Adu building — Oakland, CA | AccessoryDwellingUnit Solutions

Looking for adu building in Oakland, CA? Call AccessoryDwellingUnit Solutions for a contact a provider — no obligation. Licensed adu builders serve Oakland 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

Frequently asked in Oakland

What is an ADU unit?

An ADU unit, or accessory dwelling unit, is a secondary housing unit on a single-family residential lot. It's a completely separate living space with its own kitchen, bathroom, and entrance. ADUs can be attached to the main home or be a detached structure, like a backyard cottage. We build these in Oakland.

Where can I find local ADU services in Oakland?

What are accessory dwelling unit companies like?

Accessory dwelling unit companies like ours manage the entire ADU construction process. This includes design, obtaining permits, and building the unit. We focus on quality craftsmanship and clear communication. Our aim is to make building your ADU in Oakland a straightforward experience.

What does accessory dwelling unit mean?

What is the ADU cost in Oakland?

The ADU cost in Oakland depends on factors like the unit's size, design complexity, and chosen materials. Site preparation and utility hookups also influence the price. We provide a free, detailed quote after assessing your property. Call us for an accurate cost estimate.

Are backyard accessory dwelling units common in Oakland?

How much does a prefab ADU cost?

The cost of a prefab ADU can vary widely based on size, features, and the manufacturer. These units are built in sections off-site, which can sometimes offer cost savings and faster construction. We can help you explore prefab options and provide estimates. Contact us for details.

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

All cities in California →

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

Service area details

436,504residents

7,799per sq mile

8ZIP codes served

Serving all of Oakland — population 436,504; about 7,799 residents per square mile across 56.0 sq mi. ZIP codes covered include 94601, 94602, 94603, 94604, 94605, 94606, 94607, 94609.

Neighborhoods served in Oakland: Rockridge, Montclair, Temescal, Jack London Square, Piedmont Avenue — and every surrounding area.