Rescue Restoration specializes in constructing Additional Dwelling Units (ADUs) in Colorado. Their lead chief estimator can help design a custom ADU to fit your needs and financial goals. They are the lead resource in the Denver Metro area when it comes to constructing attached, detached, or basement ADUs.
read more
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
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 ADUs (granny flats, garage conversions, in-law units) offer affordable housing density solutions. DL Engineering Inc. provides structural engineering, design, and permitting services for Denver accessory dwelling unit projects.
read more
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.
read more
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.
read more
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.
read more
As experienced ADU builders in Denver, Kalin Construction has helped numerous homeowners bring their visions for their homes to life. They'll listen to your wants and needs for the project, then craft an ADU that checks all of your boxes. Whether you're interested in a detached ADU or another type of accessory dwelling unit, they specialize in ADU projects that can provide affordable housing and passive income.
read more
ADUs (granny flats, in-law suites) add living space, rental income & property value. Colorado's HB 1152 now requires most local governments to allow ADU construction. Mountain View Builders offers expert ADU contracting in Fremont, Custer, Pueblo & Park County.
read more
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.
read more
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.
read more
NAGY Design built a standout 2,200 sq ft detached ADU in Denver's Sloan's Lake, nominated for Best ADU 2022. Costs range $100K–$300K. Their full-service process covers planning, permits, and construction oversight.
read more
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
River North Basement Company is a Denver ADU contractor offering construction and remodeling services for accessory dwelling units, including rental units, in-law suites, and guest spaces, ensuring code compliance throughout.
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.