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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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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ADUscale is an independent ADU advisory service offering feasibility assessments, contractor verification, escrow-based payment protection, and construction oversight. Fixed-fee, conflict-free guidance for homeowners planning detached ADUs, garage conversions, or backyard cottages.
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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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NAMA Construction is a family-owned Los Angeles remodeling company with 75 years of experience. Services include ADU construction, kitchen & bathroom remodeling, whole house renovations, flooring, and painting across Greater LA.
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Pros ADU Builders in El Cerrito specializes in ADU construction, including detached units, garage conversions, in-law suites, and granny flats. They handle permits, planning, and turnkey builds tailored to each property.
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Jean Prescott Studio offers ADU design, construction, and home remodeling services in San Clemente. Services include kitchen remodels, bathroom renovations, room additions, permit management, and custom ADU plans for rental income or flexible living.
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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.
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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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LPI Construction offers custom homes, ADU construction, and solar electric systems. Services cover hillside builds, detached/attached ADUs, garage conversions, and sustainable building practices, managing full project lifecycles from permits to completion.
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Coastal Builders is a Long Beach, CA ADU contractor specializing in detached, attached, garage conversion, basement, and attic ADUs. They offer design consultation, ADA-compliant builds, and custom units like granny flats and in-law suites.
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Full Circle Builders offers custom ADU construction in Riverside County & the Inland Empire. Detached ADUs start at $185,000 (590 sq ft, 1BD/1BA). Container homes also available. Turn-key builds, permitting assistance included.
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The ADU Company, a licensed ADU contractor in Covina, CA, serves greater Los Angeles with expert accessory dwelling unit design and construction, including garage conversions, detached ADUs, JADUs, home additions, remodels, and more.
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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.
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.