and County of Denver — Community Planning and Development.
Zoning & Dimensional Standards
Setback & dimensional standards in Denver
Zone-district dimensional standards for Denver, quoted verbatim from the Denver Zoning Code. Knowing your lot's district — and its setbacks, height, and coverage limits — is where every feasibility conversation starts.
E-CC-3setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 0' |
| Side Street Setback (min) | 0' |
| Side Interior Setback (min) | 0' |
Denver Zoning Code E-CC-3 setback standards (4.3, p.37) — effective 2010-06-25 · View the code
E-MS-2setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 7.5' |
| Side Interior Setback (min) | 5' |
Denver Zoning Code E-MS-2 setback standards (4.3, p.33) — effective 2010-06-25 · View the code
E-MS-3setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 7.5' |
| Side Interior Setback (min) | 5' |
Denver Zoning Code E-MS-3 setback standards (4.3, p.33) — effective 2010-06-25 · View the code
E-MS-5setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 7.5' |
| Side Interior Setback (min) | 5' |
Denver Zoning Code E-MS-5 setback standards (4.3, p.33) — effective 2010-06-25 · View the code
E-MU-2.5setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 20' |
| Side Street Setback (min) | 5' |
| Side Interior Setback (min) | 7.5' |
| Rear Setback where no alley (min) | 20' |
| Rear Setback where alley abuts (min) | 12' |
| Building Coverage (max) | 45% |
| Zone Lot Area (min) | 6,000 sf |
| Zone Lot Width (min) | 50' |
| Height in Feet (max) | 30'/30' |
| Height in Stories (max) | 2.5/2.5 |
| Bulk Plane | 10'/10' |
Denver Zoning Code E-MU-2.5 setback standards (4.3, p.19) — effective 2010-06-25 · View the code
E-MX-2setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 7.5' |
| Side Interior Setback (min) | 5' |
Denver Zoning Code E-MX-2 setback standards (4.3, p.33) — effective 2010-06-25 · View the code
E-MX-2Asetback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 7.5' |
| Side Interior Setback (min) | 5' |
Denver Zoning Code E-MX-2A setback standards (4.3, p.33) — effective 2010-06-25 · View the code
E-MX-3setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 7.5' |
| Side Interior Setback (min) | 5' |
Denver Zoning Code E-MX-3 setback standards (4.3, p.33) — effective 2010-06-25 · View the code
E-MX-3Asetback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 7.5' |
| Side Interior Setback (min) | 5' |
Denver Zoning Code E-MX-3A setback standards (4.3, p.33) — effective 2010-06-25 · View the code
E-MX-Esetback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 40% E-MS: 60% |
| Side Street Setback (min) | 25% |
Denver Zoning Code E-MX-E setback standards (4.3, p.39) — effective 2010-06-25 · View the code
E-RH-2.5setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 20' |
| Side Street Setback (min) | 5' |
| Side Interior Setback (min) | 7.5' |
| Rear Setback where no alley (min) | 20' |
| Rear Setback where alley abuts (min) | 12' |
| Building Coverage (max) | 45% |
| Zone Lot Area (min) | 6,000 sf |
| Zone Lot Width (min) | 50' |
| Height in Feet (max) | 30'/30' |
| Height in Stories (max) | 2.5/2.5 |
| Bulk Plane | 10'/10' |
Denver Zoning Code E-RH-2.5 setback standards (4.3, p.19) — effective 2010-06-25 · View the code
E-RX-3setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 7.5' |
| Side Interior Setback (min) | 5' |
Denver Zoning Code E-RX-3 setback standards (4.3, p.33) — effective 2010-06-25 · View the code
E-RX-5setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 7.5' |
| Side Interior Setback (min) | 5' |
Denver Zoning Code E-RX-5 setback standards (4.3, p.33) — effective 2010-06-25 · View the code
E-SU-Asetback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 20' |
| Rear Setback where no alley (min) | 12' 12' 20' 20' 20' |
| Rear Setback where alley abuts (min) | 3' 5' 5' 7.5' 3' 3' min one side/ 10' min com- bined 5' 10' |
| Building Coverage (max) | 45% |
| Zone Lot Area (min) | 3,000 sf |
| Zone Lot Width (min) | 25' |
| Height in Feet (max) | 30'/17' |
| Height in Stories (max) | 2.5/1 |
| Bulk Plane | 17'/10' |
