DESIGN · BUILD · AUTOMATE
BOULDER SERVICES
ADU / Backyard Cottage in Boulder
Licensed ADU / backyard cottage services for Boulder and Boulder County. Build an income-producing unit in your backyard.
What Boulder requires
Front setback: 25 ft. (k) Boulder Revised Code, Title 9 Land Use Code §9-7-1 (RL-1 dimensional standards, Table 7-1, through Ord. 8599, 2024)
See full local requirements ↓- Full Design Lifecycle
- Construction & Tenant Finish
- Smart Home · A/V · Edge Compute
Build an income-producing unit in your backyard
FREE PLANNING TOOLS
Both tools are free and take a couple of minutes — start in either one.
EVERY PROJECT STARTS WITH DESIGN
Local Service
ADU / Backyard Cottage Services in Boulder, Colorado
Autotelic provides professional ADU / backyard cottage services throughout Boulder and the surrounding Boulder County area. Accessory dwelling unit construction across the Denver metro — detached new builds, garage conversions, and basement conversions compliant with Colorado HB 24-1152. One veteran-owned design-build team runs the full Denver sequence under a single contract: zoning verification and concept design, municipal zoning and building permit reviews, then construction and inspections through certificate of occupancy. Whether you're in Boulder (home to CU Boulder) or nearby communities, our team delivers quality workmanship backed by Colorado licensing and full insurance coverage.
What the code allows
What the code allows in Boulder — RL-1 example
- Front setback
- 25 ft. (k)Boulder Revised Code, Title 9 Land Use Code §9-7-1 (RL-1 dimensional standards, Table 7-1, through Ord. 8599, 2024)
- Side setback
- 5 ft.Boulder Revised Code, Title 9 Land Use Code §9-7-1 (RL-1 dimensional standards, Table 7-1, through Ord. 8599, 2024)
- Rear setback
- 25 ft.Boulder Revised Code, Title 9 Land Use Code §9-7-1 (RL-1 dimensional standards, Table 7-1, through Ord. 8599, 2024)
- Principal building height
- 35 ft.Boulder Revised Code, Title 9 Land Use Code §9-7-1 (RL-1 dimensional standards, Table 7-1, through Ord. 8599, 2024)
- ADU allowed, max size, and max height
- Not in our sourced tables for this municipality — we confirm with the city.
Illustrative only — not a code determination or permit approval. Setbacks and principal height are from the municipal dimensional table; ADU-specific standards are not in our sourced tables for this municipality — run your own address.
A recent build
Backyard ADU in Denver
Denver · 2026
- Status
- Under construction — 2026
- Managed on
- Buildbot — Autotelic’s own PM platform
- Architecture, site plans, and full MEP design completed in-house
- Permits pulled — electric and plumbing rough-ins permitted and underway
- Spray-foam insulation and exterior work in progress
- First project managed end-to-end on Buildbot, Autotelic’s construction-PM platform
A ground-up backyard ADU in Denver — designed, permitted, and now under construction by Autotelic, and the first project managed end-to-end on Buildbot, Autotelic’s own construction-management platform.
The build sequence for a ADU / Backyard Cottage project
This service is a component of How a ADU project works in Boulder.
Permit Thresholds
Boulder permit thresholds
- Exempt work (no permit required, though work must still comply with all applicab
- The complete list is referenced in Boulder Revised Code (B.R.C.) 1981, Title 10, Chapter 5, Section 10-5-2 (Adoption of International Building Code with Modifications, including exemptions in section J).§10-5-2
- Code reference
- Minor drywall repairs (<1 sheet or 32 sq ft).
- Code reference
- One-story accessory sheds (≤120 sq ft, ≤10 ft high, no utilities/electrical/mechanical/plumbing).
- Code reference
- Fences ≤7 ft high.
- Code reference
- Flatwork (private sidewalks, patios, driveways) ≤30 inches above grade, not over a basement/story below, and not part of an accessible route.
