ADU Permit Guide for Long Beach, California — Step-by-Step Process (2026)

Before starting your ADU project in Long Beach, you must meet basic eligibility requirements that apply to all properties. First, you need proof of property ownership through a current title report or deed. The property must contain an existing legal dwelling that serves as the primary residence. You cannot build an ADU on vacant land or properties with only unpermitted structures.

Verify your property's zoning designation using the City of Long Beach Zoning Information Map /search. ADUs are permitted in R-1-N (Single Family Residential) and R-2-N (Two Family Residential) zones, which cover most residential areas in Long Beach. If your property shows different zoning like R-3 or R-4, different rules apply and you should contact the Development Services Department at (562) 570-6194.

Several conditions can disqualify your property from ADU development. Properties with active code violations must resolve these issues before applying for an ADU permit. If your lot is nonconforming to current zoning standards, additional restrictions may apply. Properties in historic districts face additional design review requirements that extend the approval timeline by 30-60 days.

Homeowners Association (HOA) restrictions can also block ADU development, even though state law generally preempts local restrictions. Review your CC&Rs carefully or request a compliance letter from your HOA before proceeding. Properties with existing unpermitted additions must bring these structures into compliance before adding an ADU.

Obtain a title report from a title company to identify any easements, liens, or deed restrictions that might affect your project. Utility easements often run along rear property lines where you might want to place your ADU. These documents cost $200-400 but prevent expensive design changes later.

Check for any outstanding permits or violations through the Long Beach permit portal. The city maintains records of all permits and code enforcement cases tied to your property address. Unresolved violations will block your ADU application until you address them through the proper channels.

Start your research by confirming your property meets ADU development standards. In R-1-N zones, you can build one ADU plus one Junior ADU (JADU) up to 500 square feet. R-2-N properties may have different allowances, so verify specific requirements with the Development Services Department.

Setback requirements determine where you can place your ADU. Standard setbacks in Long Beach require 4-foot side yard setbacks and 20-foot rear setbacks, but ADU regulations allow reduced setbacks of 4 feet from all property lines. Use the city's setback calculator /tools/setback-calculator to determine your buildable area. Corner lots have additional front setback requirements that affect placement options.

Height restrictions limit ADUs to 16 feet maximum in most residential zones. Measure from the average grade to the highest point of the roof structure. If your property slopes significantly, you may need professional survey work to determine compliant height measurements. This survey costs $800-1,500 but ensures your design meets requirements.

Verify utility capacity before finalizing your design. Contact Long Beach Water Department at (562) 570-2300 to confirm water and sewer capacity. Gas and electric service through Southern California Edison and Southern California Gas require separate capacity verification. Utility upgrades can add $3,000-10,000 to your project cost if existing service is inadequate.

The city offers pre-application meetings for complex projects, though they are not required for basic ADU applications. Schedule these meetings through the Development Services counter at 411 West Ocean Boulevard, 3rd Floor. Bring a basic site plan showing your proposed ADU location, dimensions, and relationship to existing structures. These meetings cost $314 and take 2-3 weeks to schedule.

Use this meeting to discuss specific challenges like utility access, tree preservation requirements, or unusual lot configurations. Staff can identify potential issues that might not be obvious from the zoning code. Take detailed notes and ask for written confirmation of any verbal guidance provided during the meeting.

ADU permit applications require complete architectural plans prepared by a licensed architect, engineer, or designer. Your plan set must include a site plan, floor plans, elevations, electrical plans, plumbing plans, and structural calculations. Energy compliance documentation using California Title 24{:target="_blank"} standards is mandatory for all new construction.

The site plan shows your ADU's location relative to property lines, existing buildings, driveways, and utilities. Include accurate dimensions to all setback lines and show existing trees over 6 inches in diameter. Mark utility connections and any easements affecting the property. Scale should be 1/8" = 1' or larger with a north arrow clearly marked.

Floor plans must show room layouts, door and window locations, and ceiling heights. Include fixture locations for bathrooms and kitchens with clearance dimensions. Show smoke detector locations and emergency egress windows in bedrooms. Minimum room sizes apply: bedrooms need 70 square feet, bathrooms 30 square feet, and ceiling heights must be at least 7'6" in most rooms.

Elevation drawings show the exterior appearance from all four sides. Include materials specifications, window and door details, and roof lines. Show existing grade lines and finished floor elevations. The architectural style should be compatible with the neighborhood character, though Long Beach does not have specific design standards for ADUs.

