How long does it take to get ADU plans approved in California?

Key Factors Influencing Approval Times

Local Jurisdiction Workload

Building departments in high-demand areas may experience significant backlogs, leading to longer review times. The availability of staff and resources within the department can also impact processing speed.

Project Complexity

Complex ADU designs, such as those involving significant structural modifications or utility upgrades, will typically require more time for review. Projects with unique site conditions or environmental considerations may also face longer approval timelines.

Completeness of Application

Incomplete or inaccurate applications are a primary cause of delays. Ensure that all required documents, including architectural plans, engineering calculations, and site plans, are submitted accurately and comprehensively.

Local Amendments and Requirements

While California has streamlined ADU regulations, local jurisdictions may still have specific amendments or requirements that can add to the review process. These may include design guidelines, aesthetic standards, or specific setback requirements.

Plan Check Corrections

Plan check corrections, or requests for revisions, are common during the review process. The number and complexity of these corrections will directly impact the approval timeline.

Utility Connections

Coordination with utility companies for connections can also introduce delays, especially if upgrades to existing infrastructure are necessary.

Inspection Scheduling

Although this happens during construction, it is essential to know that inspection schedules can also cause delays, which should be accounted for in the overall timeline.

California's Efforts to Streamline ADU Approvals

State-Level Legislation

California has enacted several laws to streamline ADU approvals, including mandates for expedited review processes and limitations on local discretionary authority. These laws aim to reduce barriers to ADU construction and increase housing supply.

Mandatory Timeframes

State law establishes mandatory timeframes for local jurisdictions to review and approve ADU applications. However, the factors mentioned above can still affect these timeframes.

Objective Standards

California has emphasized using objective standards for ADU approvals, reducing the potential for subjective or discretionary decisions that can lead to delays.

Timeline Expectations

• While state law aims for expedited reviews, allowing several weeks to months for the plan approval process is still advisable.
• Complex projects or those in high-demand areas may require longer timelines.
• It is crucial to contact your local building department or planning office to obtain accurate and up-to-date information on their specific review timelines and requirements.

Recommendations for Homeowners

• Early Planning: Begin the planning process as early as possible to allow ample time for the review and approval process.
• Thorough Research: Research local zoning ordinances and building codes to understand all applicable requirements.
• Complete Application: Ensure your application is complete and accurate, including all required documents and information.
• Professional Assistance: Consider hiring an architect, engineer, or permit expediter with experience in ADU projects to help navigate the approval process.
• Communication with Local Authorities: Maintain open communication with the local building department and planning office to promptly address any questions or concerns.
• Contingency Planning: Factor in potential delays and allow for contingencies in your project timeline and budget.
• Documentation: Keep thorough documentation of every step of the process.