Denver Zoning Code E-SU-A setback standards (4.3, p.21) — effective 2010-06-25 · View the code
E-SU-Bsetback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 20' |
| Rear Setback where no alley (min) | 12' 12' 20' 20' 20' |
| Rear Setback where alley abuts (min) | 3' 5' 5' 7.5' 3' 3' min one side/ 10' min com- bined 5' 10' |
| Zone Lot Area (min) | 4,500 sf |
| Zone Lot Width (min) | 35' |
| Height in Feet (max) | 30'/17' |
| Height in Stories (max) | 2.5/1 |
| Bulk Plane | 17'/10' |
Denver Zoning Code E-SU-B setback standards (4.3, p.21) — effective 2010-06-25 · View the code
E-SU-Dsetback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 20' |
| Side Street Setback (min) | 5' |
| Side Interior Setback (min) | 5' |
| Rear Setback where no alley (min) | 20' |
| Rear Setback where alley abuts (min) | 12' |
| Building Coverage (max) | 45% |
| Zone Lot Area (min) | 6,000 sf |
| Zone Lot Width (min) | 50' |
| Height in Feet (max) | 30'/30' |
| Height in Stories (max) | 2.5/2.5 |
| Bulk Plane | 10'/10' |
Denver Zoning Code E-SU-D setback standards (4.3, p.19) — effective 2010-06-25 · View the code
E-SU-Gsetback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 20' |
| Rear Setback where no alley (min) | 12' 12' 20' 20' 20' |
| Rear Setback where alley abuts (min) | 3' 5' 5' 7.5' 3' 3' min one side/ 10' min com- bined 5' 10' |
| Building Coverage (max) | 45% |
| Zone Lot Area (min) | 9,000 sf |
| Zone Lot Width (min) | 62.5' |
| Height in Feet (max) | 30'/30' |
| Height in Stories (max) | 2.5/2.5 |
| Bulk Plane | 10'/10' |
Denver Zoning Code E-SU-G setback standards (4.3, p.19) — effective 2010-06-25 · View the code
E-TU-Bsetback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 20' |
| Side Street Setback (min) | 3' |
| Side Interior Setback (min) | 3' |
| Rear Setback where no alley (min) | 12' 12' 20' 20' 20' |
| Rear Setback where alley abuts (min) | 3' 5' 5' 7.5' 3' 3' min one side/ 10' min com- bined 5' 10' |
| Building Coverage (max) | 45% |
| Zone Lot Area (min) | 4,500 sf |
| Zone Lot Width (min) | 35' |
| Height in Feet (max) | 30'/17' |
| Height in Stories (max) | 2.5/1 |
| Bulk Plane | 17'/10' |
Denver Zoning Code E-TU-B setback standards (4.3, p.21) — effective 2010-06-25 · View the code
E-TU-Csetback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 20' |
| Side Street Setback (min) | 5' |
| Side Interior Setback (min) | 3' min one side/ 10' min combined |
| Rear Setback where no alley (min) | 12' 12' 20' 20' 20' |
| Rear Setback where alley abuts (min) | 3' 5' 5' 7.5' 3' 3' min one side/ 10' min com- bined 5' 10' |
| Building Coverage (max) | 45% |
| Zone Lot Area (min) | 5,500 sf |
| Zone Lot Width (min) | 50' |
| Height in Feet (max) | 30'/17' |
| Height in Stories (max) | 2.5/1 |
| Bulk Plane | 17'/10' |
Denver Zoning Code E-TU-C setback standards (4.3, p.21) — effective 2010-06-25 · View the code
G-MS-3setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 7.5' |
| Side Interior Setback (min) | 5' |
Denver Zoning Code G-MS-3 setback standards (6.3, p.27) — effective 2010-06-25 · View the code
G-MS-5setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 7.5' |
| Side Interior Setback (min) | 5' |
Denver Zoning Code G-MS-5 setback standards (6.3, p.27) — effective 2010-06-25 · View the code
G-MU-12setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 5' |
| Side Interior Setback (min) | 7.5' |
| Rear Setback where no alley (min) | 20' |
| Rear Setback where alley abuts (min) | 10' |
| Zone Lot Area (min) | 6,000 sf |
| Zone Lot Width (min) | 50' |
Denver Zoning Code G-MU-12 setback standards (6.3, p.29) — effective 2010-06-25 · View the code
G-MU-20setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 5' |
| Side Interior Setback (min) | 7.5' |
| Rear Setback where no alley (min) | 20' |
| Rear Setback where alley abuts (min) | 10' |
| Zone Lot Area (min) | 6,000 sf |
| Zone Lot Width (min) | 50' |
Denver Zoning Code G-MU-20 setback standards (6.3, p.29) — effective 2010-06-25 · View the code
G-MU-3setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 20' |
| Side Street Setback (min) | 5' |
| Side Interior Setback (min) | 3' min one side/10' min combined |