Structural calculations must be prepared by a licensed structural engineer and include foundation design, framing plans, and lateral force calculations. California seismic requirements apply to all new construction. Simple slab-on-grade foundations work for most ADU projects and cost less than full basement or crawl space designs.

Title 24 energy compliance requires calculation of the building envelope performance including insulation values, window efficiency, and HVAC system sizing. Use approved software like EnergyPro or hire a Title 24 consultant. This documentation costs $800-2,000 but is required for permit approval.

Consider pre-approved ADU plans available from the city or private companies. These plans have already passed plan review and can reduce approval time by 3-4 weeks. Modification of pre-approved plans still requires full review, so use them only if they meet your specific needs without changes.

Submit your ADU permit application through the Long Beach online permit portal or in person at the Development Services counter. Online submission is available 24/7 and provides automatic confirmation receipts. In-person submission allows immediate review of your documents for completeness but requires waiting in line during business hours.

Your application package must include the completed ADU permit application form, full architectural plan set, structural calculations, Title 24{:target="_blank"} energy compliance forms, and applicable fees. The basic ADU permit fee ranges from $5,000-$15,000 depending on project size and complexity. Additional fees include plan review ($2,500-4,000), building permit ($1,500-3,500), and school impact fees at $4.79 per square foot.

Impact fees are waived for ADUs under 750 square feet under SB 13, providing significant savings. School impact fees still apply regardless of size. Water and sewer connection fees depend on your specific utility requirements and existing service capacity. Request a fee estimate before submitting to avoid surprises.

Complete the application form accurately with property owner information, contractor details, and project specifications. Incorrect information delays processing and may require resubmission. Property owner signature is required even if you are using an agent or contractor to submit the application.

Include a completed Accessory Dwelling Unit Affidavit acknowledging deed restriction requirements. This form confirms your understanding that the ADU must remain a separate rental unit and cannot be sold separately from the main property. Sign this form in front of a notary public.

Common submission mistakes include incomplete plan sets, missing structural calculations, unsigned applications, and insufficient fees. Review the submittal checklist carefully before submitting. Missing items require resubmission and restart the review timeline. The city cannot begin review until all required documents are provided.

After submission, your application enters the plan review process involving multiple city departments. The Development Services Department coordinates review between planning, building, fire, and public works divisions. California law requires cities to approve or deny ADU applications within 60 days of receiving a complete application.

The first review cycle typically takes 4-6 weeks in Long Beach. Planning staff verify zoning compliance, setbacks, and height restrictions. Building division checks structural plans, code compliance, and construction details. Fire department reviews access requirements and fire safety systems. Public works examines utility connections and drainage.

Plan check comments arrive via email or through the online portal system. These comments list specific deficiencies that must be addressed before approval. Common comments include missing structural details, inadequate egress windows, insufficient electrical circuits, or setback violations. Each comment includes reference to specific building code sections.

Respond to plan check comments by revising your drawings and resubmitting corrected plans. Highlight all changes with revision clouds and include a written response addressing each comment. Resubmission fees apply for each review cycle after the first. Most projects require 1-2 revision cycles before approval.

The second review focuses only on items identified in the first round of comments. New issues discovered during revision review can extend the process, so address comments thoroughly the first time. Incomplete responses to plan check comments result in additional review cycles and fees.

Complex projects or unusual site conditions may require additional review time beyond the standard 60-day requirement. The city will notify you if additional time is needed and provide a revised timeline. Work closely with your architect or designer to address comments promptly and keep the project moving forward.

Track your application status through the online portal or by calling the Development Services Department. Staff can provide estimated timelines for your specific application and alert you to any issues requiring immediate attention.

Once your permit is approved and fees are paid, you receive building permits and can begin construction. Post the permit card in a visible location on the job site. Construction must begin within 180 days of permit issuance or the permit expires and requires renewal fees.

Schedule required inspections through the online system or by calling (562) 570-6555 at least 24 hours in advance. Long Beach requires specific inspections at various construction phases: foundation inspection before concrete placement, framing inspection after rough framing completion, electrical rough inspection before covering wires, plumbing rough inspection before covering pipes, and insulation inspection before drywall installation.