- Code reference
- Playground equipment accessory to 1- or 2-family dwellings.
- Code reference
- Prefabricated above-ground swimming pools accessory to 1- or 2-family dwellings (<24 inches deep, ≤5,000 gallons).
- Code reference
- Retaining walls ≤3 ft high (measured from footing bottom to wall top), unless supporting a surcharge or impounding certain flammables.
Codes are amended regularly — verify current requirements with **City of Boulder Planning and Development Services (P&DS; specifically its Building Permits and Inspections section) issues residential building permits for properties within Boulder city limits.
Energy Code
Boulder energy code quick facts
- Code reference
- 2024 City of Boulder Energy Conservation Code (CoBECC), effective December 1, 2024 (based on the 2024 ICC suite of codes with local amendments; all-electric requirements for new construction, additions, and major alterations).
- Code reference
- This applies to the City of Boulder (not unincorporated Boulder County, which follows the 2021 IECC with amendments effective July 1, 2026).
- Code reference
- The code emphasizes performance paths (e.g., ERI/HERS targets) for most projects but retains prescriptive options for smaller additions/remodels (≤1,000 sf for residential).
- Code reference
- Boulder is in Climate Zone 5B.
- Code reference
- Prescriptive requirements align closely with or reference 2024 IECC Table R402.1.2 (and related sections R401–R404, R407–R408) unless locally amended; projects often use performance paths due to stringency.
- Code reference
- Key prescriptive requirements relevant to remodels/additions (from CoBECC/2024 IECC Table R402.1.2 and related sections for CZ 5B; cite the adopting code section or CoBECC equivalent):
- Ceiling/attic insulation
- R-49 minimum (R402.1.2 / CoBECC Chapter 4 RE).
- Wood-frame above-grade walls
- R-20 + R-5 continuous insulation (ci), or R-13 + R-10 ci, or R-20 ci (R402.1.2 / CoBECC Chapter 4 RE).
Codes are amended regularly — verify current requirements with **City of Boulder Planning and Development Services (P&DS; specifically its Building Permits and Inspections section) issues residential building permits for properties within Boulder city limits.
Zoning & Dimensional Standards
Setback & dimensional standards in Boulder
Zone-district dimensional standards for Boulder, quoted verbatim from the Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024). Knowing your lot's district — and its setbacks, height, and coverage limits — is where every feasibility conversation starts.
Asetback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 25' (k) |
| Side Interior Setback (min) | 15' |
| Side Setback Abutting Street (min) | 25' |
| Rear Setback (min) | 25' |
| Building Height (max) | 35' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) A setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
BCsetback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 20' |
| Side Interior Setback (min) | 0' or 12' |
| Side Setback Abutting Street (min) | 15' |
| Rear Setback (min) | 20' |
| Building Height (max) | 35'; 40' (in I-zones) |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) BC setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
BCSsetback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 10' |
| Side Interior Setback (min) | 0' or 12' |
| Side Setback Abutting Street (min) | 10' |
| Rear Setback (min) | 20' |
| Building Height (max) | 35' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) BCS setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
BMSsetback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 0' (k) |
| Side Interior Setback (min) | 0' or 5' |
| Side Setback Abutting Street (min) | 0' for first and second stories 12' for third story and above |
| Rear Setback (min) | 0' |
| Building Height (max) | 38' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) BMS setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
BRsetback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 20' |
| Side Interior Setback (min) | 0' or 12' |
| Side Setback Abutting Street (min) | 15' |
| Rear Setback (min) | 20' |
| Building Height (max) | 35'; 40' (in I-zones) |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) BR setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
BT-1setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 20' |
| Side Interior Setback (min) | 0' or 12' |
| Side Setback Abutting Street (min) | 15' |
| Rear Setback (min) | 20' |
| Building Height (max) | 35'; 40' (in I-zones) |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) BT-1 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
BT-2setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 20' |
| Side Interior Setback (min) | 10' |
| Side Setback Abutting Street (min) | 15' |
| Rear Setback (min) | 25' |
| Building Height (max) | 35'; 40' (in I-zones) |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) BT-2 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
