Special zoning regulations apply to ADU construction in Sunland. These rules govern the construction of ADUs in residential areas. All ADUs are required to comply with city building codes and zoning requirements. In addition, each region has different height limits and setback requirements.
| Lot Size | Single-Family (Maximum Floor Area Allowed) | Duplex and Multi-Family (Maximum Floor Area Allowed) |
| 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 mainly depends on the size of your plot. The minimum size for an ADU in Sunland is 150 square feet. The maximum size is decided according to the size and zone of the plot. There are different size limits for single family and multi-family property.
The maximum height of an ADU in Sunland cannot exceed the height of the main house. The maximum height of a separate ADU is normally limited to 16 feet. The slope and design of the roof are of particular importance in residential areas. Additional height may be allowed under special circumstances.
Special care is taken of the total building coverage area on the plot. The main house and ADU together cannot cover more than 45% of the plot area. It is necessary to leave enough space for open space and landscaping. This rule ensures drainage and environmental protection.
ADU installation can be done behind or next to the main house. The ADU should at least be visible from Street View. Garages are allowed to be converted into ADUs. It is necessary to take special care of the privacy of neighbors.
Single-Family Properties:
Duplex and Multi-family Properties:
The exterior design of the ADU should match with the main house. The styling of windows and doors should be the same. The materials and colours used on the exterior walls should resemble the main house. ADU can be made attractive through landscaping.
Each ADU requires an additional parking space. The parking lot may be covered or open. ADUs located near public transport may receive parking discounts. Alternative parking arrangements will have to be made when the garage is converted into an UD.
There are minimum setback requirements for ADUs. A setback of 20 feet at the front, 5 feet at the side, and 10 feet at the back is required. It is necessary to maintain buffer zones from neighboring properties. Additional setback rules apply for corner lots.
| Zone | Minimum Lot Area |
| R-20 | 6,000 sq. ft. |
| R-10 | 8,500 sq. ft. |
| R-7 | 11,000 sq. ft. |
| R-5 | 16,000 sq. ft. |
| R-2.5 | 21,000 sq. ft. |
There is a minimum plot size rule for ADU construction in Sunland. Different zones require different minimum plot sizes. The option of Junior ADU is available in small plots. The ADU is designed according to the size of the plot.
The connection of all basic amenities to ADU should be separate from the main house. New meters and connections for electricity, water and sewer are installed. Prior permission from utility companies is required. The cost of the connection is not included in the permit fee.
Special attention is paid to drainage and storm water management. There is an additional discount for solar panels and energy efficient systems. Separate arrangements can be made for internet and cable connections. Safety of utility lines is ensured.
It is mandatory to install special safety equipment to prevent fire in ADU. Smoke detectors and carbon monoxide alarms have to be installed in every room. There should be two separate exits for emergency exits. It is necessary to install a fire sprinkler system.
Special permits are required to rent short-term ADUs in Sunland. Use of ADU for a home office or business is limited. The tenant must stay for a minimum of 30 days. Additional licenses are required for commercial activities.
ADU construction in Sunland requires adherence to California building codes. All building materials should be of standard quality. Get electrical and plumbing work done by licensed contractors. Regular inspections and approvals are required.
Obtain all necessary permits before starting construction. Detailed plans and documents will have to be submitted for the permit. Ensure adherence to all safety standards during the inspection. Get the permit renewed on time.
| Permit Type | Cost |
| Building Permit | $2,500 – $5,500 |
| Electrical Permit | $300 – $600 |
| Plumbing Permit | $250 – $450 |
| Mechanical Permit | $200 – $350 |
| Demolition Permit | $150 – $250 |
| Landscaping Permit | $100 – $200 |
For ADU construction in Sunland, the property must be zoning residential. The plot size must meet the minimum requirements. It is important to give details of the structures already existing on the property. Get drainage and soil tested.
The provision of at least one car parking space is required for every ADU. The parking area should be paved and level. Can use decorative paving. Make a walking path from the parking area to ADU.
A minimum setback of 20 feet is required for the ADU at the front. The distance of ADU from the main road should be as per the rules. Follow the setbacks toward both streets on the corner lot. Leave enough space for landscaping.
A distance of at least 4 feet on both sides is required for side setbacks. Keep a minimum setback of 10 feet at the back. Additional space will have to be left for utility lines. Take care of the privacy of the neighbor.
It is necessary to maintain a minimum of 30% area of open space. Leave space for greenery and garden in the backyard. Create a safe place for children to play. Make arrangements for rainwater harvesting.
Properties located in residential zones are eligible for ADU construction in Sunland. The plot size must meet the minimum requirements. The existing structures on the property should be in good condition. Drainage and land conditions must be suitable.
Special permission will be required for ADU construction in flood-prone areas and landslide-prone areas. Additional rules apply to building ADUs with buildings of historical significance. It is necessary to follow environmental rules.
The Junior ADU main house has an area of up to 500 square feet inside. Compact cooking facility is essential for the kitchen. The bathroom can be shared. A separate entrance is necessary. The residence of the owner of the main house is mandatory.
There are a few pre-approved ADU designs available in Sunland that simplify the permit process. These designs meet all building codes and zoning requirements. Using a pre-approved plan saves time and cost. All safety standards are already approved.
Our team will help you make the necessary modifications to the pre-approved design. Custom features can be added. Changes to the interior layout are possible. Energy efficiency features can be included. The design will be updated according to your needs.
ADU Builders CA will accompany you in making your ADU project a success. Our expert team will help at every stage from permits to construction. Contact us today for a free consultation. Look for pre-approved designs and plan your ADU. Get the work done according to time and budget.
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 Sunland 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 Sunland 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.
