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BRIGHTON SERVICES
Second-Story Addition in Brighton
Licensed second-story addition services for Brighton and Adams County. Double your living space without moving.
- Full Design Lifecycle
- Construction & Tenant Finish
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Double your living space without moving
EVERY PROJECT STARTS WITH DESIGN
Local Service
Second-Story Addition Services in Brighton, Colorado
Autotelic provides professional second-story addition services throughout Brighton and the surrounding Adams 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 Brighton (northeast Denver metro) or nearby communities, our team delivers quality workmanship backed by Colorado licensing and full insurance coverage.
Permit Thresholds
Brighton permit thresholds
- Brighton, Colorado (City of Brighton building department) requires a building pe
- Any owner or authorized agent who intends to construct, enlarge, alter, repair, move, demolish or change the occupancy of a building or structure, or to erect, install, enlarge, alter, repair, remove, convert or replace any electrical, gas, mechanical or plumbing system...Section R105.1
- Code reference
- This is codified in Brighton Municipal Code (BMC) Chapter 15 (Buildings and Construction), particularly Article 15-28 (International Residential Code adoption and amendments).
- Building
- One-story detached accessory structures (e.g., sheds, playhouses) ≤ 200 sq ft floor area (zoning must still be met); retaining walls ≤ 4 ft high (footing to top); painting, papering, tiling, carpeting, cabinets, countertops, and similar finish work; prefabricated swimming pools < 24" deep; swing set
- Electrical
- Listed plug-and-cord temporary decorative lighting; replacement of a circuit breaker (same location/capacity); low-voltage wiring/devices (< 25 volts, ≤ 50 watts); minor repairs like changing bulbs or same-location fixture/outlet replacement.
- Notes on exemptions and triggers
- The FAQ lists slightly varying shed thresholds (e.g., < 120 sq ft in one place); the dedicated permit guide (200 sq ft) is the more specific reference.
- Code reference
- Any structural alteration, enlargement, or repair affecting the structure generally triggers a permit under the broad “alter/repair” language of R105.1 (no separate valuation-based threshold or explicit “structural trigger” list beyond this).
- Use tax/fee basis
- Use tax is 3.75% applied to 50% of the project valuation (materials + labor).
Codes are amended regularly — verify current requirements with **The City of Brighton (specifically its Community Development/Building Division) issues residential building permits.
Zoning & ADU
Brighton zoning & ADU quick facts
- Code reference
- Most common single-family residential districts in Brighton, CO, include R-1 (Single-Family Residential), R-1A (Single- and Two-Family Residential), and R-1B (City Neighborhood Residential), per LUDC Article 4 (Table 4-1 and related intent descriptions).
- Code reference
- Numeric standards (lot coverage/open space, height, ADU rules, setbacks) are primarily in LUDC Article 5 (esp.
- Code reference
- Table 5-2 Residential District Building Type & Development Standards, as amended) and Article 4.03(B) (Accessory Dwelling standards, as amended by the 2025 ordinance).
- Code reference
- Data is drawn from district tables and use-specific rules; exact per-district lot coverage % and some setbacks are table-based and qualified below where extractable.
- A/R (rural/agricultural residential, less common but relevant for large lots)
- 80% open space.
- Typical suburban/neighborhood detached house districts (R-1 and similar)
- 65% open space.
- More compact or higher-density residential (R-1B, R-2 contexts)
- 40% or lower open space (higher coverage allowed).
- R-1 and similar low-density suburban
- 35 ft / 2.5 stories.
Codes are amended regularly — verify current requirements with **The City of Brighton (specifically its Community Development/Building Division) issues residential building permits.
Energy Code
Brighton energy code quick facts
- Code reference
- 2021 IECC (no specific local energy code amendments identified beyond the base code and any applicable state requirements).
- Code reference
- Brighton’s official codes page explicitly lists the International Energy Conservation Code 2021 (alongside the other 2021 I-Codes).
- Code reference
- Colorado state law (e.g., HB 22-1362) requires adoption of the 2021 IECC (plus electric/solar ready provisions) when updating other building codes, but Brighton’s published list aligns with the 2021 edition without further local overrides described.
- Code reference
- Brighton is in Climate Zone 5B (standard for the Denver-metro/Adams County area).
- Code reference
- Key prescriptive requirements relevant to remodels/additions are drawn from the 2021 IECC (base code) for CZ 5B.
- Code reference
- Specific numeric values and sections are not detailed in Brighton’s public code listings or amendments pages; refer directly to the 2021 IECC Table R402.1.2 (or equivalent) and related sections for wall/ceiling insulation R-values or U-factors, air-sealing thresholds (typically tested or prescriptiv
- Code reference
- The city adopts the 2021 IECC via its standard building code adoption process (see codes page and related ordinances adopting the 2021 I-Codes).
- Construction use tax
- City of Brighton imposes a 3.75% city use tax on construction and building materials (paid on an estimated basis at permit issuance; contractors track and reconcile actuals; present permit to suppliers to avoid duplicate city sales tax).
Codes are amended regularly — verify current requirements with **The City of Brighton (specifically its Community Development/Building Division) issues residential building permits.
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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 Brighton and Adams County
We serve Brighton, 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 Brighton 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 →TRUSTED TO BUILD FOR
- Punch Bowl SocialFirst four locations
- Spectrum RetirementSenior living communities
- Denver HighlandsFirst modular custom home
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