Accessory dwelling unit companies

Looking for accessory dwelling unit companies in San Diego, CA? Call AccessoryDwellingUnit Direct for a contact a provider — no obligation. Licensed adu builders serve San Diego 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

ADU companies provide end-to-end solutions, often integrating design, permitting, and construction under one roof. You need to engage a company when you want a streamlined experience and want to avoid the stress of hiring separate architects and builders. These companies handle the coordination of the entire project, ensuring that every phase of development transitions smoothly while keeping you updated on the progress and budget status of your new unit.

Frequently asked in San Diego

What are the disadvantages of ADUs?

How much does an ADU cost in California?

What are the rules for ADUs in California?

California has state-level laws that streamline ADU development, but local San Diego regulations still apply. These cover aspects like minimum lot size, height limits, and setback requirements. Ensuring your project meets all these criteria is vital for approval. Get expert advice with a free call today.

Is ADU allowed in Maryland?

What are the rules for ADU in California?

California's ADU laws, often referred to as 'by-right' provisions, aim to simplify the process by setting statewide standards for size, height, and setbacks, reducing local discretionary review. However, San Diego still has its own specific requirements that must be met. Get expert advice with a free call today.

Also serving nearby: El Cajon · Chula Vista · San Marcos · Escondido · Carlsbad

All cities in California →

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

Service area details

1,388,320residents

4,257per sq mile

8ZIP codes served

Serving all of San Diego — population 1,388,320; about 4,257 residents per square mile across 326.1 sq mi. ZIP codes covered include 92101, 92102, 92103, 92104, 92105, 92106, 92107, 92108.

Neighborhoods served in San Diego: La Jolla, North Park, Coronado, Hillcrest, Point Loma — and every surrounding area.