How much does an ADU cost to build in Long Beach?

A detached ADU in Long Beach costs $220,000–$450,000 for 600–1,200 sq ft. Garage conversions run $90,000–$180,000, and JADUs cost $55,000–$110,000. Long Beach is slightly more affordable than LA proper.

What are the ADU rules in Long Beach?

Long Beach follows California state ADU law: up to 1,200 sq ft detached, 4-foot setbacks, no parking required, no owner-occupancy requirement for post-2020 permits. The city has been proactive about ADU-friendly policies.

How much rent can I charge for an ADU in Long Beach?

A 1-bedroom ADU in Long Beach can rent for $1,800–$2,800/month depending on the neighborhood. Belmont Shore and Naples areas command premium rents, while North Long Beach is more affordable but still strong.

Building an ADU in Long Beach: 2026 Rules, Costs & Permits

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Why Long Beach Is a Great ADU Market

Long Beach is quietly one of the best cities in California for ADU investment. It has the perfect mix: strong rental demand from students (CSULB), port workers, and young professionals; home prices that are high enough to justify the investment but not as crushing as West LA or SF; and a city government that's been genuinely proactive about ADUs.

Long Beach was one of the first cities in Southern California to create a dedicated ADU program, and it shows. The permitting process is relatively smooth, and the city even offers resources to help homeowners navigate the process.

Long Beach ADU Rules & Zoning (2026)

Setbacks: 4-foot side and rear setbacks for detached ADUs. No setback required for garage conversions in the existing footprint.
Height: Up to 16 feet for single-story detached ADUs. Up to 25 feet near transit (Blue Line stations, major bus corridors).
Size: Detached ADUs up to 1,200 sq ft. JADUs up to 500 sq ft.
Parking: No additional parking required under state law.
Owner occupancy: Not required for ADUs permitted after January 1, 2020.
Lot coverage: ADUs exempt from FAR and lot coverage limits.
Coastal zone: Properties in Long Beach's coastal zone may require additional Coastal Commission review, though state law has streamlined this significantly.

Long Beach ADU Permit Process

Long Beach processes ADU permits through the Development Services Department:

Pre-application: The city offers free ADU consultations. Take advantage — they'll tell you exactly what your lot can accommodate.
Plan submission: Submit through the city's online portal. Include architectural plans, Title 24 energy calcs, and structural engineering.
Plan check: 15-day review under SB 543. Long Beach has been good about meeting this timeline.
Permit + construction: Pull your permit, hire your contractor, and build. Standard inspection sequence.
Certificate of Occupancy: Final inspection approval — you're ready to rent.

Timeline: 5–9 months from application to move-in for most projects. Garage conversions can be faster.

What ADUs Cost in Long Beach

Long Beach is slightly more affordable than LA proper, making the ROI particularly attractive:

Detached ADU (600–1,200 sq ft): $220,000 – $450,000
Garage conversion: $90,000 – $180,000
JADU: $55,000 – $110,000
Prefab/modular: $170,000 – $320,000 (installed)
Permit and impact fees: $2,500 – $7,000

Long Beach's mature contractor market and less congested inspection schedule help keep costs manageable. See our 2026 cost guide for more.

Long Beach ADU Rental Income

Rental demand in Long Beach is consistently strong across neighborhoods:

Belmont Shore / Naples / Alamitos Bay: $2,200 – $2,800/month (1-bed ADU)
Bixby Knolls / Los Cerritos: $1,900 – $2,500/month
Downtown Long Beach: $1,800 – $2,400/month
North Long Beach / Wrigley: $1,500 – $2,000/month
Near CSULB: $1,600 – $2,200/month
Studio ADU (any area): $1,300 – $1,900/month

With lower build costs and solid rents, Long Beach ADUs often achieve better ROI than nearby LA. Check our rental income guide for a deeper dive.

Long Beach ADU Incentives & Programs

CalHFA ADU Grant: Up to $40,000 — see our guide for eligibility and application tips.
Long Beach ADU Program: The city has a dedicated ADU resources page and offers pre-approved plan options to streamline your project.
Impact fee exemptions: ADUs under 750 sq ft are exempt from most local impact fees.
Southern California Edison rebates: Energy efficiency incentives for heat pumps, insulation, and solar in new ADU construction.
AB 1154 (2026): Projected ADU rental income can count toward your mortgage qualification — making financing easier for Long Beach homeowners.

2026 Law Updates for Long Beach

SB 543: 15-day permit review deadline. Long Beach has been compliant, but know your rights if they miss it. Full details here.
AB 1154: Lenders can now count ADU rental income in your loan qualification — particularly helpful for financing in this market.
Coastal zone streamlining: State law continues to reduce barriers for ADUs in coastal zones, benefiting many Long Beach properties.

Ready to Build in Long Beach?

Long Beach combines affordability, strong rental demand, and an ADU-friendly city government. Whether you're thinking about a garage conversion near CSULB or a full detached unit in Bixby Knolls, the numbers work here.

Get matched with Long Beach ADU contractors who know the local process inside and out.

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