An accessory dwelling unit (ADU) is a secondary home on a single-family lot with kitchen, bath, and sleeping space. Xavier Design Group helps Southern California homeowners build ADUs with trusted contractors and transparent pricing.
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Potato Construction Inc., based in Rosemead, CA, is a licensed ADU contractor with 15+ years of experience. They build detached ADUs, garage conversions, attached ADUs, and JADUs across the San Gabriel Valley and greater Los Angeles area.
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Bergstrom Construction Inc. builds custom ADUs in Apple Valley, Victorville & Hesperia. Serving San Bernardino County, they offer in-law suites, backyard cottages, home offices & garage additions tailored to High Desert homeowners.
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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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A1 Home Builder (CA License #885624) is a Lancaster-based ADU contractor and residential builder serving the Antelope Valley since 2006, specializing in garage conversions, detached ADUs, and new single-family home construction.
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Peck General Construction builds ADUs in Orange County, Los Angeles & Inland Empire. Services include garage conversions, detached backyard cottages & granny flats. Full-service from permits to final inspection under a Design-Build model.
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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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Paramount Manufactured Sales in Riverside offers Skyline Homes-built ADUs for Southern California homeowners in LA, Orange, Riverside, San Bernardino & San Diego Counties. Models range from 479–849 sq ft. California law now allows detached ADUs up to 1,200 sq ft.
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ADU Professionals, Corona CA, builds custom Accessory Dwelling Units since 1999. Offering floor plans from 500–1,200 sq ft, including detached ADUs, granny flats & in-law suites for rental income or multigenerational living.
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Avica Construction & Development Inc is a licensed LA-based ADU contractor building detached ADUs, garage conversions, attached ADUs & JADUs across Los Angeles, Orange County & San Bernardino County, managing design, permits & construction.
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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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Pasadena Master ADU Builder is a top ADU contractor in San Gabriel Valley, offering detached ADUs, garage conversions, and JADUs. With 20+ years experience, 150+ projects, and 98% satisfaction, they deliver compliant, high-quality builds boosting property value by 20–30%.
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Willbii is a California ADU contractor specializing in granny flats, garage conversions, and in-law suites. They guide homeowners from consultation to construction, handling permits and design. ADUs can generate up to $5,000/month in rental income.
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Fontana General Contractors builds custom ADUs, including detached units, garage conversions, and in-law suites. They handle permits, zoning, and full construction management, helping property owners add value and flexible living space.
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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.
read moreHesperia, located in San Bernardino County within California's High Desert region, presents unique opportunities and challenges for ADU contractors. With its rapidly growing population, affordable land compared to coastal cities, and larger lot sizes typical of the Victor Valley area, Hesperia has become an increasingly attractive location for homeowners looking to add Accessory Dwelling Units (ADUs). The city's desert climate, with extreme heat in summer and occasional freezing temperatures in winter, means that experienced local ADU contractors must account for specific building material requirements and energy efficiency standards suited to this environment.
ADU contractors working in Hesperia must navigate regulations set by both the City of Hesperia and San Bernardino County guidelines, as well as comply with California state ADU laws. Under California's updated ADU laws (AB 68, AB 881, and SB 13), homeowners in Hesperia can benefit from streamlined permitting processes. Key regulations local contractors must be aware of include:
Hiring a licensed ADU contractor familiar with Hesperia is essential for a smooth building process. Local contractors understand the specific soil conditions of the High Desert, including expansive soils that may require specialized foundation work. They are also well-versed in the city's building department procedures, helping homeowners avoid costly delays. Additionally, Hesperia's desert climate demands expertise in energy-efficient construction, proper insulation, and HVAC systems capable of handling temperature extremes.
Given Hesperia's characteristically larger residential lots, detached ADUs are among the most popular options. Homeowners frequently choose:
When searching for ADU contractors in Hesperia, California, always verify that your contractor holds a valid California Contractor's License (CSLB) and carries proper insurance. Request references from previous ADU projects in the High Desert area and ensure they have direct experience with Hesperia's permitting office. A qualified local contractor will guide you through design, permitting, construction, and final inspection, maximizing your property's value in this growing desert community.