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CENTENNIAL SERVICES
Garage Conversion in Centennial
ADU Feasibility Consultation, $350
See all 2 jobsLicensed garage conversion services for Centennial and Arapahoe County. Turn your garage into livable space.
What Centennial requires
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). §R105
See full local requirements ↓- Full Design Lifecycle
- Construction & Tenant Finish
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Turn your garage into livable space
Jobs you can book online
Pick your job and choose a time.
Pay when you book. We confirm within 24 hours or refund you in full.
ADU Feasibility Consultation
An on-site review of your lot against local ADU zoning, setbacks, and utility access.
Pay when you book · morning (8–12) or afternoon (12–4)
What's included
An on-site review of your lot against local ADU zoning, setbacks, and utility access. You get a verbal go/no-go read plus a one-page summary of constraints and next steps.
ADU Feasibility Package
Site visit plus a written feasibility report: local ADU zoning check, buildable envelope sketch, utility routing notes, and a preliminary budget.
$475 deposit to book, the rest when the work is done · morning (8–12) or afternoon (12–4)
What's included
Site visit plus a written feasibility report: local ADU zoning check, buildable envelope sketch, utility routing notes, and a preliminary budget. A documented go/no-go you can take to a lender.
FREE PLANNING TOOLS
Both tools are free and take a couple of minutes — start in either one.
EVERY PROJECT STARTS WITH DESIGN
Local Service
Garage Conversion Services in Centennial, Colorado
Autotelic provides professional garage conversion services throughout Centennial and the surrounding Arapahoe County area. Garage to living space conversions across the Denver metro — studios, offices, guest suites, and ADUs with full HVAC, insulation, and code-compliant egress. Whether you're in Centennial (south Denver metro) or nearby communities, our team delivers quality workmanship, licensed and insured.
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).§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
- NC5 — Minimum Lot Area
- 5000 sfNC5
- NC5 — Minimum Lot Width
- 50 ftNC5
- NC5 — Front Setback (min)
- 15'NC5
- NC5 — Side Interior Setback (min)
- 5'NC5
- NC5 — Side Setback Abutting Street (min)
- 10'NC5
- NC5 — Rear Setback (min)
- 15'NC5
- NC5 — Lot Coverage (max)
- 42%NC5
- NC5 — Building Height (max)
- 30'NC5
Codes are amended regularly — verify current requirements with City of Centennial — Building Division.
The build sequence for a Garage Conversion project
This service is a component of How a ADU project works in Centennial.
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).Ord. 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 garage conversion covers
Garage conversions in the Denver metro turn an attached or detached garage into conditioned living space or, where zoning allows, an accessory dwelling unit. Work typically includes insulation, new openings, electrical, HVAC, and often a bath or kitchen. Parking on the lot still has to satisfy zoning. A municipally licensed Denver general contractor coordinates the project and licensed specialty trades. Cost is project-specific and depends on attached versus detached, ADU versus extra rooms, and how much of the envelope changes.
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What buyers should prepare
Attached versus detached, living space versus ADU, whether a bath or kitchen is included, and how parking will be handled.
FAQ
Common questions
How much does ADU Feasibility Consultation cost in Centennial?
$350.
How do I book?
Press Book next to the job, pick a date and a morning (8–12) or afternoon (12–4) window, and pay in full. We confirm within 24 hours or refund you in full.
Who handles garage conversion permits and licensing?
A municipally licensed Denver general contractor coordinates the project, design professionals, and specialty trades. Colorado has no statewide general contractor license.
Is extra living space the same as an ADU?
No. Extra rooms for the main house stay one dwelling. An ADU is a separate dwelling and is only allowed in districts that permit it.
What information helps define scope?
Attached vs detached, ADU vs extra rooms, parking plan, and city or county.
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.
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 →Explore
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