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Garage Conversion in Louisville

Licensed garage conversion services for Louisville and Boulder County. Turn your garage into livable space.

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Garage Conversion

Turn your garage into livable space

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Local Service

Garage Conversion Services in Louisville, Colorado

Autotelic provides professional garage conversion services throughout Louisville and the surrounding Boulder 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 Louisville (between Denver and Boulder) or nearby communities, our team delivers quality workmanship backed by Colorado licensing and full insurance coverage.

Permit Thresholds

Louisville permit thresholds

Code/municipal code sections
Louisville Municipal Code Chapter 15 (Buildings and Construction), which incorporates the 2024 ICC codes (IBC, IRC, IECC, IEBC, etc., effective December 6, 2025) with local amendments via Ordinance 2025-1907 (No. 1907-2025).Ordinance 2025-1907
Building permit fee follows a progressive table (e.g., $0–$500
$28; higher brackets up to $1M+ with per-$1,000 increments; exact amounts per the published schedule).
Plan review (in-house)
65% of the building fee.
Boulder County Use Tax
1.185% of 50% of Total Valuation.
City of Louisville Use Tax
3.775% of 50% of Total Valuation.
Code reference
Impact fees may apply for additions or remodels increasing finished floor area over 500 sq ft (per category tables; first 500 sq ft often exempt).
Ordinance 2025-1907Source: louisvilleco.gov

Codes are amended regularly — verify current requirements with **The City of Louisville, Colorado’s Building Safety Division (part of the city government) issues residential building permits.

Zoning & ADU

Louisville zoning & ADU quick facts

Code reference
ADUs are permitted in all zone districts (including PUDs) that allow single-family detached or attached units, such as the most common single-family districts SF-LD, SF-MD, and SF-HD (per Sec. 17.12.010). This follows the 2025 ADU ordinance (effective June 23, 2025) implementing state requiremenSec. 17.12.010
ADU max size
Attached ADUs: 1,000 sq ft maximum.
Detached ADUs
800 sq ft maximum.
Code reference
ADUs cannot exceed 75% of the primary house square footage or the district maximum (whichever is less); however, ADUs of at least 500 sq ft are allowed if other requirements are met.
Code reference
Incentives allow up to 1,000 sq ft (detached) or 1,200 sq ft (attached) for historic landmarks, affordable deed-restricted units, or accessible units.
Detached ADUs
25 feet.
Setbacks
Attached ADUs follow primary house setbacks for the district, except minimum rear setback of 10 feet.
Max lot coverage %
ADUs are subject to the overall lot coverage and floor area ratio (FAR) requirements of the applicable district (e.g., SF-LD, SF-MD, SF-HD per the schedule in Chapter 17.12/17.16).

Codes are amended regularly — verify current requirements with **The City of Louisville, Colorado’s Building Safety Division (part of the city government) issues residential building permits.

Energy Code

Louisville energy code quick facts

Code reference
2024 International Energy Conservation Code (IECC), effective December 6, 2025 (adopted via the City of Louisville’s 2024 ICC Code Adoption ordinance), along with the Colorado Model Electric Ready and Solar Ready Code (also effective 12/6/25).
Code reference
Louisville is in Climate Zone 5B.
Code reference
The 2024 IECC (with the model ready codes) applies to new construction and, via Chapter 5 [RE], to additions, alterations, and remodels involving the building thermal envelope.
Code reference
Key prescriptive requirements relevant to remodels/additions (drawn from 2024 IECC Table R402.1.2 and related sections for CZ 5 / 5B; additions must meet these for new envelope areas or the whole-building UA alternative):
Ceiling/attic insulation
Maximum assembly U-factor 0.026 (2024 IECC Table R402.1.2).
Wood-frame wall insulation
Maximum assembly U-factor 0.045 (or equivalent prescriptive R-value combinations such as R-20 + R-5ci or R-13 + R-10ci; note R408 tradeoffs may allow reduced wall performance with additional measures) (2024 IECC Table R402.1.2 and R408).
Vertical fenestration (windows/doors)
Maximum U-factor 0.28 (2024 IECC Table R402.1.2).
Skylights
Maximum U-factor 0.50 (2024 IECC Table R402.1.2).

Codes are amended regularly — verify current requirements with **The City of Louisville, Colorado’s Building Safety Division (part of the city government) issues residential building permits.

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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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Occupancy, energy code, and ADUs

Turning an unconditioned garage into a bedroom is a change of space conditioning. Denver Energy Code Chapter 5 [RE] treats that as a change of occupancy or use and applies addition/new-construction energy rules to the newly conditioned space. Creating a separate ADU is a different zoning path: the district must allow an accessory dwelling unit, and plans must clearly label the ADU and the primary structure. Transportation review is listed for ADUs, garages, and increases in dwelling units.

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Permits and who coordinates the work

City and County of Denver Community Planning and Development requires architectural and structural review for occupancy or use changes, plus zoning, building, and typically SUDP. Exterior changes on landmarks or in historic districts need Landmark review. 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

Attached versus detached, living space versus ADU, whether a bath or kitchen is included, and how parking will be handled.

FAQ

Common questions

Does converting a garage need a Denver permit?

Yes. It is a change of occupancy or use. CPD requires building and zoning review, and typically SUDP.

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.

Does energy code apply to a cold garage?

Yes once it becomes conditioned. Denver Energy Code uses turning an unconditioned garage into a bedroom as an example of a change of space conditioning.

What information helps define scope?

Attached vs detached, ADU vs extra rooms, parking plan, and city or county.

Service Area

Serving Louisville and Boulder County

We serve Louisville, 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 Louisville project.

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