Attached ADU in California

Licensed ADU contractor Full Steam Ahead Construction serves East Bay homeowners with custom accessory dwelling units, including garage conversions, backyard cottages & in-law suites. Serving Concord, Oakland, Berkeley & more.

A1 Home Builder (CA License #885624) is a Lancaster-based ADU contractor and residential builder serving the Antelope Valley since 2006, specializing in garage conversions, detached ADUs, and new single-family home construction.

ASL Remodeling is a California licensed ADU contractor (CSLB #1060310) with 20+ years experience and 300+ completed projects. Services include detached ADUs, garage conversions, granny flats, JADUs, and in-law suites with full design-build support... read more

Golden ADU, serving Southern California since 2021, specializes in custom ADU construction including garage conversions and detached backyard cottages. They offer flexible financing with no upfront costs, completing most projects in 6–12 months.... read more

RODO Development LLC is a licensed LA-based ADU contractor offering full-service design-build solutions including garage conversions, detached ADUs, attached ADUs, basement conversions & custom designs across Los Angeles and surrounding areas.... read more

Snow Construction is an LA-based ADU and granny flat builder offering planning, design, and construction services. They help homeowners add secondary units, navigate permits, and understand parking rules under California's 2017 ADU legislation.read more

KN Remodeling is a certified ADU contractor serving Los Angeles, Woodland Hills, Simi Valley & Thousand Oaks. Specializing in detached ADUs, attached ADUs & garage conversions, they handle design, permits & construction with 100+ ADU p... read more

Lee & Co Contractors builds custom ADUs and home additions in Sacramento, Auburn, and Northern California. Services include detached ADUs, in-law suites, garage conversions, and home expansions, with a planning-first approach for smooth constr... read more

Peck General Construction builds ADUs in Orange County, Los Angeles & Inland Empire. Services include garage conversions, detached backyard cottages & granny flats. Full-service from permits to final inspection under a Design-Build model.<... read more

Vertebrae is an LA-based, woman-owned architecture studio founded in 2012, specializing in ADU design and small-space living. Award-winning projects include the 2025 Architizer A+ Award and 2023 AIA LA Honor Award winners.

At Ingenuity Construction Group, we specialize in crafting exceptional Accessory Dwelling Units (ADUs) that blend seamlessly with your existing property. With over 20 years of experience, our dedicated team ensures each ADU project is completed wi... read more

King Mahdi Builders is an ADU contractor offering detached ADUs, garage conversions, in-law suites, JADUs, granny flats, and casitas. They also handle general home renovation and remodeling projects.

ADU Hotline offers affordable ADU design and permitting in Southern California. From granny flats to garage conversions, they handle the full process in 3–4 weeks, helping homeowners add rental income or family housing efficiently.

Vision Home Remodeling Inc. offers full-service ADU construction in Los Angeles, including detached units, attached dwellings, casitas, and rental-ready granny flats. Services cover design, permitting, and ground-up builds tailored to LA zoning la... read more

DYM Builders is an ADU contractor in Los Angeles & Orange County, CA, offering design, permitting & construction services for detached ADUs, garage conversions, attached units & tiny homes since 2016.