Public auctions · Tax-defaulted property sales
Tax-defaulted property auctions in the Bay Area
Counties sell tax-defaulted parcels when the owner has not paid property taxes for years. Dates and rules come from each county's tax collector. 10 programs across the nine counties, each linked to the agency's own page.
Alameda
- Next date not announced
Tax-defaulted land auction · Alameda
Alameda County Treasurer-Tax Collector
Next sale not announced yet. Held online.
Last sale: Mar 20–21 and May 15–16, 2026 (per the county's 2026 results report: 92 parcels listed, 23 sold)
Checked against the agency's page Oct 21, 2026
Contra Costa
- Next date not announced
Annual public auction (tax-defaulted property) · Contra Costa
Contra Costa County Treasurer-Tax Collector
The county says there is no public auction list at this time; check back mid January 2027. Online only; pre-registration required.
Checked against the agency's page Oct 21, 2026
- Thu Nov 19, 2026
Excess land: Antioch vacant parcel · Contra Costa
Caltrans District 4 (Right of Way, excess land)
2.33 acres (101,398 sq ft) of unimproved land by SR-4 near San Jose Dr. and Somersville Rd. Oral auction at 111 Grand Ave, Oakland (Room 13-220): registration 9:30am, bidding 10:00am. Minimum bid $2,231,000; bidder deposit $223,100 by cashier's check, money order or certified check. All-cash sale, subject to CTC approval.
Checked against the agency's page Oct 21, 2026
Marin
- Next date not announced
Tax-defaulted land sale · Marin
Marin County Department of Finance
The county says no public auction is scheduled at this time. Sales are held online.
Last sale: Mar 2024
Checked against the agency's page Oct 21, 2026
Napa
- Next date not announced
Tax-defaulted property auction · Napa
Napa County Treasurer-Tax Collector
No upcoming sale listed.
Last sale: Sep 2023
Checked against the agency's page Oct 21, 2026
San Francisco
- Next date not announced
Tax-defaulted property auction · San Francisco
San Francisco Treasurer & Tax Collector
Next sale not announced yet.
Last sale: Apr 20–23, 2026 online (5 parcels) + sealed-bid sale May 14, 2026 (4 parcels)
Checked against the agency's page Oct 21, 2026
San Mateo
- Next date not announced
Tax-defaulted property sale · San Mateo
San Mateo County Tax Collector
No date announced yet. The county says its tax sales are typically held online in August, with information posted in advance.
Checked against the agency's page Oct 21, 2026
Santa Clara
- Oct 30–Nov 2, 2026
Tax-defaulted property auction · Santa Clara
Santa Clara County Department of Tax and Collections
Held online. The county released the property list in late September 2026; its sale notice and October 2026 terms of sale are posted on the county page.
Checked against the agency's page Oct 21, 2026
Solano
- Next date not announced
Tax sale · Solano
Solano County Treasurer-Tax Collector
Next sale not announced yet. The county says tax sales are generally held online in May or June each year.
Last sale: Reoffer Jun 17–18, 2026
Checked against the agency's page Oct 21, 2026
Sonoma
- Next date not announced
Tax-defaulted property auction · Sonoma
Sonoma County Treasurer-Tax Collector
2026 sale not announced yet.
Last sale: Nov 7–10, 2025 (57 parcels listed, 18 sold)
Checked against the agency's page Oct 21, 2026
Calendar last checked Oct 21, 2026. See every Bay Area sale.