Detached ADUs (backyard cottages, granny flats) are standalone units adding rental income, family housing, or workspace. Costs range $100K–$350K. Cabal Construction guides homeowners through design, permits, and construction.
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San Diego Building and Renovation is a turnkey ADU contractor offering pre-approved floor plans, design, financing coordination, and construction for detached ADUs, garage conversions, and granny flats throughout San Diego, backed by parent compan... read more
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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House to Home is a trusted ADU builder in San Diego with 25+ years of experience. They specialize in granny flats, guest houses, garage conversions, and Junior ADUs, serving San Diego, Carlsbad, La Jolla & more.
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Expert ADU builder serving San Diego, including La Jolla, Chula Vista & Encinitas. Full-service accessory dwelling unit construction: planning, design & permitting. In-house team ensures quality granny flats & backyard cottages built t... read more
KSH Construction begins each project with a Discovery Call to discuss pricing, timelines, and fit, followed by an in-home consultation where the team measures the space and identifies structural, plumbing, or electrical constraints.
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Stel Builders, a San Diego ADU contractor, designs and builds detached, attached, and garage conversion ADUs. This design-build firm handles permitting, zoning, and construction, offering in-law suites, granny flats, and multigenerational layouts ... read more
Lusso Design & Build is a licensed San Diego ADU contractor specializing in ADUs and JADUs. They handle design, permits, and construction, ensuring compliance with California regulations while helping homeowners add rental income or flexible l... read more
3 Day Kitchen & Bath is a trusted ADU contractor in San Diego offering full-service accessory dwelling unit construction. From garage conversions to detached ADUs, they manage every project phase with a structured, professional approach.
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Valley Habitats Remodeling, a San Diego-based remodeling company, specializes in ADUs, garage conversions, in-law suites, and home remodels. Their craftsmanship-focused approach ensures durable, thoughtfully integrated additions that enhance prope... read more
Nestadu is a full-service ADU builder offering custom site-built and prefab ADUs. Site-built units start at $400/sqft; prefab models from $115K. They handle design, permitting, and construction, plus financing guidance including HELOCs and grants.... read more
First Choice Home Builders is a licensed San Diego ADU contractor with 15+ years of experience. They offer full-service ADU construction, including detached ADUs, garage conversions, and JADUs, with permit handling and flexible financing options.<... read more
Homeowners across the San Diego area looking to expand their living space or create a rental opportunity turn to the trusted San Diego Builders at The Avalon Company. With more than three decades of experience, they specialize in designing and con... read more
Bonita is a charming, unincorporated community located in San Diego County, nestled between Chula Vista and National City. Because Bonita is unincorporated, ADU projects here fall under the jurisdiction of the San Diego County Department of Planning and Development Services (PDS) rather than a city planning department. This is a critical distinction that experienced ADU contractors in Bonita, CA must navigate carefully. Working with a contractor who understands county-level permitting processes is essential for a smooth and compliant build.
Since Bonita operates under San Diego County's zoning and building codes, ADU contractors must comply with the county's specific regulations. Key rules include:
Hiring a local ADU contractor familiar with Bonita and San Diego County regulations can save homeowners significant time and money. Experienced contractors understand the county's permitting portal, inspection schedules, and any local nuances such as grading requirements common in Bonita's hilly terrain. The area's topography often means that site preparation, foundation work, and drainage planning require extra attention — all areas where a knowledgeable contractor adds real value.
Bonita's larger lot sizes and suburban character make it well-suited for a variety of ADU types. The most popular options include:
Whether you're looking to add rental income, house family members, or increase your property value, building an ADU in Bonita is a smart investment. Make sure to work with a licensed and insured ADU contractor who has direct experience with San Diego County's permitting process to ensure your project is completed on time, on budget, and fully up to code.