ADU Contractors in Colorado
Verified Builders
1660 Lafayette Street, Denver, CO 80218
Verified Builders is a licensed Denver remodeling company offering ADU construction, kitchen & bathroom remodeling, basement finishing, and custom home builds. Serving Denver, Littleton, Aurora & more since 2016.
read more
S&T Construction
PO Box 1075, Buena Vista, CO 81211
S&T Construction builds ADUs in Chaffee, Lake, and Park County, Colorado. Services include garage conversions, detached ADUs, backyard cottages, and in-law suites, all designed for high-altitude mountain living.
read more
Giudice Builds
Colorado Springs, CO 80927
Giudice Builds is a Colorado Springs ADU contractor specializing in accessory dwelling units. Projects range from $250K–$400K+, with planning from $5K. A recent 640 sq ft ADU was completed in 6.5 months for $230K.
read more
Studio Home by Studio Shed
1500 Cherry Street, Louisville, CO 80027
Studio Home by Studio Shed offers custom & prefab ADUs across Texas, including San Antonio, Austin, Dallas & Houston. Units range from studios to full living spaces. Permit costs vary: Dallas $3K–$8K, Houston $2.5K–$7.5K.
read more
Denver ADU Builders
970 S Clayton Way, Denver, CO 80209
Denver ADU Builders helps Denver homeowners plan and build ADUs. Services cover permits, design, and construction. Rental income potential ranges from $2,220–$7,000/month. 40+ years of local building experience.
read more
Krick Design Build
759 1/2 Elati Street, Denver, CO 80204
Krick Design + Build is a Colorado Front Range residential design-build firm specializing in ADUs. Founded by Licensed Architect Matthew Krick, they've completed 57+ ADUs including backyard cottages, garage conversions, and in-law suites.
read more
NOCO Design Build
1275 Grant St, Denver, CO 80203
NOCO Design Build is a Colorado contractor offering full-service residential remodeling and construction, including kitchen and bathroom remodels, new construction, ADUs, basement finishing, garage conversions, and custom projects.
read more
Denver Custom ADU
10790 West 50th Avenue, Wheat Ridge, CO 80033
Denver Custom ADU is a trusted ADU builder in Denver with 30+ years of experience. Led by Matt Brinn, they offer fixed pricing, monthly billing, proactive permitting, and commercial-grade standards for every residential ADU project.
read more
ADU 5280
440 Pennsylvania Street, Denver, CO 80203
ADU 5280 is a Denver-based ADU design-build company since 2013, offering detached ADUs, garage conversions & home additions. They manage zoning, permits, design & construction for homeowners looking to boost property value.
read more
Vertical Contracting - Detached Garage Builders
516 South Xenon Court, Lakewood, CO 80228
Vertical Contracting is a licensed full-service construction & remodeling company offering garage builds, ADU conversions, interior remodeling, pergolas, and flatwork. Known for quality craftsmanship and client-focused service.
read more
Prospect 30 Eight Construction Inc
2944 Routt Circle, Lakewood, CO 80215
Prospect 30 Eight Construction proudly offers its high-quality building services to the charming community of Littleton. Known for its unique blend of suburban tranquility and easy access to metropolitan conveniences, Littleton is the ideal settin... read more
Koeppen Construction
7845 Lookout Road, Longmont, CO 80503
Koeppen Construction builds Accessory Dwelling Units (ADUs) in Longmont, CO, and nearby areas. Services include detached, attached, and garage conversion ADUs for rental, multigenerational living, or guest use. Permitting assistance included.
read more
Denver Dream Builders
2339 East 5th Avenue, Denver, CO 80206
Colorado general contractor since 2005, offering ADU builds, kitchen remodels, bathroom renovations, basement finishing, roofing, and new home construction. Free consultation, no upfront payment, licensed and insured.
read more
Urban ADU
19 N Tejon St Suite 313, Colorado Springs, CO 80903
Urban ADU builds energy-efficient accessory dwelling units in Colorado Springs, CO. Featuring spray foam insulation, solar options, Zero Energy Ready certification, and 3D planning tools, they simplify ADU construction from permits to placement.read more
Alex Home Pro
4851 S Lisbon Way, Aurora, CO 80015
Alex Home Pro builds attached, detached, garage conversion, junior, and internal ADUs. Services cover design, permitting, and construction tailored to each property. ADUs can generate rental income, house family, or add long-term property value.read more
Other cities in Colorado
What you need to know
ADU Contractors in Colorado: Navigating the Mile-High State's Housing Landscape
Colorado has become one of the most progressive states in the country when it comes to Accessory Dwelling Units (ADUs). In 2024, Colorado passed House Bill 24-1152, a landmark piece of legislation that requires most municipalities to allow ADUs in single-family residential zones statewide. This sweeping reform has created a significant surge in demand for qualified ADU contractors in Colorado, as homeowners across Denver, Boulder, Colorado Springs, and Fort Collins look to capitalize on new building opportunities. Whether you're looking to add a detached guest house, a basement apartment, or a garage conversion, finding the right ADU contractor in Colorado is more important than ever.
What Colorado ADU Contractors Must Know About Local Regulations
While state law has opened the door for ADU construction, Colorado ADU contractors must still navigate a complex web of local zoning codes, building permits, and design standards. Each municipality retains the right to impose certain restrictions, including:
- Maximum square footage limits (often capped between 800 and 1,000 sq ft)
- Owner-occupancy requirements in some jurisdictions
- Setback and height restrictions specific to each city or county
- Utility connection and infrastructure requirements
- Design compatibility standards to match the primary residence
Experienced ADU builders in Colorado understand that working in Denver's zoning districts differs greatly from building in mountain communities like Aspen or Steamboat Springs, where terrain, elevation, and environmental regulations add additional layers of complexity to any construction project.
Types of ADUs Colorado Contractors Commonly Build
Skilled ADU contractors in Colorado are well-versed in constructing a variety of unit types to suit different property layouts and homeowner needs. The most common ADU types built across the state include:
- Detached ADUs: Standalone structures built in the backyard, separate from the main home
- Attached ADUs: Units connected to the primary residence, sharing at least one wall
- Garage Conversions: Transforming existing garages into livable, permitted dwelling spaces
- Basement ADUs: Converting unfinished basements into fully functional apartments
- Junior ADUs (JADUs): Smaller units created within the existing footprint of the home
Choosing the Right ADU Contractor in Colorado
When selecting an ADU contractor in Colorado, homeowners should prioritize professionals who are licensed through the Colorado Department of Regulatory Agencies (DORA) and carry proper liability insurance and workers' compensation coverage. A reputable contractor will handle the entire process, from initial design and permit applications to final inspections. Look for contractors with demonstrated experience in Colorado's unique climate considerations, including energy efficiency requirements under the Colorado Energy Code, proper insulation for high-altitude winters, and compliance with wildfire mitigation standards in applicable zones.
The Investment Value of Building an ADU in Colorado
With Colorado's housing market remaining highly competitive and rental demand strong in cities like Denver and Boulder, adding an ADU is a smart financial move. Colorado ADU contractors report that well-built units can generate significant rental income while also increasing overall property value. As the state continues to address its housing shortage, investing in a professionally built ADU with a qualified Colorado contractor is one of the most strategic home improvement decisions a property owner can make.