Attached ADU near Rancho Santa Margarita, CA

TNT Design & Build specializes in ADUs, garage conversions & room additions in San Diego's North County. 15 years experience, in-house management, free architectural design, prices from $325/sqft with guaranteed budget & timeline.

Dobson Construction Inc. is a Bay Area ADU contractor with 16+ years of experience building home additions, detached ADUs, guest suites, and garage conversions. They handle design, permits, and construction for functional, value-adding residential spaces.

Avica Construction & Development Inc is a licensed LA-based ADU contractor building detached ADUs, garage conversions, attached ADUs & JADUs across Los Angeles, Orange County & San Bernardino County, managing design, permits & construction.

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.

Revival Homes is a California ADU project manager handling planning, financing, design, permitting, and construction. They build detached ADUs, garage conversions, JADUs, and more, with costs ranging from $100K to $300K.

Structura Remodeling is an LA-based licensed ADU contractor specializing in Accessory Dwelling Units, garage conversions & JADUs. Costs range $115K–$145K. Financing options include HELOC & construction loans. Free consultation available.

John Christopher Construction is a Southern California general contractor specializing in ADU design and building. Serving Huntington Beach, Newport Beach, Costa Mesa & more, they offer custom and pre-engineered ADU plans for rental units, in-law suites & more.

ADU's by Design is an Inland Empire ADU contractor serving Riverside & San Bernardino County. They offer full-service accessory dwelling unit design & construction, including detached ADUs, garage conversions, remodeling & architectural design.

Homes by Hedges is an experienced ADU contractor in North San Diego County, building granny flats, casitas & garage conversions. Serving Valley Center, Escondido & more for 25+ years, managing permits & local zoning regulations.

Waconah Construction builds custom ADUs in West Los Angeles, including backyard cottages, garage conversions, above-garage units, and granny flats. Serving Santa Monica, Venice, Brentwood & Beverly Hills, they guide homeowners through design, permitting, and construction.

Sterling-Watson Collective is a full-service ADU contractor in Los Angeles offering design, permitting, structural engineering & construction management for accessory dwelling units, helping homeowners add rental units, guest suites & more.

ADUs (accessory dwelling units) are self-contained homes on existing properties, ideal for rentals or multi-generational living. Costs range $100K–$200K. Baum Construction & Development Inc builds ADUs in Long Beach, CA.

Woollard Construction is a family run general contractor specializing in ADUs and bathroom remodels. Formed over 25 years ago in Temecula, California, we deliver professional building projects with care and precision in Temecula and Murrieta.

AMG Construction INC offers residential & commercial remodeling, new builds, ADU construction, room additions, and roofing services. Licensed and insured, they handle full projects from design to completion.