Affordable accessory dwelling unit

Looking for affordable accessory dwelling unit in San Jose, CA? Call AccessoryDwellingUnit Solutions 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 several moving parts that shape your total budget. The biggest factor is whether you choose a prefabricated unit or a custom build on-site. Site preparation is also significant; if your land requires extensive grading, utility trenching, or foundation work, costs will climb. Your choice of finishes—like kitchen cabinetry, flooring, and siding materials—also shifts the bottom line. We help you navigate these variables to find a setup that fits your property. Exact pricing confirmed free on the call.

About this service

Building an affordable unit often comes down to choosing efficient designs and pre-planned layouts rather than full custom builds. By simplifying utility connections and minimizing complex excavation, you can keep your project within a reasonable budget. While we aim to make the process accessible, the final bill depends on your specific site conditions. Exact pricing confirmed free on the call.

Frequently asked in San Jose

What are the disadvantages of ADUs in San Jose?

How much does an ADU cost in California?

What are the rules for ADUs in California?

California has statewide ADU laws designed to streamline approvals, but local jurisdictions like San Jose may have additional specific requirements. These often pertain to setbacks, height limits, and parking. You'll need to ensure your plans comply with both state and local ordinances. We can help you navigate this.

Is an ADU allowed in Maryland?

This service focuses on California cities like San Jose. Regulations for ADUs vary significantly by state and even by city. You'll need to consult local authorities for rules in Maryland or any other state outside of our service area.

While there have been grant programs in California for ADUs, specific details and availability can change. These grants often target specific income levels or types of ADUs. It's important to research current programs directly through state or local housing agencies. We can't arrange grants, but we can get you a quote.

What are the rules for ADU in California?

California's ADU laws generally permit ADUs on most single-family lots and some multi-family properties. Key provisions include relaxed parking requirements and limitations on owner occupancy. Local San Jose ordinances might add nuances. Understanding these rules is a great first step before calling for a quote.

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