Where do you work?
Our headquarters is at 243 Prospect Street in La Jolla, California. We serve all of San Diego County — including La Jolla, Del Mar, Encinitas, Carlsbad, Oceanside, and Chula Vista — and continue north through Orange County.
Are you a licensed contractor?
Yes. Troia Construction holds California Contractors State License Board (CSLB) license #1151054. We are a fully licensed General B contractor qualified to perform residential and commercial construction across California.
How long do ADU permits take in San Diego County?
Most jurisdictions now target 60-day reviews, but coastal overlays or design review boards can extend timelines. We shepherd submittals, respond to plan check comments, and keep you informed of every milestone.
How are ADU utilities and tie-ins handled?
We coordinate electrical load calculations, gas sizing, sewer tie-ins, and water pressure requirements. Our field teams execute trenching, conduit runs, and service upgrades so your ADU integrates cleanly with the primary residence.
Do ADUs require additional parking?
State law has relaxed parking mandates when your property is within a half-mile of public transit or includes a garage conversion. We verify local ordinances and, when required, plan compliant on-site spaces without compromising design.
What setbacks should I expect for an ADU?
Detached ADUs typically require four-foot side and rear setbacks, while attached units follow primary-structure standards. We confirm zoning overlays early so your design maximizes the allowable building envelope.
How do coastal overlays impact ADU approvals?
Projects inside the California Coastal Zone can trigger extra reviews. We collaborate with planners, prepare supplemental coastal documentation, and manage hearings to keep your permit on track.
How long does an ADU build usually take?
Construction durations range from four to seven months depending on scope and site access. We build detailed schedules, maintain owner-level oversight, and communicate weekly progress updates.
Can you help me understand ADU financing options?
We guide clients through lender conversations, highlight construction-to-permanent loans, and share best practices for leveraging home equity while keeping carrying costs predictable.
Do you only build ADUs?
ADUs are a core specialty, but we also deliver custom residences, major remodels, multifamily improvements, and boutique commercial builds. We frequently partner with clients on targeted trade scopes such as framing, foundations, roofing, and siding.
How hands-on is the owner?
The owner attends weekly site walks, leads subcontractor coordination, and handles key client updates personally. Direct involvement from preconstruction through turnover is how we maintain accountability on every project.
Do you work with outside design teams?
Absolutely. We collaborate with architects, interior designers, and engineers throughout California and can recommend partners suited to your project's scope and aesthetic.
Do you offer free estimates?
Yes. We provide free initial consultations and project estimates. Submit your project details through our quote form or call us directly at +1 571-723-7461.
How much does it cost to build an ADU in San Diego?
ADU costs in San Diego vary by type and size. Garage conversions typically range from $100,000 to $180,000. Attached ADUs run $150,000 to $300,000. Detached ADUs and backyard cottages range from $200,000 to $400,000+. Factors include square footage, site conditions, finishes, and permit fees. San Diego County offers fee waivers that can save $8,000–$30,000. Contact us for a free, detailed cost estimate for your specific property.
What is a JADU and can I build one in San Diego?
A Junior Accessory Dwelling Unit (JADU) is a small living space of up to 500 square feet created within the walls of an existing home. JADUs are allowed in San Diego and can be built in addition to a standard ADU on the same lot. They require no additional parking and have a streamlined permitting process. JADUs are an affordable way to add rental income or multigenerational living space.
Can I sell my ADU separately from my home in San Diego?
Yes. San Diego has adopted AB 1033, a California law that allows accessory dwelling units to be sold separately as condominiums. This means your ADU can be an independent real estate asset. Troia Construction builds AB 1033-compliant ADUs so you retain the flexibility to sell your unit independently if you choose.
Are there ADU fee waivers available in San Diego?
Yes. San Diego County waives many impact and connection fees for qualifying ADU projects, potentially saving homeowners $8,000 to $30,000. The San Diego ADU Bonus Program also allows additional ADUs per lot in exchange for deed-restricted affordable units. We help every client identify and apply for all available fee reductions.
What San Diego neighborhoods are best for building an ADU?
ADUs can be built across all of San Diego County. High-demand rental neighborhoods like North Park, Hillcrest, Pacific Beach, and Mission Hills offer strong rental income potential. Coastal areas like La Jolla, Del Mar, and Encinitas require coastal overlay expertise. Suburban communities like Poway, Escondido, La Mesa, and Chula Vista often have larger lots ideal for detached ADUs and backyard cottages.
What is the difference between a granny flat, casita, and ADU?
They are all names for the same thing — an accessory dwelling unit. “Granny flat” and “mother-in-law suite” are common terms for ADUs used for family members. “Casita” and “backyard cottage” often refer to detached ADUs. “Guest house” and “in-law apartment” are also used interchangeably. Regardless of what you call it, San Diego zoning law treats them all as ADUs with the same regulations and permitting requirements.
Can I use my ADU as a rental property in San Diego?
Yes. ADUs in San Diego can be rented as long-term residences. Many homeowners build ADUs specifically for rental income, which can range from $1,500 to $3,500+ per month depending on size, location, and finishes. San Diego's strong rental market makes ADUs one of the best investments for property owners looking to generate passive income.