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Basement Finish in Centennial
Licensed basement finish services for Centennial and Arapahoe County. Unlock your basement's full potential.
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Local Service
Basement Finish Services in Centennial, Colorado
Autotelic provides professional basement finish services throughout Centennial and the surrounding Arapahoe County area. Complete basement finishing across the Denver metro with framing, electrical, plumbing, drywall, and optional bathroom, bar, and home theater. Whether you're in Centennial (south Denver metro) or nearby communities, our team delivers quality workmanship backed by Colorado licensing and full insurance coverage.
Permits & Licensing
Permits in Centennial
Centennial building permits, inspections, and contractor license approvals are handled by the city's Building Division. Permits and contractor licenses must be applied for online through the city's Self-Service Portal, and we handle that process as part of every project. Authority: City of Centennial — Building Division.
Permit Thresholds
Centennial permit thresholds
- Code reference
- In Centennial, Colorado, building permits for residential remodel work are governed by the 2021 International Residential Code (IRC) Section R105 (adopted via Centennial Municipal Code Chapter 18 – Building Regulations, per Ordinance 2023-O-06 and related adoptions of the 2021 I-Codes).Section R105
- Code reference
- Typically exempt work (aligning with IRC R105.2 exemptions, with local application) includes:
- Code reference
- One-story detached accessory structures (e.g., sheds) ≤200 sq ft.
- Code reference
- Fences ≤7 ft high; retaining walls ≤4 ft high (measured from bottom of footing).
- Code reference
- Prefabricated swimming pools <24 inches deep.
- Code reference
- Window awnings projecting ≤54 inches.
- Code reference
- Decks ≤200 sq ft, ≤30 inches above grade, and not attached to the dwelling.
- Use tax (not collapsed into a single rate)
- City of Centennial Use Tax of 2.5% applied to the actual cost of materials, plus Arapahoe County Use Tax of 0.25% applied to the actual cost of materials.
Codes are amended regularly — verify current requirements with City of Centennial — Building Division.
Zoning & ADU
Centennial zoning & ADU quick facts
- Code reference
- Centennial, Colorado (Arapahoe County) Land Development Code (LDC, Chapter 12 of the Municipal Code) governs zoning. New districts were adopted in 2024; the city’s zoning descriptions page notes that details should be verified in the current LDC (Municode).
- Code reference
- The most commonly referenced single-family residential districts for established neighborhoods are the Neighborhood Conservation (NC) subdistricts (NC5, NC6, NC9, NC12, NC18); newer or redevelopment areas use Suburban Residential (RS), Auto-Urban Residential (RA), and Urban Residential (RU).
- Code reference
- Residential development standards in RS/RA/RU/AG/NI generally reference LDC Division 3-4 (Residential Neighborhood Development Standards) and Division 3-5 (Housing Palette); non-residential summaries on the city site are not directly applicable to single-family additions/ADUs/garages.
- ADU permitting (LDC § 12-3-603(H) and related sections)
- Yes, permitted as an accessory use in AG, RS, RA, RU, NC (all subdistricts), and NI districts (plus limited commercial districts on single-family lots only).§ 12-3-603
- ADU max size (LDC § 12-3-603(H))
- ≤ 50% of the principal dwelling’s footprint (exterior wall polygon on the ground), or the full existing attic or basement area (including internal stairwell) without any expansion of those spaces.§ 12-3-603
- ADU height (LDC § 12-3-204 and § 12-3-603(H))
- Attached/interior: same as the primary dwelling in the district.§ 12-3-204
- Detached
- 17 ft maximum.
- ADU setbacks (LDC § 12-3-301 and Table 12-3-301)
- Same minimum setbacks as principal structures in the underlying district (no reduction allowed).§ 12-3-301
Codes are amended regularly — verify current requirements with City of Centennial — Building Division.
Energy Code
Centennial energy code quick facts
- Code reference
- Centennial, Colorado, has adopted the 2018 IECC (with the 2021 I-Codes package) as its energy code, with no mention of Denver-specific overlays such as the Denver Green Code or Energize Denver.
