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Pop-Top Addition in Commerce City
Licensed pop-top addition services for Commerce City and Adams County. Go up, not out — add a full second story.
- Full Design Lifecycle
- Construction & Tenant Finish
- Smart Home · A/V · Edge Compute
Go up, not out — add a full second story
EVERY PROJECT STARTS WITH DESIGN
Local Service
Pop-Top Addition Services in Commerce City, Colorado
Autotelic provides professional pop-top addition services throughout Commerce City and the surrounding Adams County area. Pop-top second-story additions across the Denver metro — add bedrooms, bathrooms, and living space without expanding your footprint. Structural engineering included. Whether you're in Commerce City (northeast Denver metro) or nearby communities, our team delivers quality workmanship backed by Colorado licensing and full insurance coverage.
Permit Thresholds
Commerce City permit thresholds
- Code reference
- Residential roof sheathing replacements of 256 square feet and under (unless required to be fire-retardant).
- Code reference
- Gutters, kitchen cabinets, on-grade patios, driveways, and certain other minor items (e.g., fences meeting height limits, playground equipment, retaining walls 4 feet and under without surcharge).
- Code reference
- These rules are in Commerce City Revised Municipal Code Chapter 5 (Buildings and Building Regulations), Article I, particularly Sec. 5-5 (scope of the City of Commerce City Building Code and work exempt from code provisions) and the referenced Sec. 5-8 (work exempt from permit requirements).Sec. 5-5
- Code reference
- The city adopts the 2021 IBC/IRC and related codes with local amendments.
- Code reference
- Use tax is collected at 4.5% applied to the dollar cost and/or value of all building and construction materials intended to be used and/or consumed as part of the project (not collapsed into a single rate; confirmed for small projects valued at $500 or less, where the permit fee is $23.50 and th
Codes are amended regularly — verify current requirements with **The Building Safety Division (part of the City of Commerce City’s Community Development Department) issues residential building permits.
Zoning & ADU
Commerce City zoning & ADU quick facts
- Code reference
- ADUs are permitted in single-family residential districts (e.g., R-1 Single-Family Detached Residential District and similar zones) under the 2025 Land Development Code updates. Only one ADU is allowed per single-family lot.
- ADU size limits (applicable across qualifying single-family districts)
- Cannot exceed 75% of the floor area of the principal unit or 1,000 sf, whichever is less; a minimum of 750 sf is permitted regardless of principal unit size.
- ADU height limits
- Must be less than the height of the principal building or 22 ft maximum, whichever is less.
- Code reference
- No specific numeric standards for maximum lot coverage %, primary building height, or district-specific setbacks for additions/garages/primary structures in the most common single-family districts (such as R-1) were located with direct code citations in available sources.
- Code reference
- For full district tables (e.g., R-1 standards in Article IV or equivalent sections of the Land Development Code), consult the official code on Municode or enCodePlus, or contact Commerce City Planning (Planner of the Day).
Codes are amended regularly — verify current requirements with **The Building Safety Division (part of the City of Commerce City’s Community Development Department) issues residential building permits.
Energy Code
Commerce City energy code quick facts
- Code reference
- 2021 IECC (as the City of Commerce City Energy Conservation Code), with local amendments.
- Code reference
- Commerce City adopts the 2021 edition of the International Energy Conservation Code (IECC) as its Energy Conservation Code (both commercial and residential provisions apply, per the city’s Building Code).
- Code reference
- This is incorporated by reference in the Commerce City Revised Municipal Code (C3BC), primarily via Sec. 5-2 (Incorporation by reference), which lists the 2021 IECC among the adopted codes.Sec. 5-2
- Code reference
- It is further detailed and locally amended on the city’s official page for the 2021 IECC.
- Code reference
- The city’s amendments (detailed on the official 2021 IECC adoption page) are primarily administrative/procedural and do not alter the core prescriptive tables or performance requirements of the 2021 IECC itself.
- Code reference
- Amending C101.1 (Title) to reference the City of Commerce City Commercial Energy Conservation Code.
- Code reference
- Requiring digital submission of construction documents with specific energy-related details (e.g., insulation R-values, fenestration U-factors/SHGC, air barrier details).
- Code reference
- Deleting/replacing the fees section (C104) to tie into the city’s municipal code Article VI, Chapter 5.
Codes are amended regularly — verify current requirements with **The Building Safety Division (part of the City of Commerce City’s Community Development Department) issues residential building permits.
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What a Pop-Top Addition Is
A pop-top addition removes the existing roof of a single-story home and builds a new full or partial second story above it. Livable square footage increases while the original footprint stays the same. In the Denver metro, this approach is common in established neighborhoods where side yards, rear yards, and lot coverage leave little room to expand outward. The work is a major structural renovation. It typically includes roof demolition, foundation and wall reinforcement, new second-floor framing, a new roof, staircase construction, utility extensions, and interior and exterior finishes that connect the new level to the original house.
