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Department Mission Statement

The Treasurer-Tax Collector manages and protects the County's financial assets and ensures the greatest return on County funds through the efficient collection of property taxes, professional administration of the County treasury and support to County departments in their effort to recover revenues due to the County.
Contact Information
Tax Bill Payments

Under normal circumstances, please use the envelopes supplied with your tax bill and enclose the original appropriate installment coupon(s) with your check for payment. If you have misplaced the original envelope, you may use a plain legal sized envelope. Please make sure to enclose your payment coupon(s) with your payment.

Make Checks Payable to :
Sandie Arnott
Mail Tax Payments to:
Sandie Arnott
San Mateo County Tax Collector
PO Box 45878
San Francisco, CA 94145-0878
Tax Office Hours

Monday through Friday (holidays excepted) 9:00 a.m. to 5:00 p.m.
Customer Assistance

Tax Collector Division: You can obtain payment status and general information by calling our 24-Hour Property Tax Payment and Information System at (650) 363-4142. You may also view your property tax liability through our Secured Property System or Unsecured Property System. If you need additional assistance, you may speak with a tax representative during office hours. (9:00 a.m.-5:00 p.m.)

Online Credit Card Tax Payments: Credit card payments can now be made through our Secured Property System or Unsecured Property System using Visa, MasterCard, Discover, or American Express. All credit card payments, including a convenience fee, are processed through Official Payments Corporation, our payment service provider.

Treasurer Division: You can reach the Treasurer's division during office hours by calling (650) 363-4580, option #2.

Bonds: If you have questions on the redemption of General Obligation Bonds, you may call 650-363-4977.

Business Licenses: If you have questions on the process of acquiring a business license for the unincorporated areas of the County, call 650-599-5989. (To obtain a business license within city limits, contact the appropriate city.)

The Treasurer-Tax Collector's office is located in the new County Office Building at:

555 County Center, 1st Floor
Redwood City, California 94063
(next to the County Parking Garage)

You will likely find 10 hour metered parking on the street. These meters take nickels, dimes, and quarters. You may also use the county's parking structure which takes quarters only. The meters in the county parking structure allow four hours of parking. There is also a ten-hour parking lot at Middlefield Road and Winslow.

If you are coming from areas north of Redwood City traveling south on Highway 101, take the Whipple Avenue exit. This exit places you on Veterans Blvd. Proceed straight on Veterans Blvd. to Middlefield Road. Middlefield is one short block past the second traffic signal after Whipple Avenue. Turn right onto Middlefield Road. Proceed straight on Middlefield Road approximately one block to County Center Street. Turn right onto County Center. The entrance to the building is located at the corner, 555 County Center Street. The parking structure is on the right side of Middlefield Road just before County Center St.

If you are traveling Highway 280, take the Highway 92 East exit towards the San Mateo Bridge. Take Highway 101 South, then follow the directions from Highway 101 above.

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2008 Tax Collector, County of San Mateo
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