- Code reference
- This is enforced by the City’s Building Division under Ordinance No. 2023-O-06 (adopting the referenced codes by reference, effective as part of the 2021/2023 code update package).Ordinance No. 2023-O-06
- Code reference
- Centennial is in Climate Zone 5B.
- Code reference
- The code applies to alterations, additions, and remodels per IECC Chapter 5 (existing buildings), with the prescriptive requirements of Chapter 4 (or equivalent U-factor/UA paths) generally applying to new or modified portions of the thermal envelope.
- Code reference
- Key prescriptive requirements relevant to remodels/additions (drawn from 2018 IECC Table R402.1.2 and related sections for CZ 5; these are the base code values with no local amendments identified that alter them):
- Ceiling/attic insulation
- Minimum R-49 (or equivalent U-factor ≤ 0.026).
- Adopting reference
- 2018 IECC R402.1.2 (Table R402.1.2).
- Wood-frame wall insulation
- R-20 cavity or R-13 cavity + R-5 continuous insulation (or equivalent U-factor ≤ 0.060).
Codes are amended regularly — verify current requirements with City of Centennial — Building Division.
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What a basement finish usually includes
Finishing a Denver-metro basement typically covers framing, insulation, drywall, flooring, lighting, and often a bathroom or wet bar. Creating legal sleeping rooms usually requires proper egress and smoke/CO devices. Moisture history should be understood before closing walls. A municipally licensed Denver general contractor coordinates the build and the licensed specialty trades required for plumbing, electrical, and mechanical work. Cost is project-specific and depends on square footage, bathroom inclusion, egress needs, and existing dampness.
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Egress, height, and moisture
Ceiling height and egress window or door paths constrain bedroom layouts. Chronic dampness, seepage, or high humidity should be addressed with drainage, grading, or mechanical strategies before finishes. HVAC supply and return paths need planning so the basement is conditioned with the rest of the house.
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Permits and who coordinates the work
City and County of Denver Community Planning and Development typically requires building permits for basement finishes that create habitable space, add bathrooms, or change egress, electrical, plumbing, or mechanical systems. Trade permits and inspections are part of that path. 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 for the basement package.
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What buyers should decide early
Whether bedrooms will be claimed as legal sleeping rooms, bathroom count, office vs family-room use, flooring preferences over concrete, and how storage/mechanical rooms are preserved. Photos of existing moisture stains help the first assessment.
FAQ
Common questions
Do I need a Denver permit to finish my basement?
Usually yes when creating habitable space, adding a bath, or altering egress, electrical, plumbing, or mechanical systems. CPD is the building-permit authority inside Denver.
Who handles basement finish permits and licensing?
A municipally licensed Denver general contractor coordinates the project and the licensed specialty trades required. Colorado has no statewide general contractor license.
What makes a basement bedroom legal?
Proper egress and other code requirements adopted locally. Confirm sleeping-room criteria with the permitting authority before framing.
Should moisture issues be fixed first?
Yes. Closing finishes over active seepage or chronic dampness traps problems. Address drainage and humidity sources before insulation and drywall.
What information helps define an accurate basement finish scope?
Rough square footage, desired rooms, bathroom inclusion, moisture history, ceiling height photos, and the city or county for permitting.
Service Area
Serving Centennial and Arapahoe County
We serve Centennial, 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 Centennial project.
FAQ
Common questions
Does finishing a basement require a permit?
Yes — basement finishes involve framing, electrical, and often plumbing, all of which are permitted and inspected by your municipal building department. Egress requirements for bedrooms are checked at permit review.
Can a finished basement include a bedroom or rental space?
Often, if egress windows and ceiling heights meet code. We review your city’s requirements during design and tell you plainly what is and is not achievable in your space.
What does the process look like?
Design and scope first, then a real estimate in minutes with the Instant Estimate tool, then permits, build, and inspections — one team throughout.
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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