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Typical Scope of Work
Most Denver pop-tops move through these phases: 1. Demolition and temporary weatherproofing after roof and related ceiling or attic removal. 2. Structural evaluation and reinforcement of the existing foundation and load-bearing walls so they can carry the added story. Work may include extended footings, new piers and beams, or, less often, more extensive foundation replacement. A structural engineer designs this work. 3. New second-floor framing with dimensional lumber and engineered members such as I-joists and LVLs. 4. Enclosure with subfloor, walls, windows, doors, and a new roof system, with continuous weather protection. 5. HVAC, electrical, and plumbing extensions or upgrades to serve the new level and meet current codes. Existing HVAC equipment and electrical panels often need replacement or capacity upgrades. 6. Interior finishes (insulation, drywall, flooring, trim, paint) and exterior finishes chosen to match or complement the original architecture. 7. A new staircase linking the first and second floors. Design and permitting commonly take about 3 to 6 months. Active construction often runs about 5 to 7 months. Homeowners frequently need to leave the house during framing, which can last roughly 2 to 8 weeks.
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Denver Permits, Zoning, and Codes
In Denver, pop-top additions are major residential projects reviewed by the City and County of Denver Community Planning and Development (CPD). Related permits and reviews commonly include building, zoning, electrical, plumbing, mechanical/HVAC, and demolition when significant tear-off is required. Properties in historic districts or with landmark status may also need Landmark Preservation Commission review, which can add design constraints and timeline. Zoning controls height, setbacks, and bulk plane. Many single-family zones allow roughly 30–35 feet of height, while some are limited to about 25 feet. Side and rear setbacks and the bulk-plane envelope can force the second story to step back even when the first floor already sits at a lot line. Historic overlays in neighborhoods such as Wash Park, Country Club, and parts of Capitol Hill can add roughly 4–10 weeks for design review. As of mid-2025, Denver’s adopted codes include the 2024 IRC/IBC family for building, mechanical, plumbing, fuel gas, and fire, with the 2021 IECC still used for energy compliance, plus local amendments. Plan review for major residential projects can be lengthy; recent timing for this class of work has been cited around many months, so early zoning verification and complete architectural and structural drawings matter. A municipally licensed Denver general contractor coordinates the project and the licensed specialty trades who pull and perform electrical, plumbing, and mechanical work under the approved plans and inspections.
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Materials, Structure, and Systems
Second-story walls are commonly framed with 2x4 or 2x6 lumber. Floors and roofs often use engineered lumber for longer spans and tighter deflection control. Foundation reinforcement on older Denver homes may include extended concrete footings, new piers and beams, or helical piers where conditions require them. Exterior materials are usually selected to align with the existing house and neighborhood character—brick, stucco, wood, or fiber-cement siding, plus a new roof in asphalt, metal, or another system suited to the design. Energy-code insulation, efficient windows and doors, and a right-sized HVAC system are central because the home’s conditioned volume increases substantially. Utility rough-ins must be integrated with the existing systems rather than treated as a simple add-on.
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What Buyers and Homeowners Should Evaluate
Before starting a pop-top—or buying a home that already has one—review structural documentation, closed permits, and zoning compliance for height, setbacks, and bulk plane. Confirm that foundation capacity was engineered for the second story and that framing, weather barrier, roofing, and finishes integrate cleanly with the original structure. Ask how HVAC capacity, ductwork, electrical service, and plumbing were addressed for the added load. Unpermitted or incomplete work creates inspection, insurance, and resale risk. Expect full-house disruption for a multi-month build, with relocation during open framing. Budget contingency is important because foundation conditions are often not fully known until the structure is opened; a meaningful share of projects need more reinforcement than first assumed. Choose a team with specific Denver pop-top experience, structural-engineer collaboration, and a clear process for design, CPD permitting, inspections, and change management. Neighborhood value ceilings still matter: more square footage helps only when the finished home fits local demand and scale.
FAQ
Common questions
How long does a Denver pop-top addition take?
Design and permitting often take about 3 to 6 months. Construction commonly runs about 5 to 7 months after permits, depending on scope, inspections, historic review, and weather. Framing is usually the most disruptive stretch and may require temporary relocation for several weeks.
Do I have to change the foundation to add a second story?
Often yes, at least in part. Many single-story foundations and walls were not designed for a full second story. A structural engineer evaluates capacity and specifies reinforcement such as extended footings, piers and beams, or other support. Some older homes need more extensive work once conditions are fully visible.
What zoning limits affect a pop-top in Denver?
Height limits, side and rear setbacks, and bulk-plane rules are the main constraints. Even when the first floor is legal, the second story may need to step in or change roof form to stay inside the allowed envelope. Historic districts can add exterior design review on top of standard zoning.
Who handles the trade permits and licensing on a pop-top?
A municipally licensed Denver general contractor coordinates the overall building permit process and project. Licensed specialty trades handle electrical, plumbing, and mechanical work and the related trade permits and inspections under current Denver codes.
Will we need a new HVAC system?
In most cases the existing system is not sized for the added second-story load. Plan on evaluation and, frequently, replacement or major upgrade of equipment and ductwork so both levels heat and cool evenly and meet code.
Can we stay in the house during construction?
Some early and late phases may allow limited occupancy, but the open-roof and framing period is generally not livable. Many households relocate for roughly 2 to 8 weeks during that window, and overall disruption can extend across the full multi-month build.
Service Area
Serving Commerce City and Adams County
We serve Commerce City, 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 Commerce City project.
How It Runs
01
Survey
02
Design
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Build
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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 →TRUSTED TO BUILD FOR
- Punch Bowl SocialFirst four locations
- Spectrum RetirementSenior living communities
- Denver HighlandsFirst modular custom home
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