| Rear Setback where no alley (min) | 20' |
| Rear Setback where alley abuts (min) | 12' |
| Building Coverage (max) | 45% |
| Zone Lot Area (min) | 3,000 sf |
| Zone Lot Width (min) | 25' |
Denver Zoning Code G-MU-3 setback standards (6.3, p.17) — effective 2010-06-25 · View the code
G-MU-5setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 20' |
| Side Street Setback (min) | 5' |
| Side Interior Setback (min) | 5' |
| Rear Setback where no alley (min) | 20' |
| Rear Setback where alley abuts (min) | 12' |
| Building Coverage (max) | 45% |
| Zone Lot Area (min) | 3,000 sf |
| Zone Lot Width (min) | 25' |
Denver Zoning Code G-MU-5 setback standards (6.3, p.17) — effective 2010-06-25 · View the code
G-MU-8setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 20' |
| Side Street Setback (min) | 5' |
| Side Interior Setback (min) | 7.5' |
| Rear Setback where no alley (min) | 20' |
| Rear Setback where alley abuts (min) | 12' |
| Building Coverage (max) | 40% |
| Zone Lot Area (min) | 3,000 sf |
| Zone Lot Width (min) | 25' |
Denver Zoning Code G-MU-8 setback standards (6.3, p.17) — effective 2010-06-25 · View the code
G-MX-3setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 7.5' |
| Side Interior Setback (min) | 5' |
Denver Zoning Code G-MX-3 setback standards (6.3, p.27) — effective 2010-06-25 · View the code
G-RH-3setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 20' |
| Side Street Setback (min) | 15' |
| Side Interior Setback (min) | 3' |
| Rear Setback where no alley (min) | 20' |
| Rear Setback where alley abuts (min) | 12' |
| Building Coverage (max) | 60% |
| Zone Lot Area (min) | 3,000 sf |
| Zone Lot Width (min) | 25' |
| Bulk Plane | 12' |
Denver Zoning Code G-RH-3 setback standards (6.3, p.17) — effective 2010-06-25 · View the code
G-RO-3setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 20' |
| Side Street Setback (min) | 5' |
| Side Interior Setback (min) | 3' min one side/10' min combined |
| Rear Setback where no alley (min) | 20' |
| Rear Setback where alley abuts (min) | 12' |
| Building Coverage (max) | 45% |
| Zone Lot Area (min) | 3,000 sf |
| Zone Lot Width (min) | 25' |
Denver Zoning Code G-RO-3 setback standards (6.3, p.17) — effective 2010-06-25 · View the code
G-RO-5setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 20' |
| Side Street Setback (min) | 5' |
| Side Interior Setback (min) | 5' |
| Rear Setback where no alley (min) | 20' |
| Rear Setback where alley abuts (min) | 12' |
| Building Coverage (max) | 45% |
| Zone Lot Area (min) | 3,000 sf |
| Zone Lot Width (min) | 25' |
Denver Zoning Code G-RO-5 setback standards (6.3, p.17) — effective 2010-06-25 · View the code
G-RX-3setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 7.5' |
| Side Interior Setback (min) | 5' |
Denver Zoning Code G-RX-3 setback standards (6.3, p.27) — effective 2010-06-25 · View the code
G-RX-5setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 7.5' |
| Side Interior Setback (min) | 5' |
Denver Zoning Code G-RX-5 setback standards (6.3, p.27) — effective 2010-06-25 · View the code
S-CC-3setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 0' |
| Side Street Setback (min) | 0' |
| Side Interior Setback (min) | 0' |
Denver Zoning Code S-CC-3 setback standards (3.3, p.29) — effective 2010-06-25 · View the code
S-CC-5setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 0' |
| Side Street Setback (min) | 0' |
| Side Interior Setback (min) | 5' |
Denver Zoning Code S-CC-5 setback standards (3.3, p.33) — effective 2010-06-25 · View the code
S-MS-3setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 0' |
| Side Street Setback (min) | 0' |
| Side Interior Setback (min) | 0' |
Denver Zoning Code S-MS-3 setback standards (3.3, p.29) — effective 2010-06-25 · View the code
S-MU-3setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 13.1.5.9 or 20' , whichever |
| Side Street Setback (min) | 5' |
| Side Interior Setback (min) | 5' |
| Rear Setback where no alley (min) | 20' |
| Rear Setback where alley abuts (min) | 12' |
| Building Coverage (max) | 50% |
| Zone Lot Area (min) | 4,500 sf |
