Looking for accessory dwelling unit services in Los Angeles, CA? Call AccessoryDwellingUnit Services for a contact a provider — no obligation. Licensed adu builders serve Los Angeles 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 investment. The final figure depends heavily on whether you choose a prefab unit or a custom build from the ground up. Site conditions are another major factor; if your property requires extensive grading, utility trenching, or foundation work, costs will climb. You also have to consider your choice of finishes, like high-end appliances or custom cabinetry. Navigating local permit fees and impact assessments also adds to the total.

About this service

These services cover the end-to-end process of adding a secondary home to your property. This includes initial zoning checks, architectural design, permit filing, and final construction. You need these services when you want to create a separate living space for family, guests, or as a rental unit, but don’t want to manage the complex legal and structural requirements on your own.

Frequently asked in Los Angeles

What are the disadvantages of ADUs in Los Angeles?

Potential disadvantages of ADUs in Los Angeles can include navigating local zoning and building codes, which, while generally favorable, still have specific requirements. You might also face site constraints like lot size or access, especially in densely populated areas. Discussing these with local pros is key.

How much does an ADU cost in Los Angeles?

What are the rules for ADUs in California?

Is ADU allowed in Maryland?

Accessory Dwelling Units are permitted in Maryland, but regulations vary significantly by county and municipality. Some areas have more restrictive rules than others. If you're considering an ADU in Maryland, it's crucial to research the specific local ordinances. Pros in California can detail those rules.

This initiative aims to increase the availability of affordable housing. While this grant is specific to California, discussing your project with local experts can uncover any relevant programs.

What are the rules for ADU in California?

California has state laws that encourage ADUs, but local jurisdictions maintain their own specific requirements. These often cover size limits, setbacks, and parking. Professionals in California can clarify these rules for your specific city, ensuring compliance.

Also serving nearby: Santa Monica · Inglewood · South Gate · Compton · Torrance

All cities in California →

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

Service area details

3,820,914residents

8,120per sq mile

8ZIP codes served

Serving all of Los Angeles — population 3,820,914; about 8,120 residents per square mile across 470.5 sq mi. ZIP codes covered include 90001, 90002, 90003, 90004, 90005, 90006, 90007, 90008.

Neighborhoods served in Los Angeles: Hollywood, Beverly Hills, Pasadena, Santa Monica, Long Beach, Downtown LA — and every surrounding area.