A Guide to Getting Permits for Renovations in San Mateo County

(Note: This guide provides an overview of the permitting process in San Mateo County and is for informational purposes only. Contact the San Mateo planning department for specific information pertaining to your planned renovations.)

If you're planning a home renovation in San Mateo County, understanding the permitting process is essential. Renovation permits ensure that your project complies with local building codes, zoning laws, and safety regulations. Navigating the permit process may seem daunting, but with the right preparation, it can be a straightforward part of your home improvement journey.

Why Do You Need a Permit?

Permits are required for most renovations to ensure safety, structural integrity, and compliance with local codes. In San Mateo County, you’ll likely need a permit for projects such as:

• Building additions

• Kitchen or bathroom remodels

• Electrical, plumbing, or HVAC work

• Installing a deck, retaining wall, or swimming pool

• Structural changes, such as removing or adding walls

However, minor projects like painting or replacing flooring typically do not require permits.

Steps to Obtaining a Permit in San Mateo County

1. Determine the Type of Permit Needed
   The type of permit you need depends on the scope of your project. Common types include building permits, electrical permits, plumbing permits, and mechanical permits. For larger projects, a combination permit may be required.

2. Prepare the Required Documents
   Typical documentation includes:

   • Plans and Drawings: Detailed blueprints or sketches of your project.

   • Site Plan: A map showing property boundaries and the location of the proposed renovation.

   • Engineering Calculations: For structural changes, calculations by a licensed engineer may be necessary.

   • Energy Compliance Forms: For projects involving energy systems, such as new windows or HVAC installations.

3. Submit Your Application
   Applications can be submitted online through the San Mateo County Building Department's ePermits system or in person at the Planning and Building Department office. Be sure to provide all required documentation to avoid delays.

4. Pay Fees
   Permit fees vary based on the size and scope of your project. These fees cover plan reviews, inspections, and administrative costs. Check the fee schedule for the latest rates.

5. Wait for Approval
   After submission, your plans will be reviewed by the county’s building department. Review times can range from a few days to several weeks, depending on the complexity of your project.

6. Schedule Inspections
   Once your permit is approved and work begins, you’ll need to schedule inspections at key milestones (e.g., after framing, electrical, or plumbing work). Inspections ensure the work complies with approved plans and safety standards.

Tips for a Smooth Permit Process

• Work with a Licensed Contractor
  A licensed contractor familiar with San Mateo County’s permitting requirements can streamline the process and help ensure compliance.

• Start Early
  Permit approvals can take time, especially for larger projects. Begin the application process as early as possible to avoid delays.

• Stay Informed
  Keep track of your permit status and inspection schedule through the county’s online portal. Respond promptly to any requests for additional information.

Consequences of Skipping Permits

Undertaking renovations without the necessary permits can lead to significant consequences, including fines, project delays, or difficulties when selling your home. Unpermitted work may need to be demolished or brought up to code at your expense.

Final Thoughts

Renovating your home in San Mateo County is an exciting endeavor, and obtaining the necessary permits is a critical step in ensuring a successful project. By following the county’s guidelines and working with experienced professionals, you’ll create a safer, more valuable property that aligns with local regulations.