California Property Tax Assessors

Napa County, California Tax Assessors' Office

Napa County Assessors Phone Number
Napa County Assessor
1127 First Street, Room 128
Carithers Building
Napa, California 94559
Napa County Assessors Fax Number 707-253-6171 (Fax)

Where is the Napa County Tax Assessor's Office?

The Napa County Tax Assessor Office is located in the Carithers Building building in Napa, California.

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

The Napa 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 Napa 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 Napa 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 Napa County Assessor's Office at (707) 253 4467 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 Napa County Facts:

The median home value in Napa County is between $559,288.00 and $583,712.00. Property tax rates are based on property values.

How can I contact Napa County?

You can try contacting the Napa 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 Napa County is located in the County Administration Building in Napa, which is located at 1195 3rd St. You can direct your general inquiries to Napa County with the contact info listed below.

Napa County Phone Number


Napa County County Administration Building Address

County Administration Building
1195 3rd St
Napa, CA 94559-3035