| Zone Lot Width (min) | 37.5' |
| Height in Feet (max) | 32'/32' |
| Height in Stories (max) | 3/3 |
Denver Zoning Code S-MU-3 setback standards (3.3, p.21) — effective 2010-06-25 · View the code
S-MX-12setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 20' 20'/25' |
| Side Interior Setback (min) | 35'/40' |
Denver Zoning Code S-MX-12 setback standards (3.3, p.39) — effective 2010-06-25 · View the code
S-MX-12Asetback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 20' 20'/25' |
| Side Interior Setback (min) | 35'/40' |
Denver Zoning Code S-MX-12A setback standards (3.3, p.39) — effective 2010-06-25 · View the code
S-MX-2setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 0' |
| Side Street Setback (min) | 0' |
| Side Interior Setback (min) | 0' |
Denver Zoning Code S-MX-2 setback standards (3.3, p.29) — effective 2010-06-25 · View the code
S-MX-2Asetback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 40% Residential Only Buildings: 30% |
| Side Street Setback (min) | 25% |
| Side Interior Setback (min) | 0' |
Denver Zoning Code S-MX-2A setback standards (3.3, p.37) — effective 2010-06-25 · View the code
S-MX-3setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 0' |
| Side Street Setback (min) | 0' |
| Side Interior Setback (min) | 0' |
Denver Zoning Code S-MX-3 setback standards (3.3, p.31) — effective 2010-06-25 · View the code
S-MX-3Asetback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 15' |
Denver Zoning Code S-MX-3A setback standards (3.3, p.39) — effective 2010-06-25 · View the code
S-MX-5setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 20' |
| Side Interior Setback (min) | 35'/40' |
Denver Zoning Code S-MX-5 setback standards (3.3, p.39) — effective 2010-06-25 · View the code
S-MX-5Asetback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 20' |
| Side Interior Setback (min) | 35'/40' |
Denver Zoning Code S-MX-5A setback standards (3.3, p.39) — effective 2010-06-25 · View the code
S-MX-8Asetback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 20' |
Denver Zoning Code S-MX-8A setback standards (3.3, p.39) — effective 2010-06-25 · View the code
S-RH-2.5setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 5' |
| Side Interior Setback (min) | 5' |
| Rear Setback where no alley (min) | 20' |
| Rear Setback where alley abuts (min) | 12' |
| Building Coverage (max) | 50% |
| Zone Lot Area (min) | 4,500 sf |
| Zone Lot Width (min) | 37.5' |
| Height in Feet (max) | 30'/30' |
| Height in Stories (max) | 2.5/2.5 |
| Bulk Plane | 10'/10' |
Denver Zoning Code S-RH-2.5 setback standards (3.3, p.21) — effective 2010-06-25 · View the code
S-SU-Asetback & dimensional standards
| Standard | Requirement |
|---|---|
| Side Interior Setback (min) | 3' 5' |
| Rear Setback where alley abuts (min) | 12' |
| Building Coverage (max) | 50% |
| Zone Lot Area (min) | 3,000 sf |
| Zone Lot Width (min) | 25' |
| Height in Feet (max) | 30'/30' |
| Height in Stories (max) | 2.5/2.5 |
| Bulk Plane | 10'/10' |
Denver Zoning Code S-SU-A setback standards (3.3, p.19) — effective 2010-06-25 · View the code
S-SU-FAsetback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' 5'/15' |
| Side Interior Setback (min) | 5'/15' |
| Rear Setback where alley abuts (min) | 12' |
| Building Coverage (max) | 50% |
| Zone Lot Area (min) | 8,500 sf |
| Zone Lot Width (min) | 62.5' |
| Height in Feet (max) | 30'/30' |
| Height in Stories (max) | 2.5/2.5 |
| Bulk Plane | 10' |
Denver Zoning Code S-SU-FA setback standards (3.3, p.19) — effective 2010-06-25 · View the code
S-SU-Isetback & dimensional standards
| Standard | Requirement |
|---|---|
| Side Street Setback (min) | 5' |
| Zone Lot Area (min) | 12,000 sf |
| Zone Lot Width (min) | 62.5' |
| Height in Feet (max) | 30'/30' |
| Height in Stories (max) | 3/3 |
| Bulk Plane | 10'/10' 10'/10' |
Denver Zoning Code S-SU-I setback standards (3.3, p.19) — effective 2010-06-25 · View the code
U-MS-2setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 7.5' |
| Side Interior Setback (min) | 5' |
Denver Zoning Code U-MS-2 setback standards (5.3, p.27) — effective 2010-06-25 · View the code
