Roof and Realm is a California-based steel-framed modular home and ADU builder offering fire, earthquake, and wind-resistant structures. Their eco-friendly builds use 98% recyclable materials, generate minimal waste, and support solar-ready, Net Positive energy designs.
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Edri Construction, Inc. is a Mill Valley-based Bay Area ADU contractor offering full-service accessory dwelling unit construction, including garage conversions, detached ADUs, JADUs, and in-law suites, with permit handling and energy-efficient building.
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Todd Jersey Architecture (TJA) is a Berkeley-based sustainable design firm serving the SF Bay Area. Specializing in ADUs, remodels, new homes & historic preservation, TJA combines 30+ years of experience with a performance-driven, eco-conscious approach.
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ADUs by Avatar is a Southern California ADU builder offering a transparent Plan, Design & Build process. They handle feasibility studies, permits, 3D design, and construction, delivering detached ADUs, granny flats & in-law suites on time.
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AK Pahulu Construction, a licensed Bay Area general & concrete contractor since 2015, offers custom homes, ADUs, remodeling, framing & more. Serving Oakland, San Jose, Fremont & beyond. Projects range from $10K–$2M.
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ON Design & Remodeling is a Bay Area ADU builder offering home additions, garage conversions, granny flats, and in-law suites. They help homeowners expand living space, boost property value, and generate rental income.
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Alpha1 Builders in Elk Grove, CA specializes in ADU construction, including garage conversions, attached, detached, junior, and multi-tenant ADUs. They manage design, permitting, and build, helping homeowners add value and rental income.
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Loona Construction Inc. is a San Francisco ADU contractor specializing in detached ADUs, garage conversions, attached ADUs, and JADUs. They handle design, permitting, and construction, helping homeowners add rental income or family housing.
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Backyard Homes is a top ADU builder in Sacramento with 80+ completed units. They offer detached, attached, and conversion ADUs, handling design, permitting, and construction for a seamless experience across the greater Sacramento region.
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Edri Construction, Inc. is a San Francisco-based ADU contractor offering full-service accessory dwelling unit construction across the Bay Area, including garage conversions, detached ADUs, granny flats, and energy-efficient home additions with in-house project management.
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SF Bay ADU is a full-service Bay Area ADU contractor offering design, permitting, and construction for units from 600–1,200 sq ft. Options include studio, 2bed/2bath, garden cottage, and in-law suites for rental income or multigenerational living.
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ADORE Homes is a California ADU contractor specializing in detached ADUs, garage conversions, JADUs & in-law suites. They manage design, permitting & construction, helping homeowners add value & living space.
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ADU Home Addition is a leading Bay Area ADU contractor with 12+ years of experience. They specialize in custom ADU construction, in-law suites, garage conversions, home additions, and rental-optimized ADUs, handling design, permits, and full construction.
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DNM Architecture is a California-based firm specializing in ADU design and permitting. Their ADUxDNM program covers site analysis, design, permitting, and construction management, offering detached ADUs, garage conversions, and more.
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Samara's Backyard ADU offers prefab accessory dwelling units for California homeowners. Five sizes available, including the 950 sq ft XL 10. Factory-built, fire-resistant, energy-efficient, with full-service permitting, installation & flexible financing.
read moreConcord, California, located in Contra Costa County, is one of the largest cities in the East Bay region with a population of over 130,000 residents. As housing demand continues to surge throughout the Bay Area, ADU contractors in Concord, CA are playing a critical role in helping homeowners maximize their property potential. Concord's relatively spacious suburban lots, combined with California's progressive ADU legislation, make it an ideal city for accessory dwelling unit construction.
Before breaking ground, experienced ADU contractors in Concord must navigate the city's specific permitting requirements through the Concord Community Development Department. Concord follows California state ADU laws (AB 68, AB 881, and SB 13), which streamline approvals and limit excessive local restrictions. Key regulations homeowners and contractors should be aware of include:
Professional ADU builders in Concord, CA typically work on several types of accessory dwelling units suited to the city's residential neighborhoods. Given Concord's mix of ranch-style homes and larger suburban lots, the most popular options include:
Working with a licensed ADU contractor familiar with Concord's building codes is essential for a smooth construction process. Local contractors understand Concord's specific zoning maps, utility connection requirements through Contra Costa Water District, and the nuances of working within established neighborhoods. They can also efficiently coordinate with PG&E for electrical upgrades, which is often necessary for new ADU construction in the area.
The cost of building an ADU in Concord typically ranges from $150,000 to $350,000 depending on size, type, and finishes. Given Concord's rental market, where average rents continue to rise alongside Bay Area demand, homeowners can expect strong returns on investment. A well-built ADU can generate $1,500 to $2,500 per month in rental income, making it a financially sound long-term investment for Concord property owners.