Avorino specializes in ADU construction, offering detached, attached, garage conversion, and above-garage units. Projects range from $250K–$400K, covering design, permitting, and build phases over 10–14 months.
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Horizon Remodeling Inc. is a full-service residential remodeling company offering kitchen, bathroom, roofing, flooring, painting, and ADU conversions. Dedicated project managers coordinate all trades, keeping projects on schedule and within budget... read more
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... read more
Builderwell is an ADU contractor in Orange County, CA, offering full-service design-build solutions for custom accessory dwelling units, including guest houses, in-law suites, and rental units across Irvine, Newport Beach, and Laguna Hills.
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Temecula ADU Builders is a local ADU contractor helping homeowners add accessory dwelling units, including detached ADUs, garage conversions, and granny flats, for rental income, family housing, or tax benefits in Temecula, CA.
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RIA Group Construction (CA Lic. #1143899) is a full-service design-build contractor in Orange County, CA. Specializing in home renovations, new builds, ADUs, kitchen & bathroom remodeling, and pool construction.
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La Tour Builders offers expert ADU construction in Laguna Niguel, CA, including garage conversions, detached units & attached additions. Licensed, insured & code-compliant, they help homeowners add rental income or multigenerational living... read more
Easton Designs and Consulting (EDC) is an Orange County, CA home design, architecture, and remodeling firm. Services include ADU construction, kitchen remodels, room additions, pools, and outdoor living. Free consultations available.
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US Modular Inc. is a trusted ADU builder in Riverside County, CA, with 35+ years of experience. They offer prefab ADUs, garage conversions & casitas starting at $150,000, completed in 6–9 months.
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ADU Cities is a California design-build firm specializing in ADUs, JADUs, garage conversions, and remodels. They manage design, permitting, and construction, helping homeowners add living space, boost property value, or generate rental income.
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DREC Construction Services is a licensed ADU builder in Glendale, CA, with 10+ years of experience. They handle design, permitting, and construction of ADUs for rental income, family housing, and home offices, offering a transferable lifetime warr... read more
Calpacific Contracting builds ADUs, casitas & garage conversions across Riverside, Orange, LA & San Bernardino Counties. 80+ years experience. Full-service: permits, design, construction & inspections handled end-to-end.
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Building an ADU in Riverside takes 8–16 months. JDB Builders guides homeowners through design (1–3 months), permitting (2–4 months), construction (4–8 months), and final inspections (1–2 months) for granny flats, garage conversions, and ... read more
Papaya Construction Group is a licensed design-build ADU contractor in Orange County, CA. Founded in 2018, they offer detached ADUs, garage conversions, attached units & above-garage builds across Irvine, Anaheim & more.
read moreSan Bernardino, California, is the county seat of San Bernardino County — the largest county by area in the contiguous United States. As housing demand continues to surge across Southern California, ADU contractors in San Bernardino are playing a critical role in helping homeowners maximize their property value and create additional living space. With a median home price significantly lower than coastal cities like Los Angeles, San Bernardino presents an excellent opportunity for property owners to invest in Accessory Dwelling Units (ADUs) and generate rental income.
Before breaking ground, it's essential to understand the local rules governing ADU construction. San Bernardino ADU contractors must navigate regulations set by both the City of San Bernardino Development Services Department and California state law. Key regulations include:
Experienced ADU builders in San Bernardino work with a variety of unit types to suit different lot sizes and homeowner goals. Given that many San Bernardino properties feature larger lots compared to coastal cities, detached ADUs are particularly popular here. Common ADU types include:
Hiring a licensed ADU contractor familiar with San Bernardino is crucial for a smooth construction process. Local contractors understand the specific requirements of the City of San Bernardino's Building and Safety Division, including fire safety standards relevant to the region's high fire hazard severity zones. They are also familiar with utility connection protocols through Southern California Edison and local water agencies.
The cost of building an ADU in San Bernardino typically ranges from $100,000 to $300,000, depending on the size, type, and finishes selected. Garage conversions tend to be the most affordable option, while custom detached ADUs command higher budgets. Working with a reputable San Bernardino ADU contractor ensures accurate cost estimates, proper permitting, and quality construction that meets all California building codes.