Accessory dwelling unit permit cost

Looking for accessory dwelling unit permit cost in San Jose, CA? Call AccessoryDwellingUnit Direct 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 involves variables that shift your total investment. The footprint size and complexity of the architectural design are primary factors. Are you planning a detached unit that requires new utility trenching, or is this a garage conversion that uses existing plumbing? Site accessibility, soil conditions, and your choice of finishes—like luxury flooring versus standard options—also play significant roles. Permitting fees vary widely depending on your local municipality and current zoning requirements. Exact pricing confirmed free on the call.

About this service

Securing permits is a mandatory step that covers city review fees, impact fees, and inspections to ensure your build meets safety codes. These costs vary significantly by city and the scope of your specific project. Because local jurisdictions set their own fee structures, we assist you in estimating these expenses during our initial consultation. We ensure you have a clear picture of all regulatory requirements before you begin. Exact pricing confirmed free on the call.

Frequently asked in San Jose

What are the disadvantages of ADUs in San Jose?

Potential disadvantages in San Jose can include navigating complex city zoning laws and permit processes, which can sometimes be time-consuming. There's also the initial construction cost to consider. However, the benefits of increased property value and rental income often outweigh these challenges for many homeowners looking to maximize their space.

How much does an ADU cost in California?

What are the rules for ADUs in California?

California has state-level ADU laws that streamline approvals, but San Jose also has its own specific requirements regarding setbacks, lot coverage, and design. Generally, these laws aim to make ADUs easier to build. Understanding these local nuances is key to a successful project, and we can help clarify them.

Is an ADU allowed in San Jose?

Yes, ADUs are generally allowed in San Jose, with state laws encouraging their development. The city has specific ordinances that govern their placement, size, and design to ensure they integrate well into existing neighborhoods. We can help you understand exactly what's permitted on your property.

What is the accessory dwelling unit permit cost in San Jose?

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

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