DT-1setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 0' (k) |
| Side Interior Setback (min) | 0' or 12' |
| Side Setback Abutting Street (min) | 0' (k) |
| Rear Setback (min) | 15' |
| Building Height (max) | 38' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) DT-1 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
DT-2setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 0' (k) |
| Side Interior Setback (min) | 0' or 12' |
| Side Setback Abutting Street (min) | 0' (k) |
| Rear Setback (min) | 15' |
| Building Height (max) | 38' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) DT-2 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
DT-3setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 0' (k) |
| Side Interior Setback (min) | 0' or 12' |
| Side Setback Abutting Street (min) | 0' (k) |
| Rear Setback (min) | 15' |
| Building Height (max) | 38' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) DT-3 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
DT-4setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 0' (k) |
| Side Interior Setback (min) | 0' or 12' |
| Side Setback Abutting Street (min) | 0' |
| Rear Setback (min) | 15' |
| Building Height (max) | 38' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) DT-4 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
DT-5setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 0' (k) |
| Side Interior Setback (min) | 0' or 12' |
| Side Setback Abutting Street (min) | 0' (k) |
| Rear Setback (min) | 15' |
| Building Height (max) | 38' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) DT-5 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
IGsetback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 20' |
| Side Interior Setback (min) | 0' or 12' |
| Side Setback Abutting Street (min) | 15' |
| Rear Setback (min) | 20' |
| Building Height (max) | 35'; 40' (in I-zones) |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) IG setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
IMsetback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 20' |
| Side Interior Setback (min) | 0' or 12' |
| Side Setback Abutting Street (min) | 15' |
| Rear Setback (min) | 20' |
| Building Height (max) | 35'; 40' (in I-zones) |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) IM setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
IMSsetback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 0' (k) |
| Side Interior Setback (min) | 0' or 5' |
| Side Setback Abutting Street (min) | 0' |
| Rear Setback (min) | 10' |
| Building Height (max) | 35' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) IMS setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
IS-1setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 20' |
| Side Interior Setback (min) | 0' or 12' |
| Side Setback Abutting Street (min) | 15' |
| Rear Setback (min) | 20' |
| Building Height (max) | 35'; 40' (in I-zones) |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) IS-1 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
IS-2setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 20' |
| Side Interior Setback (min) | 0' or 12' |
| Side Setback Abutting Street (min) | 15' |
| Rear Setback (min) | 20' |
| Building Height (max) | 35'; 40' (in I-zones) |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) IS-2 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
MHsetback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | See section 9-7-13 |
| Side Interior Setback (min) | See section 9-7-13 |
| Rear Setback (min) | See section 9-7-13 |
| Building Height (max) | 35' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) MH setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
MU-1setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 15' |
| Side Interior Setback (min) | 0' or 5' |
| Side Setback Abutting Street (min) | 0' or 5' (b) |
| Rear Setback (min) | 10' |
| Building Height (max) | 35' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) MU-1 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
MU-2setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 0' (k) |
| Side Interior Setback (min) | 0' or 5' |
| Side Setback Abutting Street (min) | 0' |
| Rear Setback (min) | 10' |
| Building Height (max) | 35' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) MU-2 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
MU-3setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 0' (k) |
| Side Interior Setback (min) | 0' or 5' |
| Side Setback Abutting Street (min) | 0' for first and second stories 12' for third story and above |
| Rear Setback (min) | 15' |
| Building Height (max) | 38' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) MU-3 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
MU-4setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 0' (k) |
| Side Interior Setback (min) | 0' or 5' |
| Side Setback Abutting Street (min) | 0' for first and second stories 12' for third story and above |
| Rear Setback (min) | 0' |