Foundation inspection verifies proper excavation depth, rebar placement, and anchor bolt locations. Have your structural plans on site for inspector reference. Failed foundation inspections often result from incorrect rebar spacing or inadequate concrete strength specifications. Schedule this inspection after forms are set but before concrete pour.

Framing inspection covers structural framing, shear walls, and roof structure. Inspectors check lumber grades, connection details, and adherence to structural plans. Common failures include missing structural connectors, incorrect lumber sizes, or improper spacing. This inspection typically takes 30-45 minutes for a standard ADU.

Electrical rough inspection occurs after wire installation but before insulation. Have electrical plans available and ensure all circuits are properly labeled. GFCI outlets are required in bathrooms, kitchens, and outdoor locations. Smoke detectors must be hardwired with battery backup in all bedrooms and hallways.

Plumbing rough inspection checks supply lines, drain lines, and venting systems. Test all connections for leaks before inspection. Water pressure test results must be available for inspector review. Kitchen and bathroom fixture locations must match approved plans.

Final inspection occurs after all finish work is complete. Inspectors verify all systems function properly, safety devices work correctly, and construction matches approved plans. Address requirements include posting the assigned address number in a visible location. This inspection can take 1-2 hours depending on project complexity.

After passing final inspection, request a Certificate of Occupancy (CO) from the Development Services Department. This certificate confirms your ADU meets all building codes and zoning requirements and is safe for occupancy. The CO process takes 5-10 business days after final inspection approval.

The city assigns a separate address to your ADU as part of the CO process. This address is required for utility service, mail delivery, and rental agreements. Address assignment coordinates with the fire department for emergency response purposes. New address posting must be visible from the street using numbers at least 4 inches tall.

Schedule utility connections after receiving your CO. Long Beach Water Department activates water and sewer service upon CO issuance. Contact Southern California Edison for electrical service connection and Southern California Gas for gas service. Utility activation takes 3-5 business days with proper notice.

Record your ADU with the Los Angeles County Assessor's Office for property tax purposes. The county will reassess your property value including the ADU improvement. Property tax increases typically range from $200-800 monthly depending on ADU size and construction quality. This reassessment occurs automatically but may take 6-12 months to appear on tax bills.

You can legally rent your ADU immediately upon CO issuance. California law prohibits owner-occupancy requirements for ADUs permitted before 2025. However, local rent control ordinances may apply to your ADU rental. Check with the Long Beach Housing Authority regarding any applicable rent stabilization requirements.

Keep all permit documents, inspection records, and the Certificate of Occupancy in your property files. Future buyers will need these documents to verify legal ADU status. Unpermitted modifications to your ADU may require new permits and inspections.

Setback violations cause the most ADU permit denials in Long Beach. Properties with irregular shapes, existing nonconforming buildings, or utility easements often have limited buildable area. Verify all property lines using a current survey before designing your ADU. Corner lot requirements include setbacks from both street frontages, reducing available space significantly.

Incomplete plan submissions delay approval by 3-4 weeks on average. Missing structural calculations, unsigned applications, or incomplete Title 24{:target="_blank"} documentation require resubmission and restart the review timeline. Use the city's submittal checklist to verify all required documents before submission. Hire experienced professionals familiar with Long Beach requirements.

Utility capacity issues affect properties in older neighborhoods with undersized water or sewer connections. Long Beach Water Department may require utility upgrades costing $5,000-15,000 before approving new ADU connections. Verify capacity early in your design process to avoid expensive surprises during construction.

HOA restrictions block many ADU projects despite state preemption laws. Review your CC&Rs carefully and consider legal consultation if restrictions exist. Some HOAs have modified their rules to comply with state ADU laws, while others maintain older restrictions. Obtain written HOA approval before submitting city permits to avoid conflicts.

Fire department access requirements affect ADUs on narrow lots or properties with limited street frontage. Fire trucks must reach within 150 feet of all portions of your ADU using approved access routes. Gated communities or properties with long driveways may need additional fire safety measures including sprinkler systems.

Tree preservation requirements delay permits when protected trees affect ADU placement. Long Beach protects trees over certain sizes and species. Tree removal permits add 4-6 weeks to your timeline and cost $500-2,000. Design around existing trees when possible or budget for removal permits and replacement requirements.

Historical district properties face additional design review taking 60-90 days beyond standard permit processing. These properties must maintain architectural compatibility with surrounding historic buildings. Hire architects experienced with historic district requirements and budget additional time for design review board approval.