U-MS-3setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 7.5' |
| Side Interior Setback (min) | 5' |
Denver Zoning Code U-MS-3 setback standards (5.3, p.27) — effective 2010-06-25 · View the code
U-MS-5setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 7.5' |
| Side Interior Setback (min) | 5' |
Denver Zoning Code U-MS-5 setback standards (5.3, p.27) — effective 2010-06-25 · View the code
U-MX-2setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 7.5' |
| Side Interior Setback (min) | 5' |
Denver Zoning Code U-MX-2 setback standards (5.3, p.27) — effective 2010-06-25 · View the code
U-MX-3setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 7.5' |
| Side Interior Setback (min) | 5' |
Denver Zoning Code U-MX-3 setback standards (5.3, p.27) — effective 2010-06-25 · View the code
U-RH-2.5setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 7.5' |
| Side Interior Setback (min) | 10' |
| Rear Setback where no alley (min) | 20' |
| Rear Setback where alley abuts (min) | 12' |
| Building Coverage (max) | 40% |
| Zone Lot Area (min) | 3,000 sf |
| Zone Lot Width (min) | 25' |
| Height in Feet (max) | 30'/17' |
| Height in Stories (max) | 2.5/1 |
| Bulk Plane | 17'/10' |
Denver Zoning Code U-RH-2.5 setback standards (5.3, p.19) — effective 2010-06-25 · View the code
U-RH-3Asetback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 7.5' |
| Side Interior Setback (min) | 10' |
| Rear Setback where no alley (min) | 20' |
| Rear Setback where alley abuts (min) | 12' |
| Building Coverage (max) | 40% |
| Zone Lot Area (min) | 3,000 sf |
| Zone Lot Width (min) | 25' |
| Height in Feet (max) | 30'/17' |
| Height in Stories (max) | 2.5/1 |
| Bulk Plane | 17'/10' |
Denver Zoning Code U-RH-3A setback standards (5.3, p.19) — effective 2010-06-25 · View the code
U-RX-3setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 7.5' |
| Side Interior Setback (min) | 5' |
Denver Zoning Code U-RX-3 setback standards (5.3, p.27) — effective 2010-06-25 · View the code
U-RX-5setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 7.5' |
| Side Interior Setback (min) | 5' |
Denver Zoning Code U-RX-5 setback standards (5.3, p.27) — effective 2010-06-25 · View the code
U-SU-Asetback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 3' |
| Side Interior Setback (min) | 3' |
| Rear Setback where no alley (min) | 20' |
| Rear Setback where alley abuts (min) | 12' |
| Building Coverage (max) | 60% |
| Zone Lot Area (min) | 3,000 sf |
| Zone Lot Width (min) | 25' |
| Height in Feet (max) | 30'/17' |
| Height in Stories (max) | 2.5/1 |
| Bulk Plane | 17'/10' |
Denver Zoning Code U-SU-A setback standards (5.3, p.19) — effective 2010-06-25 · View the code
U-SU-A2setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 3' |
| Side Interior Setback (min) | 3' |
| Rear Setback where no alley (min) | 20' |
| Rear Setback where alley abuts (min) | 12' |
| Building Coverage (max) | 60% |
| Zone Lot Area (min) | 3,000 sf |
| Zone Lot Width (min) | 25' |
| Height in Feet (max) | 30'/17' |
| Height in Stories (max) | 2.5/1 |
| Bulk Plane | 17'/10' |
Denver Zoning Code U-SU-A2 setback standards (5.3, p.19) — effective 2010-06-25 · View the code
U-SU-Bsetback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Zone Lot Area (min) | 4,500 sf |
| Zone Lot Width (min) | 35' |
| Height in Feet (max) | 30'/17' |
| Height in Stories (max) | 2.5/1 |
| Bulk Plane | 17'/10' |
Denver Zoning Code U-SU-B setback standards (5.3, p.19) — effective 2010-06-25 · View the code
U-SU-B2setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 3' |
| Side Interior Setback (min) | 3' |
| Rear Setback where no alley (min) | 20' |
| Rear Setback where alley abuts (min) | 12' |
| Building Coverage (max) | 60% |
| Zone Lot Area (min) | 4,500 sf |
| Zone Lot Width (min) | 35' |
| Height in Feet (max) | 30'/17' |
| Height in Stories (max) | 2.5/1 |
| Bulk Plane | 17'/10' |
Denver Zoning Code U-SU-B2 setback standards (5.3, p.19) — effective 2010-06-25 · View the code
U-SU-Csetback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Interior Setback (min) | 3' min one 10' min combined |
| Zone Lot Area (min) | 5,500 sf |
| Zone Lot Width (min) | 50' |
