California Property Tax Assessors

San Mateo County, California Tax Assessors' Office

San Mateo County Assessors Phone Number
San Mateo County Assessor
555 County Center, 1st Floor
Redwood City, California 94063
San Mateo County Assessors Fax Number 650-363-1903 (Fax)

Where is the San Mateo County Tax Assessor's Office?

The San Mateo County Tax Assessor Office is located at 555 County Center, 1st Floor, at the County Government Center building in Redwood City, California.

What can the San Mateo County Assessor's Office do for me?

The San Mateo County Tax Assessor's Office oversees the appraisal and assessment of properties as well as the billing and collection of property taxes for all taxable real estate located in San Mateo County.

Contact the assessor's office if you need help with paying your property taxes, applying for a homestead exemption or other tax exemption, reporting upgrades to your home, appealing your property tax assessment, or verifying your property records.

Submitting a San Mateo County property tax appeal

If you believe that your house has been unfairly overappraised (i.e. appraised at a value higher than the true market value of the property), you can attempt to get your home re-appraised at a lower value by contacting the Assessor's Office to submit a property tax appeal.

You will have to submit a form describing your property and sufficient proof that it is overassessed, including valuations of similar homes nearby as evidence. If your appeal is accepted, your home assessment (and property taxes) will be lowered as a result.

If you would like to appeal your property, call the San Mateo County Assessor's Office at (650) 363 4500 and ask for a property tax appeal form. Keep in mind that property tax appeals are generally only accepted in a 1-3 month window each year.

For more information and example appeals, see how to appeal your property taxes.

Useful San Mateo County Facts:

The median home value in San Mateo County is between $778,845.00 and $790,755.00. Property tax rates are based on property values.

How can I contact San Mateo County?

You can try contacting the San Mateo County local government directly with any issues the Assessor's Office can't solve. In many counties, certain property records such as deeds are kept in the county courthouse or county archives instead of at the tax assessors' office.

The county seat for San Mateo County is located in the County Government Center in Redwood City, which is where the San Mateo County Assessors' Office is also located. You can direct your general inquiries to San Mateo County with the contact info listed below.

San Mateo County Phone Number


San Mateo County County Government Center Address

County Government Center
400 County Center
Redwood City, CA 94063-1668