Special zoning regulations apply to ADU construction in Redondo Beach. Each residential area has different rules that govern the size and location of the ADU. It is very important to understand these rules before construction. One or two-storey ADU is allowed in residential areas. Special permits may be required in some areas.
The new schedule is as follows:
| Lot Size | Single-Family (Maximum Floor Area) | Duplex and Multi-Family (Maximum Floor Area) |
| 6,000 | 1,400 sq ft | 900 sq ft |
| 8,500 | 1,700 sq ft | 1,100 sq ft |
| 11,000 | 2,000 sq ft | 1,300 sq ft |
| 16,000 | 2,600 sq ft | 1,800 sq ft |
| 21,000 | 3,200 sq ft | 2,200 sq ft |
The size of the ADU is determined according to the total area of the lot. The size of the main house is also taken into account. There are different size limits for single-family and multi-family properties. Special rules apply to convert a basement or garage into an ADU.
The maximum height of the ADU in Redondo Beach should be less than the height of the main house. A one-story ADU can have a maximum height of up to fifteen feet. The maximum height for a two-storey ADU has been set at twenty-five feet. The height is calculated taking into account the slope of the roof and the exterior design.
The total area of the property includes the construction area of the DU. The main house and ADU together cannot cover more than fifty percent of the area of the lot. It is necessary to leave enough space for open space and landscaping. The area of garage or covered parking is also included in it.
The location of the ADU is decided according to the condition and size of the property. Making ADUs in the back yard is considered most suitable. Special permission is required for ADU in the side yard. ADUs are not allowed in the front yard.
Single-Family Homes:
Duplexes and Multi-family:
The exterior design of the ADU should match the main house. The color, material and architectural style are carefully selected. The size and location of windows and doors should be as per the prescribed standards. Special attention is paid to the design of the roof and the quality of building materials.
An additional parking space is required for every ADU. The size of the parking lot should be suitable for a standard car. Garages or covered parking are constructed as per rules. Parking requirement may be waived in certain circumstances.
It is necessary to leave the prescribed distance around the ADU. A distance of at least five feet from neighboring property is mandatory. A setback of ten feet at the back and four feet at the side is required. Trees and plants can be planted in the buffer zone.
The new schedule is as follows:
| Zone | Minimum Lot Area |
| R-22 | 5,500 sq. ft. |
| R-12 | 8,000 sq. ft. |
| R-8 | 11,000 sq. ft. |
| R-6 | 16,000 sq. ft. |
| R-3 | 21,000 sq. ft. |
ADU requires independent utility connections. Separate meters and connections for electricity, water and sewer are installed. The capacity and location of the connection are determined by specialists. All connections are established according to local codes and standards.
The cost of the utility connection and permit fee are charged separately. The new connection may require road digging and repairs. System checking and authentication is mandatory after connection. Emergency shut-off valves are arranged for all utilities.
Special fire safety measures must be taken at ADU. Smoke detectors and carbon monoxide alarms are installed in every room. There should be at least two routes to the emergency exit. The fire extinguisher is installed at an accessible place.
ADUs require special permits to rent short-term. The rental period and tenant information must be registered. The use of ADU for domestic business is limited. Rules governing noise and traffic apply.
ADU construction is mandated to comply with California building codes. The selection of building materials and techniques is carried out according to the standards. Electrical and plumbing systems are subject to special codes. It is necessary to get the inspection done from time to time.
All necessary documents and plans must be submitted for an ADU permit. The permit process can take thirty to sixty days. Approval from various departments is necessary. All fees are paid in a lump sum.
New permit fee table:
| 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 | $100 – $200 |
The property must meet some basic requirements for ADU construction. The size of the lot must exceed the minimum requirements. The existing structure should be in good condition. The slope of the land and the soil condition must be suitable.
Additional parking space is required for ADU. The parking size should be suitable for the standard vehicle. The entry and exit routes should be clear. Parking rules may be relaxed in some special cases.
Special setback rules apply for ADUs on the road side. A distance of at least twenty feet from the main road is mandatory. The corner lot requires setbacks from both streets. Landscaping can be done in the setback area.
A setback of four feet is required for the ADU in the side yard. It is necessary to leave a setback of ten feet from the rear. Utility connections and landscaping are allowed in setbacks. Privacy of neighbouring properties is taken care of.
Maintenance of open space and rear yard is essential. At least thirty percent of the lot area must be left open. Space is reserved for children to play and entertain. Plants and small trees are planned for the green area.
The property must meet certain criteria for ADU construction in Redondo Beach. The lot size must be larger than the minimum requirements. The condition of the existing house should be good. Drainage and soil conditions need to be suitable.
There may be restrictions on ADU construction in some areas. Special permission is required in landslide areas and areas prone to flooding. Additional rules apply for buildings of historical importance. ADU construction is limited in environmental protection areas.
Multifamily properties
Junior ADUs are small-sized units that are built inside the main house. Their maximum size is limited to five hundred square feet. Shared use of the kitchen is permitted. Separate entrance is mandatory. A separate bathroom can be arranged.
Some ADU designs are already approved in Redondo Beach. Selecting these designs speeds up the permit process. Detailed plans are available for standard sizes and layouts. The construction cost can be easily estimated.
The pre-approved design includes various options. Models ranging from one bedroom to two bedrooms are available. A mix of modern and traditional styles is seen. Special attention is paid to energy efficiency and sustainable construction.
ADU Builders CA is ready to help you make your ADU project a success. Our expert team will provide you with guidance every step of the way. We simplify the entire process from permits to construction. Contact us today and get started realizing the ADU of your dreams.
ADUs may be subject to rent control depending on the property type and rental laws.
Fire sprinklers are required only if the main residence has them.
Yes, you can build ADUs on multi-family properties under specific conditions.
ADUs must complement the primary residence in style and materials.
Yes, ADUs must meet California Title 24 energy standards.
Yes, but additional reviews and approvals may be required for historic properties.
