Second Key NYC
157 13th Street, Brooklyn, NY 11215Licensed ADU contractor and construction management firm for NYC homeowners. We handle eligibility, permitting, and the full build across Queens, Brooklyn, Staten Island, and the Bronx.
read moreLicensed ADU contractor and construction management firm for NYC homeowners. We handle eligibility, permitting, and the full build across Queens, Brooklyn, Staten Island, and the Bronx.
read moreMurray Lampert, San Diego's trusted ADU builder since 1975, offers full design-build services including granny flats, in-law suites, and garage conversions. With 50+ years of experience, they deliver custom, high-quality accessory dwelling units tailored to your needs.
read moreExpert ADU builder offering detached ADUs, garage conversions & backyard cottages. Structured process: feasibility, permits, construction & final walkthrough. Boost property value, enable multigenerational living & create flexible spaces.
read moreVermont Flex Homes is an experienced ADU contractor in Windham County, VT, specializing in permitted, move-in ready accessory dwelling units, garage conversions, in-law suites, and custom ADU builds tailored to Vermont's climate and codes.
read moreArizona Building Contractors, LLC is a locally owned contractor that builds custom ADUs, casitas, guesthouses, and garage conversions throughout the Tucson metro area. They help clients figure out what's possible and we see every project through from start to finish.
read moreAtaman Studio is a trusted ADU contractor in Los Angeles, serving all of California. Full-service design, permitting, and construction for detached ADUs, garage conversions, and in-law units, with compliance to local zoning and state regulations.
read moreCustom 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.
read morePayne & Tompkins Design is Northeast Ohio's premier design-build renovation firm. Founded in 2018, they offer full-service renovations, ADU construction, and structured design processes, ensuring quality craftsmanship and client-focused results.
read moreDoza Build Inc. serves San Bernardino & Riverside County, CA, with 30+ years in construction. Services include ADU construction, garage conversions, remodeling, plumbing, electrical, flooring & more. Free estimates available.
read moreBuildZig ADU Services is a Bay Area ADU contractor specializing in design, permitting, and construction. They handle garage conversions, detached ADUs, basement/attic conversions, and more, offering transparent pricing throughout.
read moreSFBay ADU is a Bay Area ADU contractor offering full-service design, permitting, and construction. Specializing in 600–1,200 sq ft units, they offer studio, 2-bed, garden cottage, and in-law suite options, with projects completed in as little as 6 months.
read moreMighty Small Homes offers prefab ADU kits with 6 customizable models for granny flats, in-law suites, home offices & rentals. Benefits include 60% energy savings, faster builds & superior strength.
read moreOCA Builders is a trusted Santa Cruz general contractor specializing in ADU construction, custom homes, kitchen & bathroom remodeling, room additions, and commercial build-outs, delivering quality craftsmanship with deep local zoning expertise.
read moreSacramento's Summit Building Group offers full-service ADU construction, including custom design, permitting, garage conversions, and detached units. They serve homeowners seeking rental income, multigenerational living, or guest suites, backed by a lifetime workmanship warranty.
read moreCoastal ADU Construction is a Bay Area design/build contractor specializing in accessory dwelling units. They handle detached ADUs, garage conversions, in-law suites, and granny flats, managing both design and construction while navigating local zoning regulations.
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