Detached ADU

Willbii is a California ADU contractor specializing in granny flats, garage conversions, and in-law suites. They guide homeowners from consultation to construction, handling permits and design. ADUs can generate up to $5,000/month in rental income.

Colibri Kitchen & Bath offers full-service ADU construction in Oakland, handling design, permitting, and building. Services include site assessment, architectural plans, 3D renderings, and complete construction from foundation to finishing.

CentrePoint Construction Inc. offers turnkey ADU construction and garage conversions in Los Angeles. Services include detached ADUs, JADUs, design, permits, and city approvals—ideal for rental income or family housing.

CMJR Construction Inc. is a fully insured general contractor in Carson City, NV, with 30+ years of experience. Services include kitchen & bathroom remodeling, home additions, deck installation, commercial construction, and ADU building.

Gauntlet Construction is a licensed ADU builder & design-build contractor in Roseville, CA. Serving Sacramento & Placer County, they offer ADU construction, garage conversions, home renovation & commercial builds with 15+ years of experience.

Lumina Builders Inc. follows a 5-step remodeling process: consultation, permits, design, construction, and quality check. Serving San Diego, they handle ADUs, garage conversions, and full home remodels with dedicated project management.

Cairn Collaborative designed a 1,000 sq ft Passive House ADU in San Luis Obispo. This fossil-fuel-free, 3-bed/2-bath unit features airtight construction, heat pumps, HRV system, and thermally broken windows for minimal energy costs and long-term performance.

An Accessory Dwelling Unit (ADU), also known as a granny flat or in-law suite, is a self-contained living space that boosts property value by 20–30%, generates rental income, supports multigenerational living, and promotes environmental sustainability.

Rosegold Builders builds custom ADUs across the Bay Area and Los Angeles, handling permits, zoning, and construction. Services include garage conversions, backyard cottages, and rental units designed to boost property value.

California's 2020 ADU laws allow two ADUs on single-family lots, reduced setbacks, larger units up to 800 sq ft, no owner-occupancy rules until 2025, faster approvals, and expanded parking exemptions statewide.

Massachusetts homeowners can get permit-ready ADU plans starting at $800, delivered in days. Three tiers cover plans, cost estimates, and full custom design up to $3,100. Free ADU Starter Guide available.

Greyhawk Construction offers full-service ADU construction, including garage conversions, detached backyard cottages, granny flats, and in-law suites. They manage design, permitting, and build, helping homeowners add value and flexible living space.