Important Update: COVID-19


Building Division

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*Due to COVID-19, the Building Department counter is closed to the public until further notice.  For questions regarding building permit submittal, plan check revisions, inspections, or other Building Department related questions, please contact us at:

Permit Technician: Don Nguyen,, 650-259-2330

Deputy Building Official: Romeo Herrera,, 650-259-2403

Counter hours for the Building Division are Monday - Friday from 8:30 am to 12:00 pm, and by appointment from 1 p.m. to 4 p.m.  Call (650) 259-2330 for further information, or to schedule an appointment or inspection.  

Building Codes

The City of Millbrae uses the following 2019 editions of:

  • California Building Code
  • California Residential Code
  • California Electrical Code
  • California Mechanical Code
  • California Plumbing Code
  • California Energy Code
  • California Fire Code
  • California Green Building Standard Code

It should be noted that these codes are amended by the City of Millbrae to include various additional requirements. Standard code questions can be answered by building division staff, however, more complex design issues should be referred to a design professional such as an architect or engineer.

Permits & Reviews

The Building Division issues a number of different permits, such as building, plumbing, electrical, and mechanical. Permits from other departments, such as, public works, or fire, may also be required. A building permit is required anytime a building or structure, or any electrical, plumbing or mechanical system, is to be erected, constructed, enlarged, altered, repaired, moved, improved, removed, converted or demolished. There are some exceptions to this requirement. If you are planning a project, it's a good idea to contact Building Division Staff to see if a permit will be required. The phone number is 650-259-2330.

Register or Login to Online Building Permitting and Plan Review

Plan Check Process

Typically, plans, specifications, energy calculations, soils reports and other data are required whenever new construction work is proposed. The documentation is routed for review by all pertinent City departments to ensure compliance with applicable codes and regulations before building permits are issued. Permit applicants should allow a minimum of 2 to 4 weeks for initial plan check activities to be performed depending on the complexity of their project. Certain types of permits may be subject to a streamlined permitting process and will be reviewed in house as time allows, these permits/plans are typically for SolarPV systems, electric vehicle charging stations, kitchen and bath remodels. 

If required, the Building Division staff will examine your plans for compliance with adopted codes and regulations. At the same time, other relevant departments or divisions will be doing their own check of your plans. Each department or division will contact you directly regarding necessary conditions and comments. Once other departments or divisions code requirements are satisfied, they will approve their portion of your permit application. Necessary revisions are usually made directly to your plan, but sometimes changes will be attached to the permit as conditions of approval.

Over-the-counter plan checks are routinely provided for basic repair and replacement work such as termite repair, re-roofing, residential seismic strengthening, mechanical equipment, change- outs, some sign installations, minor demolition work, etc. Over-the-counter plan checks are typically not provided for new construction work or for projects involving building additions, alterations and remodels. For further information, contact the Building Division at 650-259-2330.


Inspections are required for all permitted work in the City of Millbrae. The purpose of inspections are to ensure that the work meets the construction and installation requirements of applicable codes. These inspections are required for all work that is performed. Inspection requests should be made at least one day in advance. Inspection requests can be made by calling 650-259-2330, Monday - Friday from 8:30 a.m. to 12:00 noon.

Normal inspections are performed Monday through Friday from 1:00 p.m. to 4:30 p.m. It is your responsibility to arrange for inspections, and the proper inspection must take place before you can proceed to the next phase of the work. For additional information, contact the Building Division at 650-259-2330.

Building Inspection FAQ

Certificate of Occupancy

After the final inspection and verification that all work under a permit is complete for the new structure or tenant space and that all departmental conditions have been met, the Building Division will issue a Certificate of Occupancy, signifying that you have met all requirements and that your project is safe and legal for occupancy and use.


The Building Division collects fees to cover the costs of providing services. Typical fees may include, plan check, building, fire, sewer connection and documentation. Fees not collected by the Building Division include, school fees (both elementary and high school), encroachments, new water service and new sewer service. For specific fee questions, call the Building Division at 650-259-2330.

Hours of Construction

  • Monday - Friday; 7:30 a.m. to 7:00 p.m.
  • Saturday; 8:00 a.m. to 6:00 p.m.
  • Sunday and Holidays; 9:00 a.m. to 6:00 p.m.

Exceptions to these hours must be approved by the Building Official

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