Deciding to form an ADU is an important step. So first of all, understand your needs and objectives clearly. Keep in mind the size, design and budget of the ADU. Consider your family’s current and future needs. This will help you make the right decision.
Once you understand your needs, start planning. Consult the right professionals and get their guidance. Evaluate your property and make a financial plan. Gather information on all required permits and approvals. This process will lead you to successful ADU creation.
Site planning is very important for ADU in Whittier. The size and condition of your property affects the design of the ADU. The slope of the ground, soil conditions, and utility connections are considered. Distance from neighboring properties and the availability of natural light are also important. The site plan also includes plans for parking spaces and landscaping.
Whittier has special rules and regulations for ADU construction. It is mandatory to follow these rules. It is important to understand building codes, zoning rules, and setback requirements. Following fire safety and electricity regulations is also important. Non-compliance with the rules can lead to fines or legal action.
The design of the ADU should be beautiful and functional. Special care is taken for the convenience of the occupants. The size of the rooms, the position of the windows and the location of the doors are thoughtfully decided. The kitchen and bathroom are specially planned. The interior design carries out a proper combination of colour, lighting and ventilation.
Prepare the floor plan of your ADU according to your needs. Choose the number and size of rooms according to your preference. Keep the kitchen and bathroom position convenient. Make proper arrangements for storage space. Make proper placement of windows for natural light and air. Leave enough space for furniture placement. Choose the interior design to your liking.
Our ADU services are available in all zip code areas of Whittier. Wherever you live, we are ready to help.
| Zip Code |
| 90601 |
| 90602 |
| 90603 |
| 90604 |
| 90605 |
| 90606 |
ADU Builders CA serves the Whittier city with premium ADU construction. Our full-service team handles everything from permits to final touches. State-certified contractors ensure your project meets all regulations. We have delivered over 200 successful ADU projects since we started. We specialize in modern, space-efficient designs that maximize your property value.
The cost of an ADU in Whittier depends on its size and design. From the table below you can get an idea of the estimated cost.
| Type & Square Foot | Average Cost | Medium Cost | High-End Cost | Property ROI (%) |
| Studio ADU (420 sq. ft.) | $120,000 | $220,000 | $230,000 | 6% |
| 1 Bed 1 Bath (520 sq. ft.) | $220,000 | $230,000 | $320,000 | 7% |
| 2 Beds 1 Bath (630 sq. ft.) | $230,000 | $320,000 | $330,000 | 8% |
| 2 Beds 2 Baths (1000 sq. ft.) | $320,000 | $330,000 | $420,000 | 9% |
| 3 Beds 2.5 Baths (1,1100 sq. ft.) | $420,000 | $430,000 | $120,000 | 10% |
The Building and Planning Departments for the City of Whittier are located within the Community Development Department at Whittier City Hall.
Address: 13230 Penn Street
Whittier, CA 90602
Yes, most permit applications can be submitted through the city’s official website.
Contact the Planning Division at (562) 567-9320.
Yes, the city provides ADU guidelines and checklists online and at the office.
Yes, the city frequently holds ADU workshops to guide homeowners.
The ordinance is available on the official City of Whittier website.
You’ll need to add the ADU to your existing homeowner’s policy for coverage.
You need property insurance, liability insurance, and optional rental coverage.
Yes, rental ADUs typically require additional coverage for tenant-related risks.
Your insurance policy will cover damages, provided the ADU is listed on the policy.
Yes, some insurers offer separate policies specifically for ADUs.
Yes, landlord insurance protects against tenant-related risks and damages.
Options include home equity loans, HELOCs, construction loans, and ADU-specific loans.
A Home Equity Line of Credit (HELOC) allows you to borrow against your home equity.
Yes, some local and state lenders offer ADU loans with favorable terms.
Yes, but interest rates may be higher compared to secured loans.
Yes, some state programs offer grants to encourage ADU construction.
Yes, cash-out refinancing is a common way to finance ADU construction.
Fees include plan check, impact fees, utility connections, and inspection fees.