| Height in Feet (max) | 30'/17' |
| Height in Stories (max) | 2.5/1 |
| Bulk Plane | 17'/10' |
Denver Zoning Code U-SU-C setback standards (5.3, p.19) — effective 2010-06-25 · View the code
U-SU-C2setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 3' |
| Side Interior Setback (min) | 3' min one 10' min combined |
| Rear Setback where no alley (min) | 20' |
| Rear Setback where alley abuts (min) | 12' |
| Building Coverage (max) | 60% |
| Zone Lot Area (min) | 5,500 sf |
| Zone Lot Width (min) | 50' |
| Height in Feet (max) | 30'/17' |
| Height in Stories (max) | 2.5/1 |
| Bulk Plane | 17'/10' |
Denver Zoning Code U-SU-C2 setback standards (5.3, p.19) — effective 2010-06-25 · View the code
U-SU-Esetback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 5' |
| Rear Setback where no alley (min) | 20' |
| Rear Setback where alley abuts (min) | 12' |
| Building Coverage (max) | 45% |
| Zone Lot Area (min) | 7,000 sf |
| Zone Lot Width (min) | 50' |
| Height in Feet (max) | 30'/17' |
| Height in Stories (max) | 2.5/1 |
| Bulk Plane | 17'/10' |
Denver Zoning Code U-SU-E setback standards (5.3, p.19) — effective 2010-06-25 · View the code
U-SU-Hsetback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 5' |
| Side Interior Setback (min) | 5' |
| Rear Setback where no alley (min) | 20' |
| Rear Setback where alley abuts (min) | 12' |
| Building Coverage (max) | 45% |
| Zone Lot Area (min) | 10,000 sf |
| Zone Lot Width (min) | 75' |
| Height in Feet (max) | 30'/17' |
| Height in Stories (max) | 3/1 |
| Bulk Plane | 17'/10' |
Denver Zoning Code U-SU-H setback standards (5.3, p.19) — effective 2010-06-25 · View the code
U-TU-Bsetback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 3' |
| Side Interior Setback (min) | 3' |
| Rear Setback where no alley (min) | 20' |
| Rear Setback where alley abuts (min) | 12' |
| Building Coverage (max) | 60% |
| Zone Lot Area (min) | 3,000 sf |
| Zone Lot Width (min) | 25' |
| Height in Feet (max) | 30'/17' |
| Height in Stories (max) | 2.5/1 |
| Bulk Plane | 17'/10' |
Denver Zoning Code U-TU-B setback standards (5.3, p.19) — effective 2010-06-25 · View the code
U-TU-B2setback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 3' |
| Side Interior Setback (min) | 3' |
| Rear Setback where no alley (min) | 20' |
| Rear Setback where alley abuts (min) | 12' |
| Building Coverage (max) | 60% |
| Zone Lot Area (min) | 3,000 sf |
| Zone Lot Width (min) | 25' |
| Height in Feet (max) | 30'/17' |
| Height in Stories (max) | 2.5/1 |
| Bulk Plane | 17'/10' |
Denver Zoning Code U-TU-B2 setback standards (5.3, p.19) — effective 2010-06-25 · View the code
U-TU-Csetback & dimensional standards
| Standard | Requirement |
|---|---|
| Primary Street Setback (min) | 10' |
| Side Street Setback (min) | 5' |
| Side Interior Setback (min) | 10' |
| Rear Setback where no alley (min) | 20' |
| Rear Setback where alley abuts (min) | 12' |
| Building Coverage (max) | 40% |
| Zone Lot Area (min) | 4,500 sf |
| Zone Lot Width (min) | 35' |
| Height in Feet (max) | 30'/17' |
| Height in Stories (max) | 2.5/1 |
| Bulk Plane | 17'/10' |
Denver Zoning Code U-TU-C setback standards (5.3, p.19) — effective 2010-06-25 · View the code
Verify current requirements with the jurisdiction — informational reference only. Standards vary by overlay, lot, and use; we confirm the exact rules for your property during feasibility.
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When a second-story addition makes sense
A second-story addition adds bedrooms, a primary suite, office space, or other living area without expanding the home’s footprint. It is often considered when side-yard setbacks, lot coverage limits, a detached garage, or outdoor living priorities make a rear or side addition less practical. In the Denver metro, many homes on smaller lots or in established neighborhoods face those constraints. Vertical expansion can preserve yard space while increasing finished square footage, but it is a structural project—not a cosmetic remodel. The existing foundation, first-floor walls, floor framing, and roof system all have to support new loads.
