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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At Doran Companies LLC, we specialize in creating accessory dwelling units (ADUs) that are not just spaces, but extensions of your home’s character. Whether you’re considering garage conversions, new construction, or in-law suites, our expertise ensures a seamless blend of functionality and aesthetics.
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Build ADU Home Remodel is a trusted, licensed general contractor serving homeowners throughout the Inland Empire with full-service ADU construction. Whether you're looking to add rental income, house extended family, or increase your property value, we build ADUs that meet your needs and exceed your expectations.
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USA Builders Pro offers 20+ years of ADU construction and home addition services. Specializing in detached & attached ADUs, room additions, permits, and zoning compliance, they help homeowners boost property value and living space.
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Pixel Arch LLC, Glendale CA, offers residential architecture services including custom home design, ADUs, garage conversions, duplexes & remodeling. Permit-ready plans, Title 24 reports & 3D renderings for California clients.
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Smart ADU Builder offers customizable ADU floor plans from 400–1,200 sq ft, including granny flats, in-law suites & backyard cottages. Choose from 20+ pre-approved plans or custom designs with smart home features & energy-efficient systems.
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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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SE Builders Inc completed an ADU project in Fullerton, CA, transforming a structure into a modern living space. Features include updated framing, durable finishes, eco-friendly materials, energy-efficient systems, and low-maintenance landscaping.
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JP Homes is a licensed ADU contractor in Southern California, serving Los Angeles, Orange County, Riverside & San Bernardino. They offer full-service ADU construction including detached units, garage conversions & more.
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WM Construction is a licensed ADU contractor in Los Angeles offering full-service builds, from site assessment and design to permitting and post-construction support, helping homeowners add granny flats, garage conversions, and in-law suites compliantly.
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The ADU Pro® is a licensed ADU contractor in Chino, CA, serving Fontana and Southern California. Specializing exclusively in ADU construction, they offer detached ADUs, garage conversions, and granny flats with a lifetime transferable warranty.
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R Remodeling is a trusted ADU contractor in Whittier, specializing in accessory dwelling units for added living space or rental income. Experienced in detached ADUs, they manage projects from consultation to completion with minimal property disruption.
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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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B&A Construction Inc. is a licensed general contractor in Manteca, CA, with 35 years of experience. Services include ADU construction, garage conversions, kitchen & bathroom remodeling, and room additions across San Joaquin and Central Valley counties.
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All Inclusive ADU is a licensed ADU contractor serving Orange, Riverside, Los Angeles & San Diego Counties. They offer full-service ADU construction including detached ADUs, garage conversions & JADUs with fixed pricing and a 365-day warranty.
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.