Cost to build accessory dwelling unit

Looking for cost to build accessory dwelling unit in Long Beach, CA? Call AccessoryDwellingUnit Direct for a contact a provider — no obligation. Licensed adu builders serve Long Beach 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

The expense of building an ADU varies based on site preparation, whether you need to run new sewer or electrical lines, and the level of interior customization you choose. Larger custom builds naturally require more materials and labor than simpler conversions. We provide exact pricing confirmed free on the call.

Frequently asked in Long Beach

What are the disadvantages of ADUs in Long Beach?

Potential disadvantages include the upfront construction costs and the complexities of permitting in a busy city like Long Beach. You'll also want to consider how it might affect your property's aesthetics and your relationship with neighbors. Careful planning can mitigate most issues.

How much does an ADU cost in Long Beach?

What are the rules for ADUs in Long Beach?

Long Beach has specific ADU regulations concerning lot size, setbacks, parking requirements, and maximum unit size. It's crucial to adhere to these rules to ensure your ADU is permitted and built to code. We can help clarify these for you.

Is an ADU allowed in Long Beach?

Yes, accessory dwelling units are permitted in Long Beach, with regulations designed to encourage their development. As long as your proposed ADU meets all the city's requirements, you should be able to move forward. Let's confirm your project's eligibility.

What are the rules for ADU in Long Beach?

The rules for ADUs in Long Beach cover essential aspects like ensuring adequate off-street parking and respecting property line setbacks. You'll also need to comply with California state ADU laws. We can guide you through these requirements.

While it's a great resource for California residents, it's important to verify if your Long Beach project qualifies. We can help you find out more.

Also serving nearby: Carson · Compton · Westminster · Norwalk · Huntington Beach

All cities in California →

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

Service area details

449,468residents

8,870per sq mile

8ZIP codes served

Serving all of Long Beach — population 449,468; about 8,870 residents per square mile across 50.7 sq mi. ZIP codes covered include 90801, 90802, 90803, 90804, 90805, 90806, 90807, 90808.

Neighborhoods served in Long Beach: Belmont Shore, Lakewood Village, Alamitos Beach, Bixby Knolls, Naples — and every surrounding area.