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What the work typically includes
Scope varies by home and design, but second-story additions commonly involve: - Structural evaluation of the foundation, bearing walls, and first-floor framing - Temporary protection and weatherproofing while the existing roof is opened or removed - New floor framing, exterior walls, windows, and a new or modified roof - Stairs or stair reconfiguration to reach the new level safely and code-compliantly - Exterior finishes that tie into existing siding, masonry, or stucco - Electrical, plumbing, and HVAC extension into the new space by licensed specialty trades - Insulation, drywall, flooring, and interior finishes - Updated smoke/CO detection and means-of-egress details required for the new sleeping or living areas Some projects build over an existing single-story wing; others raise a portion of the home and rework the roof lines around the addition. Matching floor elevations, stair placement, and exterior proportions early reduces costly redesign later.
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Structural and design checks before you commit
Before drawings are finalized, the existing structure needs a clear assessment. Key questions include whether the foundation and first-floor bearing lines can carry the added dead and live loads, whether posts, beams, or sistered joists are required, and how lateral loads (wind and seismic design categories applicable locally) will be handled in the new wall and roof diaphragm. Denver-metro housing stock ranges from mid-century ranches to newer two-story production homes. Older homes may need more framing reinforcement, foundation work, or selective demolition to create clean bearing paths. Design also has to address head height at stairs and eaves, window placement for light and egress, and how the addition reads from the street so massing does not overwhelm the original house. Energy code requirements affect wall and roof assemblies, window performance, and how the new conditioned space connects to the existing thermal envelope. Those choices should be settled in design, not improvised in the field.
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Living in the home during construction
Second-story work is disruptive. Opening the roof, removing ceiling finishes below bearing lines, and running new stairs often affect the main living level. Dust control, temporary weather barriers, and phased access plans matter as much as the finish schedule. Some households relocate for part of the build; others stay and wall off work zones. Expect periods without normal use of rooms under the addition, intermittent utility shutoffs when trades tie in new systems, and restricted yard or driveway access for material staging. A written phasing plan—what stays occupied, where temporary protection goes, and how the home is dried in—should be part of project planning.
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Permits and coordination in the Denver metro
Second-story additions require building permits and plan review. Submittals typically include architectural and structural drawings, and may include energy compliance documentation and public-tree or zoning clearances depending on the property and scope. Roof structure, stair geometry, egress windows in sleeping rooms, guardrails, and smoke detection are common plan-review focus areas. A municipally licensed Denver general contractor coordinates the project, permit process, inspections, and licensed specialty trades such as electrical, plumbing, and HVAC. Individual trade permits are pulled and inspected under those specialty licenses as required by the city or county. HOA architectural review, if applicable, runs in parallel with municipal permitting and should be started early so exterior materials and height are not reworked after permit drawings are complete.
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Cost factors without a one-size number
Second-story addition cost is project-specific. Major drivers include: - Structural reinforcement needed at the foundation and first floor - Size and complexity of the new level, including roof form and exterior finish matching - Stair location and whether existing halls or rooms must be reconfigured - Extent of work required on the level below for beams, posts, or ceiling repair - Mechanical strategy—extending existing HVAC versus adding capacity or zoning - Window and exterior material choices - Site access, temporary protection, and whether the household will occupy the home during construction - Local permit, design, and engineering requirements Because those variables differ by house, proposals should follow on-site evaluation and schematic design rather than a generic per-square-foot assumption.
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How to prepare as a homeowner
Clear goals help the design team size the addition correctly: who will use the space, whether a full bath is required, storage needs, and whether future resale layout matters as much as immediate use. Gather any existing plans, survey work, prior remodel permits, and HOA guidelines before the first site visit. Also note known issues—settlement cracks, past roof leaks, undersized electrical service, or aging HVAC—that could surface when the structure is opened. Sharing those details early keeps structural and mechanical scope realistic.
FAQ
Common questions
Can my existing foundation support a second story?
Not always without reinforcement. A structural evaluation looks at foundation type and condition, soil bearing assumptions, and how new loads transfer through the first floor. Some homes need added footings, beams, posts, or wall reinforcement; others can accept the load with more limited framing upgrades. That determination belongs in design, before demolition.
Will we need to move out during a second-story addition?
It depends on the roof opening sequence, stair work, and how much of the main level is affected. Some owners stay with temporary barriers and phased work; others relocate during demo, framing, and dry-in. Ask for a phasing and protection plan so occupancy expectations are explicit.
Who handles the trade permits and licensing?
A municipally licensed Denver general contractor coordinates the project and inspections. Licensed specialty trades handle electrical, plumbing, HVAC, and other regulated scopes, including the trade permits those disciplines require.
