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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Sequoia Homes & Backyard Bungalows offer affordable ADU builder services in Carlsbad, CA. From granny flats to in-law suites, they handle design, permits, financing & installation. Projects completed in as little as 8 weeks.
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MyADU4Less is a Southern California ADU builder specializing in prefabricated accessory dwelling units. Offering models from 160–1,200 sq ft, they handle design, permitting, and construction. CalHFA grants up to $40,000 may apply.
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Proteus Homes is a custom home and ADU builder with 30+ years of experience in the Southwest US. They offer full-service ADU construction, including design, permitting, and panelized off-site fabrication, with move-in-ready homes in under three months.
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Capital Construction Inc. is an experienced ADU contractor building detached ADUs, in-law suites, granny flats, and rental units. Licensed, bonded, and insured, they handle permitting, design, and construction while respecting budgets and timelines.
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Block Contracting specializes in crafting the best Accessory Dwelling Units (ADUs) in Oceanside, CA. Our designs are meant to enhance your property’s value and functionality. Whether you’re seeking a modern guest house, a stylish rental unit, pool house, or a versatile space for family.
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Streamline Design Group offers ADU design and permitting in San Diego, covering detached, attached, JADU, garage conversions, and multi-family units. Referenced in the State ADU handbook, they deliver permit-ready plans at 40–60% less than architect fees.
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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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PacGen Construction is a Temecula-based ADU contractor specializing in granny flats, casitas, and in-law suites. They offer full design-build services, permitting assistance, and custom ADU construction for homeowners seeking rental income or extra 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.
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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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An ADU is a secondary residential unit on the same property as a primary home. JL Biber Construction Inc., a licensed ADU builder in Riverside, California, offers full-service garage conversions, granny flats, and detached ADU construction.
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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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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.
read moreAnza is a small, unincorporated community located in Riverside County, nestled in the mountains of the Santa Rosa Plateau at an elevation of approximately 4,000 feet. Unlike incorporated cities, Anza falls under Riverside County jurisdiction, meaning ADU contractors must navigate county-level regulations rather than municipal codes. The rural character of Anza, combined with its unique terrain, well water systems, and septic infrastructure, creates a distinctive set of challenges and opportunities for homeowners looking to build an Accessory Dwelling Unit.
Since Anza is governed by Riverside County Land Use Services, ADU contractors must comply with the county's ADU ordinance, which aligns with California state law under AB 68, SB 9, and AB 2221. Key regulatory considerations include:
One of the most significant factors ADU contractors face in Anza is the lack of municipal water and sewer systems. Most properties rely on private wells and septic systems. Before breaking ground, contractors must assess whether the existing septic system has adequate capacity to support an additional dwelling unit. In many cases, a septic system expansion or upgrade is required, which must be approved by the Riverside County Department of Environmental Health. Similarly, well capacity evaluations may be necessary to ensure sufficient water supply for the new unit.
Hiring an experienced ADU contractor familiar with Anza and Riverside County is essential for a smooth project. Local contractors understand the specific soil conditions, fire hazard severity zones, and mountain climate considerations that affect construction methods and materials. Anza falls within a High or Very High Fire Hazard Severity Zone, which means ADU construction must comply with CAL FIRE building standards, including ember-resistant vents, fire-rated materials, and defensible space requirements.
Due to the rural location and infrastructure complexities, ADU projects in Anza may cost more and take longer than in urban areas. Homeowners should budget for:
Working with a licensed, insured ADU contractor who specializes in rural Riverside County projects ensures compliance, quality construction, and a smoother path to adding valuable living space on your Anza property.