Specific zoning regulations apply to ADU construction in Long Beach. ADUs are allowed in single-family and multi-family residential areas. Every zone has different requirements that govern the building’s height, site coverage, and setbacks. It is essential to follow these rules so that your ADU project conforms to legal standards.
| Lot Size | Single-family | Duplexes and multi-families |
| 6,500 | 1,400 sqft | 950 sqft |
| 8,800 | 1,700 sqft | 1,150 sqft |
| 11,200 | 2,000 sqft | 1,350 sqft |
| 16,500 | 2,600 sqft | 1,750 sqft |
| 21,500 | 3,200 sqft | 2,150 sqft |
The maximum height of the ADU in Long Beach should be less than the main structure. The height of a one-storey ADU is limited to sixteen feet. For a two-story ADU, the maximum height allowed is up to twenty-five feet. The slope and design of the roof should be within this range.
According to Long Beach regulations, ADU’s total building coverage should be limited. The main building and the ADU together cannot cover more than fifty percent of the area of the lot. This rule is very important to maintain open space and green area.
Single-Family Properties:
Duplex and Multi-family Properties:
The exterior design of the ADU should coincide with the main building. The styling of windows and doors, the roof material, and the color of the exterior walls should match the main building. We use quality building material that lasts for a long time.
ADUs require additional parking. One parking lot is required for one-bedroom ADUs and two parking spaces for ADUs with two or more bedrooms. The parking lot may be covered or open.
Long Beach has minimum setback requirements for ADUs. A setback of twenty feet at the front, ten feet at the back, and five feet at the side is a must. These distances are important for fire safety and privacy.
| zone | Minimum lot area |
| R-22 | 6,500 sqft |
| R-12 | 8,800 sqft |
| R-9 | 11,200 sqft |
| R-6 | 16,500 sqft |
| R-3 | 21,500 sqft |
Management of utility connections to ADUs must be done carefully. Electricity, water and sewer connections should be separated from the main building. We establish all connections according to local codes and check them regularly.
All utility meters are installed in a safe place. Gas lines, electric wires, and water pipes are laid at the proper depth inside the ground. This maintains safety and facilitates maintenance.
For fire safety, it is necessary to install smoke detectors and carbon monoxide alarms in ADU. Windows and doors should be large enough for emergency exits. We also install fire sprinkler systems.
Special permits are required to rent an ADU short-term in Long Beach. Commercial activities are allowed in ADU and require a separate license. Only activities that do not harass neighbors are allowed for domestic business.
ADUs must be constructed in accordance with California Building Codes. This includes standards for electrical, plumbing and mechanical systems. We ensure that all construction works conform to safety standards.
| Permit Type | cost |
| Building Permits | $2,500 – $5,500 |
| Electrical Permit | $350 – $600 |
| Plumbing Permit | $300 – $500 |
| Mechanical Permit | $250 – $400 |
| Demolition Permit | $200 – $300 |
| Landscaping Permit | $150 – $200 |
The property is required to be on the field for ADU construction. The slope of the ground should not exceed fifteen percent. Soil testing and groundwater level reports are required. We check all these requirements.
A minimum setback of twenty feet is required at the front for the ADU. This distance is measured by the boundary of the road. This is a must for large vehicles to maintain the turning space and aesthetics.
The side setback should be at least five feet. A setback of ten feet in the back is necessary. These distances are important for neighbor’s privacy and fire safety.
It is necessary to have open space which is twenty percent of the total lot area. The back yard should have enough space for children to play and garden. It is important to maintain green cover.
Single-family and multi-family residential properties in Long Beach are eligible for an ADU. The area of the property must meet the minimum requirements. The condition of the building should be good and the infrastructure should be strong.
According to the new rules, ADU is allowed even in historic buildings. But for this, special approvals and design standards have to be followed. We guide you through this process.
The Junior ADU main building has an area of up to five hundred square feet inside. It should have small kitchen and bathroom facilities. A door can be shared with the main building. We specialize in the creation of JADU.
The City of Long Beach has already approved some ADU designs. Using these designs speeds up the permit process. We have pre-approved designs available for different size and budget.
The pre-approved design includes options ranging from one bedroom to two bedrooms. They are equipped with modern facilities and energy-efficient systems. We can also make changes in the design according to your needs.
At ADU Builders CA we are committed to making your ADU project a success. Our expert team will guide you through every step from design to construction. Contact us today and take the first step towards realizing your dream ADU.
Fire sprinklers are only required if the primary dwelling also has them.
ADUs typically require a minimum setback of 4 feet from property lines.
Separate utility connections are optional but not mandatory for most ADUs.
The checklist includes design review, site plans, structural plans, permits, and financing.
You need site plans, floor plans, construction details, and a permit application.
Inspections typically include foundation, framing, plumbing, electrical, and final review.
Work with licensed professionals to design and construct your ADU to code.
You may need to revise and resubmit plans to the Long Beach planning office.
Submit complete and accurate documents and work with professionals to avoid delays.
ADUs under 750 sq. ft. are exempt from impact fees.
Yes, it includes checking structure, utilities, and obtaining conversion permits.
Yes, ADUs must meet height, size, and setback requirements, and their design should complement the primary dwelling.
Yes, but you need to ensure the ADU fits within allowable lot coverage and setback rules.
ADUs must comply with California Building Codes, including foundation, framing, insulation, plumbing, and electrical requirements.
Yes, ADUs must comply with California Energy Code (Title 24) and include energy-efficient windows, insulation, and appliances.
You must submit a revised plan to the Long Beach Building Department and may incur additional fees or inspections.
Yes, ADUs near high-noise areas (e.g., busy roads) must include soundproofing measures such as double-glazed windows.
Yes, you can appeal to the city’s Planning Commission or seek adjustments to meet requirements.
Lot coverage varies by zoning but generally allows for up to 50% of the lot to be developed, including the primary dwelling and ADU.
