USModular Inc. is a Temecula, CA ADU builder specializing in modular, prefabricated construction. Units are up to 90% factory-built, completed in ~120 days, and comply with IRC and local codes. Services include feasibility studies, design, engineering, permitting, and installation.
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Aligcus is an experienced ADU contractor specializing in detached ADUs, garage conversions, JADUs, granny flats, in-law suites, and backyard cottages. They guide homeowners through permitting and construction for all accessory dwelling unit projects.
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SDS Homes Construction is a Temecula, CA design-build contractor specializing in ADUs, granny flats, and Casitas. They offer turnkey services from design to permitting and construction, serving Temecula and Murrieta homeowners.
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Levatto Construction offers ADU construction in Redlands, CA, including granny flats, garage conversions, backyard cottages & attached units. Code-compliant builds tailored to your property goals.
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Custom Home Builders Malibu specializes in ADU construction, backyard Casitas & granny flats. They offer turnkey design-build services, handling permits & compliance with California ADU laws for legal, independent living spaces.
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Full-service ADU contractor offering design, permitting, and construction of detached ADUs, attached ADUs, JADUs, and garage conversions. Most builds complete in 3–5 months. Includes quartz countertops, tile showers, and luxury vinyl flooring. Rental prep support available.
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L Square Construction is an ADU contractor serving Los Angeles & Orange County, CA. They offer full-service design-build ADU solutions including detached units, in-law suites, garage conversions, and energy-efficient builds with solar integration.
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Considering an ADU in California? Sea Pointe Design & Remodel helps homeowners plan and build accessory dwelling units, including garage conversions, granny flats, and backyard cottages, handling permits, design, and construction.
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San Gorgonio Builders is a licensed General B contractor near Banning, CA, with 40+ years of experience. Specializing in ADU construction, garage conversions, custom homes, and remodeling across Riverside, San Bernardino, Orange, and Los Angeles Counties.
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EZ ADU & Garage Conversion is a trusted ADU builder and garage conversion contractor in Orange County, CA. They offer custom ADU construction, garage conversions, design, and permitting services for homeowners seeking quality living space solutions.
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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 warranty.
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OC Builders Group specializes in ADU construction in California, offering detached ADUs, garage conversions, granny flats & in-law suites. They help homeowners navigate permits, zoning & state regulations to add rental income or housing value.
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Our Expert Team offers dependable expert services on short notice because of our extensive network of employees and sub-contractors located throughout California. Our teams of respectable employees are always willing to help accommodate our customer’s needs, by going the extra mile, especially when it comes to meeting those critical deadlines.
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Fullerton ADU Builder offers expert ADU construction services including detached ADUs, garage conversions, JADUs, in-law suites & home additions. 10+ years experience, licensed & insured, transparent pricing, free consultations & full permit handling.
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.