Accessory dwelling unit contractor — Berkeley, CA
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
A dedicated contractor manages the heavy lifting of your ADU project. This involves hiring skilled tradespeople, ordering materials, and ensuring that every phase of construction passes municipal inspections. You need a contractor when you want a single point of contact to oversee the transition from a vacant backyard area to a fully finished, livable home. They bridge the gap between initial architectural designs and the final move-in date for your new space.
Frequently asked in Berkeley
What is accessory dwelling unit rental in Berkeley?
What do accessory dwelling unit companies do?
Accessory dwelling unit companies offer comprehensive services for creating ADUs. They handle everything from initial design and architectural plans to navigating Berkeley's permitting process and managing the construction. These companies ensure that your ADU is built to code, on time, and within budget. They are experts in maximizing space and functionality for your specific property needs.
What makes an ADU affordable?
Affordable ADU options often involve utilizing existing structures, like garage conversions or basement remodels. Choosing simpler designs and standard finishes can also reduce costs. Prefabricated ADUs can sometimes be more budget-friendly due to factory efficiencies. In Berkeley, working with professionals who understand cost-effective solutions is key to achieving an affordable ADU. We help you find them.
What are prefabricated accessory dwelling units?
What should I consider for a backyard accessory dwelling unit?
For a backyard accessory dwelling unit in Berkeley, consider your lot size and setbacks. Ensure there's enough space for the unit itself, plus any necessary access pathways. Think about utility connections for water, sewer, and electricity. The pros will help you determine the best placement to maximize usable yard space while meeting all zoning requirements. They'll also consider your desired features for the unit.
What is ADU housing?
ADU housing refers to the concept of adding accessory dwelling units to existing residential properties. It's a strategy to increase housing density without building large apartment complexes. These units can be attached to the main house or detached in the backyard. ADU housing in Berkeley provides opportunities for multi-generational living or rental income.
What is the accessory dwelling unit permit process in Berkeley?
Also serving nearby: Richmond · Oakland · Daly City · Vallejo · Concord
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Berkeley — population 118,962; about 11,403 residents per square mile across 10.4 sq mi. ZIP codes covered include 94701, 94702, 94703, 94704, 94705, 94707, 94708, 94709.
Neighborhoods served in Berkeley: Elmwood, Gourmet Ghetto, West Berkeley, North Berkeley, South Berkeley, Claremont — and every surrounding area.
Areas we serve
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