Expert ADU contractors handle detached ADUs, garage conversions, granny flats, JADUs & in-law suites. From design and permitting to final inspection, experienced ADU builders ensure code-compliant, high-quality accessory dwelling unit construction.
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O'Brien Construction LLC is an ADU contractor specializing in design, engineering, and construction of accessory dwelling units. Services include detached ADUs, additions, and design-assisted builds, with free consultations available.
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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.
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ADUs are self-contained units like garage apartments or granny flats built on existing properties. In Denver, ALH Contracting helps homeowners build ADUs for rental income, family housing, or added property value.
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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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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 setting for a custom home, home addition, and Accessory Dwelling Unit (ADU).
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JT Home Building specializes in ADU construction with 15+ years of experience. Services include detached ADUs, garage conversions, granny flats & casitas. Custom solutions for rental income, family housing & property value growth.
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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.
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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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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.
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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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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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Arch Design & Build is a licensed Denver remodeling company specializing in ADU construction, garage conversions, kitchen & bathroom remodeling, basement finishing, and home additions. They offer upfront pricing, VR design previews, and a proven step-by-step process.
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Alpine ADU builds custom & prefab ADUs, garage conversions, and tiny homes across Greater Denver, Boulder, Fort Collins & Colorado Springs. Services include design, permits, and full construction management on Colorado's Front Range.
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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 moreBoulder, Colorado is widely recognized as one of the most progressive and environmentally conscious cities in the nation. With its strict growth management policies, including the Boulder Valley Comprehensive Plan and the city's urban growth boundary, housing density has become a critical issue. Accessory Dwelling Units (ADUs) have emerged as a key solution to Boulder's housing shortage, and experienced ADU contractors in Boulder, CO play a vital role in helping homeowners navigate this unique landscape.
Working with a knowledgeable ADU contractor in Boulder is essential because the city has specific rules governing ADU construction. Boulder's zoning code allows ADUs in most residential zones, but contractors must be well-versed in the following requirements:
Experienced ADU builders in Boulder, Colorado are skilled in constructing various types of accessory dwelling units to suit different property configurations and homeowner needs. The most common types include:
Hiring a local ADU contractor in Boulder offers significant advantages. Local professionals understand the nuances of Boulder's permitting process through the City of Boulder Planning and Development Services department. They are familiar with the city's emphasis on sustainable building practices, including solar-ready construction and high-performance insulation standards that align with Boulder's 80% emissions reduction goal by 2050. A local contractor can also help homeowners take advantage of Boulder's ADU incentive programs and navigate neighborhood-specific design guidelines.
Given Boulder's consistently high property values and strong rental market — driven in part by the University of Colorado Boulder — adding an ADU can be an excellent financial investment. A well-built ADU can generate significant rental income while increasing overall property value. Working with a qualified, licensed ADU contractor in Boulder, CO ensures your project is completed efficiently, up to code, and built to last in Colorado's variable mountain climate.