Unsplash

How Long Does It Take to Get a Permit for an ADU in California?

Getting a permit for an Accessory Dwelling Unit (ADU) in California can take from a few weeks to several months, depending on location and project details. Understanding the factors that affect permit timing and the steps to potentially speed up the process can help manage expectations and streamline approvals. This information will outline what to expect and how to prepare for a smoother permitting experience.

Statewide Timeframe vs. Local Timeframe

California has introduced new laws for Accessory Dwelling Units (ADUs) that apply statewide, allowing ADUs to be added to single-family and multi-family properties. Local governments have adapted these state laws to fit their own zoning rules, resulting in slightly different requirements. Homeowners can apply for permits under three types: State-mandated ADU, Local-mandated ADU, or Hybrid ADU.

State law requires local authorities to review and make an initial decision on ADU permit applications within 60 days. However, the total time to get a permit can vary widely by city because of local regulations and additional reviews by departments like Building, Fire, Water, and Sewage.

Recent legislation aims to speed up the process by enforcing the 60-day review requirement. Despite this, studies, such as one from San Diego County, show that actual permit processing times can still be much longer. For instance, San Diego County took a median of 187 days to issue ADU permits after the 60-day rule was introduced, showing that local practices can extend beyond state goals.

Factors Affecting Timeline

Although the state aims to speed up the process, several factors can affect how long it takes to get a permit for an ADU:

Project Complexity

Design Details. More complex designs may need extra approvals, which can lengthen the permitting process.

Historical Districts. If the ADU is in a historical area, a Certificate of Appropriateness (COA) may be required to ensure the design fits the district's style.

Building Codes. To qualify as an independent living space, the ADU must meet building codes, including having separate entrances, kitchens, and bathrooms.

Location-Specific Requirements

Local Regulations. Each city or county has its own rules that can affect the length of the permit process. To qualify as an independent living space, the ADU must meet building codes, including having separate entrances, kitchens, and bathrooms process.

Additional Reviews

Certain factors may require extra approvals:

Coastal Reviews: ADUs near the coast might need approval from coastal management agencies.
HOA Approval: If your property is in a homeowner's association (HOA) area, you may need approval from the HOA.

A chart showing ADU permit timelines in Greater San Diego from October 2020 to June 2022, completed by August 2022, provides a general idea. However, local regulations vary, so checking with authorities for the most accurate information is important.

Discover your property's untapped market value through the ministerial review process.

Simplify ADU Permits: Recommendations for Faster Approval

Accessory Dwelling Units (ADUs) can help meet growing housing needs. To make it easier to get ADU permits, consider these strategies:

Streamlined Approvals. Implementing clear application procedures, providing easily accessible informational resources, and setting defined approval timelines can significantly reduce complexities for those looking to build ADUs.

Financial Incentives. Offering incentives like fee reductions, tax breaks, or density bonuses can make ADUs more appealing and financially viable for property owners.

Enhanced Communication. Establishing dedicated resources and clear guidance throughout the ADU development process is important. This could include online resources, workshops, or specific contact points for inquiries.