Cost to build accessory dwelling unit

Looking for cost to build accessory dwelling unit in Long Beach, CA? Call AccessoryDwellingUnit Experts 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 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

Building an ADU involves costs for permits, site prep, foundation, framing, plumbing, and electrical work. Prices fluctuate based on whether you choose a custom design or a pre-planned layout, as well as the complexity of connecting to existing city utilities. Exact pricing confirmed free on the call.

Frequently asked in Long Beach

What are the disadvantages of ADUs in Long Beach?

Potential disadvantages of ADUs in Long Beach include the impact on your existing backyard space and potential for increased utility bills. Navigating the city's specific building codes and permit requirements can also be complex. However, the benefits of increased rental income and property value often outweigh these concerns. Discussing your specific situation with a local pro is recommended.

How much does an ADU cost in Long Beach?

The cost to build an ADU in Long Beach varies widely. Key factors include the square footage, the quality of materials and finishes selected, and the complexity of the site work. Things like foundation requirements or utility connections specific to your lot can also influence the price significantly. A personalized quote is the best way to understand the investment.

What are the rules for ADUs in Long Beach?

Long Beach has detailed rules for ADUs, covering aspects like minimum lot size, setback requirements, and parking regulations. It's crucial to understand how these rules apply to your specific property address. The city's planning department outlines these regulations. We can help you connect with professionals who are experts in navigating Long Beach's ADU ordinances.

Is an ADU allowed in Long Beach?

Yes, ADUs are permitted in Long Beach, but they must comply with specific city ordinances. These rules dictate size, placement, and other design elements. Your property's zoning and lot size will determine eligibility. To confirm feasibility for your specific location, it's best to consult with a local ADU specialist.

What are the rules for ADUs in California?

Eligibility often depends on income verification and project specifics. Availability and application processes can change, so it's important to check current program details. We can help you find professionals who can advise on this.

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

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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, Naples, Bixby Knolls, Lakewood Village, Downtown Long Beach — and every surrounding area.