| Building Height (max) | 38' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) MU-4 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
Psetback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 25' (k) |
| Side Interior Setback (min) | 10' |
| Side Setback Abutting Street (min) | 12.5' (k) |
| Rear Setback (min) | 25' |
| Building Height (max) | 35' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) P setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
REsetback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 25' (k) |
| Side Interior Setback (min) | 10' |
| Side Setback Abutting Street (min) | 25' |
| Rear Setback (min) | 25' |
| Building Height (max) | 35' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) RE setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
RH-1setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 15' |
| Side Interior Setback (min) | 0' or 3' |
| Side Setback Abutting Street (min) | 1' per 2' of bldg. height, 10' min. (i) |
| Rear Setback (min) | 15' |
| Building Height (max) | 35' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) RH-1 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
RH-2setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 25' (k) |
| Side Interior Setback (min) | 10' |
| Side Setback Abutting Street (min) | 12.5' (k) |
| Rear Setback (min) | 25' |
| Building Height (max) | 35' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) RH-2 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
RH-3setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 10' |
| Side Interior Setback (min) | 1' per 3' of bldg. height, 5' min. (i) |
| Side Setback Abutting Street (min) | 1' per 2' of bldg. height, 10' min. (i) |
| Rear Setback (min) | 15' |
| Building Height (max) | 40' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) RH-3 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
RH-4setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 20' |
| Side Interior Setback (min) | 1' per 2' of bldg. height, 5' min. (i) |
| Side Setback Abutting Street (min) | 1' per 2' of bldg. height, 10' min. (i) |
| Rear Setback (min) | 20' |
| Building Height (max) | 35' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) RH-4 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
RH-5setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 25' (k) |
| Side Interior Setback (min) | 10' |
| Side Setback Abutting Street (min) | 12.5' (k) |
| Rear Setback (min) | 25' |
| Building Height (max) | 35' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) RH-5 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
RH-6setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 15' |
| Side Interior Setback (min) | 0' or 3' |
| Side Setback Abutting Street (min) | 1' per 2' of bldg. height, 10' min. (i) |
| Rear Setback (min) | 15' |
| Building Height (max) | 35' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) RH-6 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
RH-7setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 10' |
| Side Interior Setback (min) | 1' per 3' of bldg. height, 5' min. (i) |
| Side Setback Abutting Street (min) | 1' per 2' of bldg. height, 10' min. (i) |
| Rear Setback (min) | 15' |
| Building Height (max) | 40' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) RH-7 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
RL-1setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 25' (k) |
| Side Interior Setback (min) | 5' |
| Side Setback Abutting Street (min) | 12.5' (k) |
| Rear Setback (min) | 25' |
| Building Height (max) | 35' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) RL-1 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
RL-2setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 20' |
| Side Interior Setback (min) | 1' per 2' of bldg. height, 5' min. (i) |
| Side Setback Abutting Street (min) | 10' |
| Rear Setback (min) | 20' |
| Building Height (max) | 35' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) RL-2 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
RM-1setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 20' |
| Side Interior Setback (min) | 1' per 2' of bldg. height, 5' min. (i) |
| Side Setback Abutting Street (min) | 10' |
| Rear Setback (min) | 20' |
| Building Height (max) | 35' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) RM-1 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
RM-2setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 25' (k) |
| Side Interior Setback (min) | 5' |
| Side Setback Abutting Street (min) | 12.5' (k) |
| Rear Setback (min) | 25' |
| Building Height (max) | 35' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) RM-2 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
RM-3setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 15' |
| Side Interior Setback (min) | 0' or 3' |
| Side Setback Abutting Street (min) | 1' per 2' of bldg. height, 10' min. (i) |
| Rear Setback (min) | 15' |
