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SUPERIOR SERVICES
Second-Story Addition in Superior
Licensed second-story addition services for Superior and Boulder County. Double your living space without moving.
What Superior requires
Code reference: These requirements align with the Town’s adoption of the 2024 International Residential Code (IRC) and related codes (with local amendments) under Chapter 18 of the Superior Municipal Code (see also Sec. 18-1-10 et seq. §18-1-10
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Local Service
Second-Story Addition Services in Superior, Colorado
Autotelic provides professional second-story addition services throughout Superior and the surrounding Boulder 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 Superior (south Boulder County) or nearby communities, our team delivers quality workmanship backed by Colorado licensing and full insurance coverage.
Permit Thresholds
Superior permit thresholds
- Code reference
- A permit is required for all types of remodels including basement finishes, structural repairs, replacement of windows, additions, decks, fences, retaining walls over 4 ft. tall, roof replacements/repairs, insulation installation (with specific guidelines), mechanical equipment (e.g., AC
- Exempt work is not exhaustively listed but implied by the requirements
- e.g., detached accessory structures ≤200 sq. ft. do not require a permit (only those >200 sq. ft. do).
- Code reference
- These requirements align with the Town’s adoption of the 2024 International Residential Code (IRC) and related codes (with local amendments) under Chapter 18 of the Superior Municipal Code (see also Sec. 18-1-10 et seq.§18-1-10
- Code reference
- Specific permit triggers and exemptions follow the adopted codes (typically IRC Section R105 or equivalent) as locally implemented and detailed on the town’s guidance page.§R105
- Plan Review Fee
- 65% of the Building Permit Fee (in addition to the Building Permit Fee).
- Town Use Tax
- 3.775% (2025) of 50% of total project valuation (materials cost assumed to be 50% of total valuation).
- County Use Tax
- 1.335% (2026) of 50% of total project valuation (materials cost assumed to be 50% of total valuation).
Codes are amended regularly — verify current requirements with **The Town of Superior’s Building Department (operated by SAFEbuilt) issues residential building permits.
Zoning & ADU
Superior zoning & ADU quick facts
- Code reference
- R-E, R-VL, R-L, and R-M are the primary single-family residential zone districts in Superior (with ADUs also allowed in Planned Developments and on lots permitting single-unit or two-unit dwellings).
- Code reference
- Key numeric standards (per the Schedule of Requirements in Sec. 16-6-120 of the Superior Municipal Code, as amended by Ordinance O-8 Series 2025; ADU specifics in Sec. 16-6-160):§16-6-120
- Max lot coverage
- R-E: 20%; R-VL: 30%; R-L: 40%; R-M: 40%.
- Max building height (principal structures)
- R-E: 32 ft (2 stories max); R-VL: 32 ft (2 stories max); R-L: 32 ft (2 stories max); R-M: 32 ft (2 stories max).
- Max building height (accessory structures/garages)
- Generally 10 ft (or 32 ft for accessory structures >120 sf or detached garages in applicable cases, per district or Original Town guidance).
- Detached ADUs
- lesser of principal height or 32 ft.
- ADU permitted
- Yes in R-E, R-VL, R-L, R-M (one per single-unit or two-unit dwelling; also in PDs and lots allowing single-/two-unit dwellings).
- ADU max size
- No larger than 50% of the principal dwelling unit’s square footage or 750 sf, whichever is larger (and in no event exceeding the principal unit’s square footage).
Codes are amended regularly — verify current requirements with **The Town of Superior’s Building Department (operated by SAFEbuilt) issues residential building permits.
The build sequence for a Second-Story Addition project
This service is a component of How a Home remodel project works in Superior.
Energy Code
Superior energy code quick facts
- Code reference
- 2024 Metro Cohort Model Code (based on the 2024 IECC), with local amendments/interpretations; Superior is in IECC Climate Zone 5B (Boulder County).
- Code reference
- The Town of Superior has adopted the 2024 International Building/Residential/Mechanical/Plumbing/Fire/Fuel Gas/Existing Building codes and the 2024 Metro Cohort Model Code (based on the 2024 IECC) by reference, with amendments detailed in Chapter 18 of the Superior Municipal Code (adopting ordinance
- Code reference
- The energy code applies to new construction, additions, and alterations (including remodels) per standard IECC scope.
- Code reference
- Key prescriptive requirements relevant to remodels/additions (drawn from Town reminders/interpretations and aligned with the adopted code base for CZ 5B; exact sections may reference the model code or Chapter 18 amendments):
- Wall insulation
- R-25 (listed under Town reminders/interpretations).
- Ceiling/attic insulation
- R-60 for ceilings with attic above (listed under Town reminders/interpretations).
- Windows
- Maximum U-factor 0.30 (listed under Town reminders/interpretations).
- Air leakage
- Dwelling unit air leakage test ≤ 0.16 cfm/sq ft (per IECC R402.4.1.2 testing pathway, referenced in Green Building Program points system).
Codes are amended regularly — verify current requirements with **The Town of Superior’s Building Department (operated by SAFEbuilt) issues residential building permits.
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What a second-story addition covers
A second-story addition in the Denver metro adds habitable floor over an existing house: new floor structure, stairs, roof, windows, and usually electrical, mechanical, and plumbing. The existing foundation and walls have to carry the extra load. A municipally licensed Denver general contractor coordinates the project, design professionals, and licensed specialty trades. Cost is project-specific and depends on structure, roof, and how much of the first floor is opened.
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Structure and zoning height
City and County of Denver Community Planning and Development treats second-story additions as structural review items that exceed IRC prescriptive limits. The residential permitting guide asks for a letter of structural integrity sealed by a design professional who personally inspected the existing foundation and building (DBCA 133.3). Zoning height is measured in feet and stories from the front and rear base planes (Denver Zoning Code Sec. 13.1.2). Plans should show allowed versus proposed height.
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Permits and who coordinates the work
Additions typically need zoning, building, and Sewer Use and Drainage (SUDP) reviews, plus electrical, mechanical, and plumbing when those systems change. Denver Energy Code Chapter 5 [RE] applies to additions. Cities and counties license general contractors. Colorado has no statewide general contractor license. Autotelic acts as a municipally licensed Denver general contractor and coordinates licensed specialty trades plus the design professionals required for the project.
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What buyers should prepare
Target rooms, existing drawings if any, roof and attic photos, and known foundation concerns.
FAQ
Common questions
Do second-story additions need a Denver permit?
Yes. CPD requires building, zoning, and typically SUDP, with structural review because the work exceeds IRC prescriptive limits.
Who handles second-story permits and licensing?
A municipally licensed Denver general contractor coordinates the project, design professionals, and specialty trades. Colorado has no statewide general contractor license.
Can the existing foundation take a second story?
Only after a design professional inspects it. CPD asks for a sealed structural-integrity letter for second-story additions.
How is height measured?
In feet and stories from the zoning front and rear base planes, not just from the sidewalk.
What information helps define scope?
Desired rooms, existing drawings, foundation notes, landmark status, and city or county.
Service Area
Serving Superior and Boulder County
We serve Superior, 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 Superior project.
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 Second-Story Addition together
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