How long does a second-story addition usually take?
Duration depends on size, structural complexity, weather during roof-open work, permit review time, and finish level. Design and permitting often take a substantial period before construction starts. Construction itself commonly spans several months once work begins; your schedule should be built from the actual drawings and municipal review timeline, not a generic estimate.
Do second-story additions require new stairs?
Most do, unless an existing stair already lands where the new floor can connect cleanly. Stair placement affects hallways, closets, and rooms on the first floor, and the stair must meet current code for rise, run, headroom, and guards. Resolve stair location in schematic design because it drives both structure and daily circulation.
What surprises homeowners most on these projects?
Conditions hidden above ceilings and in bearing walls—older framing, prior undocumented remodels, or limited capacity for new point loads—are common discovery items once the structure is opened. Exterior matching, temporary weather protection, and the amount of first-floor repair under new beams are also easy to underestimate without thorough design.
Service Area
Serving Denver and Denver County
We serve Denver, CO and all surrounding Denver metro communities. Our team is based in Denver and operates throughout the Front Range, from Castle Rock to Longmont and everywhere in between. Contact us for a free estimate on your Denver project.
How It Runs
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DESIGN SERVICES
Discovery & Site Analysis
Needs + preference programming, site survey, as-built documentation, feasibility.
We walk, measure, and photograph your property — existing conditions, utilities, structure, and constraints. You get the as-built documentation and feasibility read that every later decision rests on.
Learn more →Concept Design & Space Planning
Schematic design, floor plan studies, layout options.
Your scope becomes schematic floor plans you can compare side by side — circulation, daylight, adjacencies, and what each option does to the budget. Layout decisions happen on paper, where changes are cheap.
Learn more →Architectural Design & 3D Renderings
Design development, materials + finishes, photorealistic visualization.
The chosen concept resolves into materials, finishes, fixtures, and lighting — with the automation layer drawn in. Photorealistic renderings let you walk the space and adjust before anything is priced.
Learn more →Construction Documents & Permitting
Full CD sets, structural + MEP engineering coordination, permit-ready drawings.
Approved designs become coordinated architectural, structural, and MEP sheets — the set your jurisdiction permits from and trades build from. We submit, track, and answer review comments.
Learn more →CONSTRUCTION
New Construction & Custom Homes
Ground-up homes and light commercial, dirt to keys.
Ground-up residential and light commercial builds — foundations through finishes, including modular and steel construction. One accountable builder from dirt to keys.
Learn more →Remodels & Additions
Kitchens, baths, basements, pop-tops, whole-home.
Kitchens, baths, basements, pop-tops, and whole-home renovations that respect the house you already have. We handle structure, permits, and the dust.
Learn more →Commercial Tenant Finish & Build-Outs
Shells to working spaces — retail, office, restaurant, school.
Raw shells become working spaces — showrooms, offices, restaurants, schools. Dealer-spec finishes, code compliance, and opening dates held.
Learn more →ADUs & Modular Construction
Backyard cottages, garage conversions, factory-built homes.
Backyard cottages, garage conversions, and factory-built homes — zoning, design, permits, and set. Denver’s ADU rules are a specialty, not a surprise.
Learn more →Outdoor Living & Patio Structures
Decks, pergolas, and dining patios built for Colorado weather.
Decks, pergolas, and dining patios engineered for Colorado sun, snow, and hail — structure, shade, and drainage done right the first time.
Learn more →TECHNOLOGY
Smart Home Automation
Lighting, shades, climate, audio, security — one interface.
Whole-home control of lighting, shades, climate, audio, and security from a single interface — Crestron, Lutron, Savant, and Control4 designed in, not bolted on.
Learn more →A/V Systems
Theaters, distributed audio, video walls, commercial sound.
Theaters, distributed audio, video walls, and commercial sound — designed, installed, and tuned by the same team for over 20 years.
Learn more →Control Systems
Custom programming — scenes and schedules that fit the space.
Every subsystem brought into one elegant interface — custom programming for homes and venues, with scenes and schedules that match how the space is actually used.
Learn more →Networking & Edge Compute
Enterprise Wi-Fi, structured cabling, racks, on-prem compute.
Enterprise-grade Wi-Fi, structured cabling, racks, and on-premise compute — the backbone that makes everything else reliable, including our own Barbot platform.
Learn more →Solar & Energy Storage
Solar arrays, Tesla Powerwall, EV charging — certified install.
Solar arrays, Tesla Powerwall, and EV charging designed and installed by a Tesla Energy Certified team — roof, electrical, and app in one scope.
Learn more →TRUSTED TO BUILD FOR
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