North County ADU Construction is a local ADU contractor serving north San Diego County. They specialize in garage conversions, JADUs, detached ADUs, and prefab installs. With 500+ builds and a 96% satisfaction rate, they handle design, permitting, and construction.
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Suncoast Construction Inc. is a licensed ADU contractor in Oceanside, CA, building detached ADUs, garage conversions, JADUs & attached units per Oceanside's 2022 ADU Ordinance. No short-term rentals permitted.
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Falcon Builders Group is a San Diego ADU contractor specializing in detached ADUs, garage conversions, JADUs, in-law suites, and casitas. They guide homeowners through design, permitting, and construction to add functional, value-boosting living space.
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CSL Quality Construction is a trusted ADU contractor in San Diego County, offering full-service design, permits, construction, and renovations. ADUs can boost property value by 20–30% and generate rental income.
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Bastion Structures offers modular concrete masonry homes, ADUs, and tiny houses that are fire-, mold-, and termite-resistant. Models range from 305 SF studios to 3,955 SF homes, ideal for California properties seeking durable, weatherproof living solutions.
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Forever Builders Inc is San Diego's premier ADU contractor, specializing in granny flats, in-law suites, and detached accessory dwelling units. They handle design, permitting, construction, and finishing, delivering high-quality, custom ADU solutions for homeowners.
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ADU San Diego is a licensed contractor specializing in accessory dwelling unit design and construction across San Diego County. Services include garage conversions, detached ADUs, and JADUs, with costs ranging from $100,000–$400,000.
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In N Out Builders & Home Remodeling offers full-service ADU design and construction in San Diego County, handling detached ADUs, garage conversions, granny flats, and JADUs, managing permits, planning, and builds under one roof.
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BNC Builders Inc. is a San Diego County ADU contractor offering detached, attached, garage conversion & JADU construction. Services include permit management, custom design & financing assistance.
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TrueBuild ADU is an owner-operated ADU builder serving San Diego County, offering detached ADUs, garage conversions, and JADUs. Known for transparent pricing and hands-on service, they deliver quality construction without corporate markups.
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HSP ADU Builders is a California ADU contractor specializing in detached ADUs, garage conversions, JADUs, and in-law suites. They guide homeowners through design, permitting, and construction of accessory dwelling units.
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Dr Build ADU Specialist's mission is to build affordable high-quality Accessory Dwelling Units (ADU’s/Granny Flats) that the average person can afford.
Always providing the best with our friendly, understanding, bilingual builders and sales personal.
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Crest Backyard Homes is San Diego's trusted ADU builder, specializing in prefab, detached ADUs, granny flats & garage conversions. Their all-inclusive team guides homeowners from design to completion, ensuring code-compliant, high-quality accessory dwelling units.
read moreSan Diego has become one of the most active markets for Accessory Dwelling Units (ADUs) in the entire state of California. Thanks to its high property values, year-round desirable climate, and a persistent housing shortage, homeowners across neighborhoods like North Park, Ocean Beach, and Chula Vista are turning to ADU contractors in San Diego to maximize their property's potential. The city has embraced state-level ADU reform laws, making it easier than ever to build a secondary unit on your property.
Working with an experienced San Diego ADU contractor is essential because local regulations can be complex. San Diego follows California state law, which allows ADUs on most single-family and multi-family residential lots. Key rules include:
San Diego has streamlined its ADU permitting process through the Development Services Department (DSD). The city offers pre-approved ADU plans, which can significantly reduce approval timelines. A qualified ADU builder in San Diego will handle the permit application, architectural drawings, structural engineering, and coordination with city inspectors. Typical permit approval times in San Diego range from a few weeks for pre-approved plans to several months for custom designs.
Choosing the right contractor is critical to a successful ADU project. Reputable ADU contractors in San Diego will offer end-to-end services, including design, permitting, construction, and final inspection. When evaluating contractors, look for:
The cost to build an ADU in San Diego typically ranges from $150,000 to $350,000 or more, depending on size, type, and finishes. However, given San Diego's strong rental market — with average rents among the highest in California — homeowners can often see a strong return on investment. A well-built ADU can generate $1,500 to $3,000+ per month in rental income, making it a smart long-term investment in one of America's most competitive real estate markets.