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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Henze Construction builds custom tiny homes and ADUs, including detached units, backyard cottages, and granny flats. Their 240 sq ft Architectural Tiny Home featured spruce wood, oak countertops, and propane systems. Custom builds available.
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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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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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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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Arciform is a Portland-based ADU design/build firm specializing in accessory dwelling units, including garage conversions, detached ADUs & in-law suites. They handle permits, historic properties & full construction.
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Denver homeowners can boost property value and earn rental income by building an ADU. 5280ADU, a division of Revo Renovations, offers full-service ADU construction, garage conversions, remodels, and more across Denver County.
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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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Evans Construction LLC is a Colorado Springs ADU builder offering attached, detached, and garage conversion ADUs. Services include design, permitting, and construction, helping homeowners add rental income, multigenerational living, or guest space.
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Kindred Tiny Homes builds custom stick-built ADUs across Colorado. Studios from $98K, 1-bed to $220K, 2-bed to $287K. Earn $2K–$3K/month rental income, boost property value 20–40%. Full project management, transparent pricing, 12-month timeline.
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Elmntl builds modular ADUs across Denver and Colorado's Front Range. Specializing in detached ADUs, garage conversions, and in-law suites, they handle zoning, permitting, and installation with a 10-year structural warranty.
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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.
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Riverwood Homes of Colorado, based in Colorado Springs, specializes in custom home building and luxury remodeling with 20+ years of experience. Award-winning at the 2021 Parade of Homes, they serve Monument, Castle Rock, Parker & more.
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Custom ADU Builders, LLC is Denver's trusted ADU contractor offering detached ADUs, garage conversions, and home remodeling. Serving Aurora, Lakewood & more with transparent pricing and expert permitting support.
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L&D Construction builds ADUs across Denver, including detached units, garage conversions, and attached living spaces. Projects focus on multigenerational living, rental income, and accessibility, serving neighborhoods citywide with zoning-compliant, adaptable designs.
read moreColorado 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.
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:
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.
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:
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.
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.