ADU Contractors in Colorado
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.
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Stream Home Construction
3423 North Prospect Street, Colorado Springs, CO 80907
Stream Home Construction builds attached & detached ADUs in Colorado Springs. Services include custom floor plans, permits, zoning, and inspections. They help homeowners add rental income, family space, or guest units, boosting property value.
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L&D Construction
5151 Bannock Street, Denver, CO 80216
L&D Construction is a trusted ADU contractor and custom home builder led by owner David. Specializing in detached ADUs, granny flats, and full custom homes, they deliver quality craftsmanship, clear communication, and on-budget results.
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Original Roots Design + Build
383 Corona Street, Denver, CO 80218
Central Denver's trusted ADU builders and design/build remodelers specialize in older homes. Offering garage conversions, granny flats, and detached ADUs, their skilled team delivers client-inspired design, quality craftsmanship, and outstanding service.
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TinyMod
8150 Gray Fox Dr, Evergreen, CO 80439
TinyMod (TMOD™) is an offsite development partner offering feasibility analysis, project management, and factory coordination for builders. Services support ADUs, modular communities, BFR, and missing middle housing with up to 60% faster build times.
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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.
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Superior Construction & Home Renovations
9815 Eagle Creek Circle, Commerce City, CO 80022
Superior Construction & Home Renovations builds permitted ADUs in Denver, including backyard cottages, garage conversions, and basement suites. Following Denver's 2024 expansion, ~70% of residential lots now qualify. Full-service from zoning to final inspection.
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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.
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Dragonfly Construction
2221 Broadway, Grand Junction, CO 81507
Dragonfly Construction in Grand Junction, CO offers the best construction remodeling services in the area. Transforming spaces with quality craftsmanship and attention to detail.
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AAA Home Improvements
10701 West Morrison Road, Lakewood, CO 80227
AAA Home Improvements is a Denver ADU contractor building detached, garage conversion, basement, above-garage, and attached ADUs across the Front Range. They manage design, permitting, and construction for homeowners seeking rental income, multigenerational living, or added property value.
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Colorado Tiny Homes
200 S Wilcox St., #301, Castle Rock, CO 80104
Colorado Tiny Homes builds luxury, eco-friendly ADUs across Denver, Castle Rock & the Rockies. Offering standard, mid-range & custom models, plus garage conversions. Free lot assessment included. Full permitting & project management handled.
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EcoMod
22303 Interstate 76 Frontage Road, Hudson, CO 80642
EcoMod is a Denver-based ADU builder offering sustainable, affordable housing using repurposed shipping containers. Models range from 320–800 sq ft, starting at $64,000. Homes are 9x stronger, last 200+ years, and cut construction costs by 30%.
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Sunward Steel Buildings
6800 E. Hampden Ave., Denver, CO 80224
Sunward Steel Buildings offers pre-engineered steel accessory dwelling units (ADUs), including granny flats and in-law suites. As a direct manufacturer, they provide customizable, code-compliant, affordable backyard cottage solutions across North America.
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3R Services
10825 West 32nd Avenue, Wheat Ridge, CO 80033
3R Services builds ADUs in Arvada, CO, including backyard cottages, garage conversions & in-law suites. Projects cost $80K–$250K, take 3–6 months, and include permitting, transparent pricing & a 1-year warranty.
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LITTLETON, LLC
6698 South Iris Street, Littleton, CO 80162
Littleton Construction, LLC is a Denver Metro general contractor since 1994, offering remodeling, additions, kitchens, basements & more. A+ BBB rated, licensed & insured, with 5-star reviews and a 1-year workmanship warranty.
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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.