| Building Height (max) | 35' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) RM-3 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
RMX-1setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 25' (k) |
| Side Interior Setback (min) | 5' |
| Side Setback Abutting Street (min) | 12.5' (k) |
| Rear Setback (min) | 25' |
| Building Height (max) | 35' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) RMX-1 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
RMX-2setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 15' |
| Side Interior Setback (min) | 0' (attached DUs); 1' per 2' of bldg. height, 5' min. (detached DUs) (i) |
| Side Setback Abutting Street (min) | 0' (attached DUs); 1' per 2' of bldg. height, 5' min. (detached DUs) (i) |
| Rear Setback (min) | 20' |
| Building Height (max) | 35' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) RMX-2 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
RR-1setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 25' (k) |
| Side Interior Setback (min) | 15' |
| Side Setback Abutting Street (min) | 25' |
| Rear Setback (min) | 25' |
| Building Height (max) | 35' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) RR-1 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · View the code
RR-2setback & dimensional standards
| Standard | Requirement |
|---|---|
| Front Setback (min) | 25' (k) |
| Side Interior Setback (min) | 10' |
| Side Setback Abutting Street (min) | 25' |
| Rear Setback (min) | 25' |
| Building Height (max) | 35' |
Boulder Revised Code, Title 9 Land Use Code (through Ord. 8599, 2024) RR-2 setback standards (\u00a79-7-1 Table 7-1 Schedule of Form and Bulk Standards) — effective 2024 · 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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What this covers
Detached or attached accessory dwelling on a Denver lot: foundation or module, envelope, and utility tie-in. Height and massing follow Denver bulk-plane and ADU rules for the zone; confirm with CPD before drawings freeze.
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How the work is coordinated
A municipally licensed Denver general contractor coordinates licensed specialty trades for electrical and plumbing. Denver-metro work is permitted locally. Colorado has no statewide general-contractor license. Cities and counties license general contractors. DORA licenses electrical and plumbing (and similar regulated trades), not general contractors. Autotelic is a municipally licensed Denver general contractor that coordinates licensed specialty trades. Denver building permits run through Community Planning and Development (CPD). Costs are project-specific; no dollar figures.
Service Area
Serving Boulder and Boulder County
We serve Boulder, 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 Boulder project.
FAQ
Common questions
How much does an ADU cost in Denver?
We don't put a single number here on purpose — the honest answer depends on your lot, the utility runs and the finish level. Our Instant Estimate reads the same published tier ranges we quote from and narrows them to your project in about two minutes: https://autotelic.build/estimate?trade=adu-backyard-cottage. It is an estimate, not a quote; after feasibility the build is quoted as a fixed-price proposal, so you know the number before work starts.
Garage conversion or detached backyard cottage?
Each has different zoning, cost, and site implications. We design all three and recommend based on your lot, budget, and how you plan to use the unit.
Should I build for a rental or for family?
The code limits on this page apply to the building no matter who lives in it — what changes is the layout and the specification. Our Premium tier is written as a rental-ready one-bedroom (complete kitchen, laundry, private entrance); family and multigenerational use more often points to a Studio ADU or a lofted Signature plan. Run the lot check for the size you are allowed, then the estimate for the tier price.
What are the drawbacks — permits, timeline, neighbors?
Two municipal reviews run in order: a zoning review confirming the unit fits your district’s standards, then a building permit review of the construction documents, with inspections during the build and a certificate of occupancy at the end. We manage zoning review, the permit application and every inspection through certificate of occupancy.
How It Runs
01
Survey
02
Design
03
Build
04
Verify
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 →Let's design your perfect ADU / Backyard Cottage together
Get a personalized estimate in about 2 minutes — no pressure, no obligation.
How This Works (2 minutes)
- 1Tell us about your project (30 seconds)
- 2Answer a few quick questions for an accurate estimate (60 seconds)
- 3Get your personalized estimate instantly (30 seconds)
No pressure. No obligation. No spam calls. If we're not the right fit, we'll tell you — and even recommend someone who is.
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