Last updated: September 24, 2026
What affects the price
Building an ADU is a custom project, so costs vary based on your specific choices. Site conditions are the biggest factor; if your land requires significant grading, utility extensions, or foundation work, those expenses add up quickly. Choosing high-end finishes, custom cabinetry, or complex roof lines will also push the budget higher compared to a standard design. Prefabricated units often offer predictable costs, while custom site-built structures allow for more flexibility but can be harder to estimate upfront. Exact pricing confirmed free on the call.
About this service
Using an ADU as a rental involves converting a space on your property into a legal unit you can lease to tenants. This provides a steady stream of passive income, but it requires compliance with local landlord-tenant laws and ADU-specific zoning rules regarding long-term or short-term rentals. You need this service when you want to maximize your property's financial potential. Costs depend on the level of interior finish and separate utility metering. Exact pricing confirmed free on the call.
Frequently asked in San Jose
What are the essential requirements for building an ADU in San Jose?
How much does an ADU typically cost in San Jose?
Where can I find reputable ADU builders in the San Jose area?
What permits are needed for an ADU in San Jose?
Can I get grants for building an accessory dwelling unit in San Jose?
What services do ADU companies offer in San Jose?
ADU companies in San Jose typically offer a comprehensive suite of services, from initial design consultation and site assessment to obtaining permits and managing the entire construction process. This includes architectural planning, structural engineering, and navigating the complex local permitting requirements. They handle all aspects of construction, ensuring compliance with San Jose's building codes and zoning ordinances. Their expertise aims to make the ADU development process as smooth and efficient as possible for homeowners.
What are the key differences between ADU types in San Jose?
Also serving nearby: Burbank · Santa Clara · Sunnyvale · Fremont · Hayward
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of San Jose — population 969,655; about 5,449 residents per square mile across 177.9 sq mi. ZIP codes covered include 95025, 95101, 95103, 95106, 95108, 95109, 95110, 95111.
Neighborhoods served in San Jose: Willow Glen, Cambrian Park, Evergreen, Almaden Valley, Berryessa — and every surrounding area.
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