How long does obtaining all permits to build an ADU in California take?

Key Factors Affecting Permitting Timeframes

Local Jurisdiction Workload

Building departments in densely populated areas or those experiencing a surge in ADU applications may face backlogs, leading to extended wait times. The availability of staff and resources within the department directly impacts processing speed.

Project Complexity

Complex ADU designs involving extensive structural modifications, utility upgrades, or unique site conditions will require more thorough reviews, lengthening the permit process. Projects involving environmental considerations or those located in sensitive areas may face additional scrutiny and delays.

Completeness and Accuracy of Application

Incomplete or inaccurate applications are a primary cause of delays. Ensure all required documents, including architectural plans, engineering calculations, site plans, and supporting documentation, are submitted correctly. Any errors or omissions will necessitate revisions and resubmissions, extending the timeline.

Local Amendments and Requirements

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

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. Promptly addressing corrections and resubmitting revised plans is crucial for minimizing delays.

Utility Connections and Approvals

Coordination with utility companies for water, sewer, electrical, and gas connections can introduce delays, especially if upgrades to existing infrastructure are necessary. Obtaining utility approvals may require separate applications and inspections.

Inspection Scheduling

Throughout the construction process, various inspections are required to ensure compliance with building codes. The availability of inspectors and the scheduling of inspections can impact the overall timeline.

California's Efforts to Streamline Permit Processing

State-Level Legislation

California has enacted legislation to streamline ADU permitting, including mandates for expedited reviews 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.

General Timeline Expectations

• The permit process can range from a few weeks to several months, depending on the abovementioned factors.
• 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 permit timelines and requirements.

Recommendations for Homeowners

• Early Planning and Preparation: Begin the permit process as early as possible to allow ample time for reviews and approvals. Thoroughly research local zoning ordinances and building codes to understand all applicable requirements.
• Complete and Accurate Application: Ensure your application is complete and accurate, including all required documents and information. Double-check all forms and supporting documentation for errors or omissions.
• Professional Assistance: Consider hiring an architect, engineer, or permit expediter with experience in ADU projects to help you navigate the permit process. These professionals can ensure that your application is complete and accurate and can assist with communicating with local authorities.
• Communication and Follow-Up: Maintain open communication with the local building department and planning office. Promptly respond to any requests for information or corrections. Follow up on the status of your application regularly.
• Contingency Planning: Factor in potential delays and allow for contingencies in your project timeline and budget.
• Documentation: Keep thorough documentation of all communications, applications, and approvals.