Special zoning rules apply to ADU construction in Torrance. ADUs are allowed in residential areas but there are some restrictions too. Our team gives you information about all zoning rules. Different rules apply in each zone. You can build an ADU according to the zone of your property. This will not cause you any legal problems in the future. Our team will guide you every step of the way.
The size of the ADU in Torrance depends on the size of your main building and plot. Small ADUs can be built on small plots and large ADUs on large plots. We give you the maximum permissible area. You can choose the size of the ADU according to your need. Our team will suggest you the most suitable size. This will allow you to make the best use of your space.
| Plot Size | Single Family*(Maximum floor area)* | Duplex & Multi-Family* (Maximum Floor Area)* |
| 6,000 | 1,400 sqft | 900 sqft |
| 8,500 | 1,700 sqft | 1,100 sqft |
| 11,000 | 2,000 sqft | 1,300 sqft |
| 16,000 | 2,600 sqft | 1,800 sqft |
| 21,000 | 3,200 sqft | 2,200 sqft |
Special rules apply to the height of the ADU in Torrance that vary by location. The maximum height of the ADU is determined according to the height of the main building. The maximum height of a one-story ADU can be up to fourteen and a half feet. The height of the two-storey ADU can go up to twenty-five feet. Our team will help you determine the proper height.
There is a limit to the total construction area on your plot which includes ADU. The main building and ADU together cannot cover more than fifty percent of the area of the plot. It is necessary to leave enough space for open space and greenery. We will help you calculate the building coverage. You will be able to make the most of your assets.
There are several important rules to follow when choosing an ADU location in Torrance. ADUs can be installed behind or next to the main building. There should not be an entrance to ADU from the road side. It is important to take care of the privacy of the neighbor. Our team will help you choose the most suitable location.
Single-Family Homes:
Duplexes and Multi-family:
The exterior design of the ADU should match the main building and look attractive. The color and material must be selected carefully. The placement of windows and doors should be done thoughtfully. The roof design should match the main building. We will suggest you the best exterior design. You can make changes as per your preference.
Additional parking must be arranged for ADU in Torrance. Parking of a car is compulsory. The size of the parking lot should be nine feet by twenty feet. Alternative parking will have to be created when the garage is converted into an UD. We will give you complete information about the parking rules. You will be able to construct parking according to the rules.
A set distance must be left around the ADU which is called setback. A setback of fifteen feet is required at the front. A setback of five feet will have to be left in the back and side. Additional setbacks are required on corner plots. We will tell you the exact measurements. You will be able to build according to the rules.
The minimum size of the plot has been set for building ADUs in the RF zone. ADU is not allowed on small plots. A separate minimum area has been fixed for each zone. You should know the exact measurement of your plot. We will check your plot. You will be able to create ADU according to the rules.
| zone | Minimum Plot Area |
| R-22 | 6,000 sqft |
| R-12 | 8,500 sqft |
| R-8 | 11,000 sqft |
| R-6 | 16,000 sqft |
| R-3 | 21,000 sqft |
Separate electricity, water and sewer connections must be arranged for ADUs. It is necessary to install a separate meter from the connection of the main building. The water connection can be taken directly from the main line. Electricity connection will be given from the new panel. The sewer line will be connected to the main line. We will arrange all utility connections.
All the necessary permits must be taken for the connection and the rules must be followed. Our team will help you get the permit. All connections will be secure and reliable. Water pressure and electric voltage will be correct. The sewer system will work well. You will be able to use the utility without any hassle.
ADU must make many special provisions for fire safety which are very important. It is mandatory to install smoke detectors and carbon monoxide alarms. Doors and windows should be large enough for emergency exits. Fire extinguishers should be easily accessible. Our team will follow all safety standards. You will be able to enjoy safe ADU.
Torrance has special rules that need to be followed for short-term rentals to ADUs. Rental period less than thirty days is not permitted. The use of ADU for domestic business is limited. Commercial activities require additional permits. We will inform you of all the rules. You will be able to use ADU in a legal manner.
According to the Construction Code, ADU must follow several standards. The strength and safety of the building must be ensured. Electrical and plumbing work should be in accordance with the code. Ventilation and insulation standards must be met. Our team will follow all standards. You will be able to take advantage of quality ADU.
Different permits are required for ADUs in Torrance. The application process is simple but all documents must be correct. We will do our best to help you get the permit. You will be able to create your ADU without any hassle. Our team will handle all the paperwork.
| Permit Type | cost |
| Building Permits | $2,500 – $5,500 |
| Electrical Permit | $300 – $600 |
| Plumbing Permit | $250 – $450 |
| Mechanical Permit | $200 – $400 |
| Demolition Permit | $150 – $300 |
| Landscaping Permit | $75 – $150 |
Your property must meet some basic requirements for ADU. The plot size should exceed the minimum requirement. It is necessary to have a direct access road from the road. Water and electricity connections should be available. Our team will evaluate your property. You will be able to create ADU on your property.
The parking rules for ADUs in Torrance are very clear and important which need to be followed. Parking of a car is mandatory for a one-bedroom ADU. Parking of two cars is necessary for two or more bedrooms. The parking lot may be covered or open. Our team will ensure compliance of parking rules. You will be able to take advantage of convenient parking.
The proper distance must be maintained for the ADU from the road side which is very important. A distance of at least twenty feet from the main road is required. Setbacks will have to be left from both roads on the corner plot. ADU cannot be built beyond the line of the main building. We will tell you the exact setback. You will be able to build according to the rules.
The ADU also must leave a prescribed distance on the sides and back. The side setback should be at least four feet. A setback of five feet at the back is a must. The privacy of the neighbor should be taken care of. We will follow all setback rules. You will be able to create the correct ADU legally.
It is necessary to leave some area for open space and back courtyard. Thirty percent of the total plot area should remain open. At least 300 square feet of space is required in the back courtyard. There should be space for children to play and garden. We will plan the open space properly. You will be able to enjoy the green space.
To create an ADU in Torrance, your property must meet some basic criteria. The plot size should be larger than the minimum requirement. It is necessary to be in a residential zone. The existing building must be legally constructed. Direct access by road should be available. We will evaluate your property.
Apart from this, there are some other important qualifications that need to be taken care of. Electricity and water connections should be available. Connection to the sewer line should be possible. Not being in the flood zone will be investigated. The rules of the earthquake zone have to be followed. We will check all the requirements.
Multifamily properties
Junior ADU is a small residential unit that is built inside the main house. Its size cannot exceed five hundred square feet. There should be a separate place for the kitchen. The bathroom can be shared. A separate entrance is necessary. We will help you create magic. You will be able to create extra space at a lower cost.
The city of Torrance has already approved some ADU designs that make construction easier. Using a pre-approved design speeds up the permit process. These designs already include all the necessary standards. You can choose the design according to your need. Our team will suggest you the best options.
These designs are available for different sizes and budgets that are made for your convenience. There are options ranging from one bedroom to two bedrooms. Modern features are included in every design. The build quality is assured. You will be able to create your ADU without any hassle.
ADU Builders CA will help you successfully complete your ADU project. Our expert team will guide you every step of the way. Will accompany you in the entire process from permit to construction. We guarantee quality work and on-time delivery. You can book an appointment now by visiting our website or calling.
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 Torrance 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 Torrance 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.
