Adu construction — San Jose, CA | AccessoryDwellingUnit Pros

Looking for adu construction in San Jose, CA? Call AccessoryDwellingUnit Pros for a contact a provider — no obligation. Licensed adu builders serve San Jose and the surrounding area, and you'll get straight answers on timing and what affects the price.

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

ADU construction is the hands-on phase where crews build your secondary home. This includes framing, electrical, plumbing, insulation, and interior finishes. You need this service after your designs are finalized and your permits are issued. The final price is influenced by the quality of materials, the speed of the build, and the difficulty of the terrain on your property. We manage these variables to keep things on track. Exact pricing confirmed free on the call.

Frequently asked in San Jose

What is the definition of an accessory dwelling unit (ADU) in San Jose?

What are the rules for a backyard accessory dwelling unit in San Jose?

Are accessory dwelling units a common housing option in San Jose?

Yes, accessory dwelling units (ADUs) are increasingly common and encouraged in San Jose as a solution for increasing housing supply. They offer homeowners a way to add rental income or accommodate family members. The city has streamlined some of its ADU regulations to facilitate their development. Professionals understand these evolving policies and can guide you through compliance.

What are the requirements for homes with in-law suites in San Jose?

What is considered ADU housing in San Jose?

What makes a good local ADU contractor in San Jose?

A good local ADU contractor in San Jose possesses in-depth knowledge of the city's specific building codes and zoning ordinances. They should have a proven track record of successfully completing ADU projects within the area. Experience in navigating the permitting process efficiently is also vital. The pros ensure your project is handled professionally and compliantly.

What is the best ADU for my property in San Jose?

Also serving nearby: Burbank · Santa Clara · Sunnyvale · Fremont · Hayward

All cities in California →

More on this: HUD ADU resources — ADU policy and financing research.

Service area details

969,655residents

5,449per sq mile

8ZIP codes served

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, Almaden Valley, Downtown San Jose, Japantown, Rose Garden — and every surrounding area.