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Adu construction — San Francisco, CA

Looking for adu construction in San Francisco, CA? Call AccessoryDwellingUnit Experts for a contact a provider — no obligation. Licensed adu builders serve San Francisco 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 major project, and the final bill depends on a few key things. Site prep is a big factor; if your land is sloped or needs extensive utility connections, costs go up. The materials you choose—from siding to kitchen finishes—also change the math significantly. Whether you’re building a detached unit or converting an existing garage shifts the permit requirements and structural work needed. We provide exact pricing confirmed free on the call.

About this service

This is the physical process of building a secondary unit, which requires coordinating contractors, electricians, and plumbers. You need professional construction services when you are ready to break ground on your design. Costs are driven by the complexity of the foundation, interior finish levels, and site grading requirements. Exact pricing confirmed free on the call.

Frequently asked in San Francisco

What are the rules for an accessory dwelling unit for rent in San Francisco?

In San Francisco, accessory dwelling units for rent must comply with local housing ordinances, including tenant protection laws and rent control regulations if applicable. The ADU must be a safe and legal dwelling unit, meeting all building codes. The unit needs to have its own kitchen and bathroom. It's essential to understand these rules before renting out your ADU. The pros can advise on compliance.

How do I find accessory dwelling unit builders near me in San Francisco?
What is involved in getting an ADU estimate in San Francisco?

Getting an ADU estimate in San Francisco typically involves a consultation where you discuss your desired unit size, type, and features. The contractor will then assess your property's site conditions and any unique challenges presented by San Francisco's urban landscape. This information allows them to provide a detailed quote. It covers materials, labor, and permits. Call us to start the process.

What does an accessory dwelling unit mean for property owners in San Francisco?

For property owners in San Francisco, an accessory dwelling unit (ADU) means adding a secondary, independent living space on their lot. This can be a detached backyard unit, an addition to the existing home, or a conversion of unused space like a garage. ADUs offer increased housing options and potential rental income. They are a valuable addition to urban properties.

What are the requirements for ADU housing in San Francisco?

ADU housing in San Francisco must meet specific requirements set by the city's planning department, including regulations on size, setbacks, and lot coverage. The unit must contain its own kitchen and bathroom facilities. Permitting is mandatory. The goal is to ensure ADUs are safe, legal, and integrate well with the neighborhood. The pros are familiar with these rules.

Where can I find an ADU near me in San Francisco?
What's the typical process for accessory dwelling unit permits in San Francisco?

Also serving nearby: Daly City · Richmond · San Mateo · Berkeley · Oakland

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

Service area details

808,988residents
17,323per sq mile
8ZIP codes served

Serving all of San Francisco — population 808,988; about 17,323 residents per square mile across 46.7 sq mi. ZIP codes covered include 94102, 94103, 94104, 94105, 94107, 94108, 94109, 94110.

Neighborhoods served in San Francisco: The Mission District, Pacific Heights, North Beach, The Castro, Outer Sunset — and every surrounding area.

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