Public auctions · Contra Costa County
Public auctions in Contra Costa County
Contra Costa County Treasurer-Tax Collector has not posted a sale date. Caltrans District 4 (Right of Way, excess land) has a sale set for Thu Nov 19, 2026. Each entry links to the agency's own page first.
Tax-defaulted property
From the county's own tax collector page. Read the agency's terms of sale before you bid.
- 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
Surplus vehicles and equipment
Sold by agencies in Contra Costa County through the channels listed. Bidding happens on the platform the agency names.
- Ongoing, 14-day auctions
County surplus equipment · Contra Costa
Contra Costa County Public Works
Items sold as-is, no warranty or returns. Pickup at the Surplus Yard, 4785 Blum Road, Martinez, Tue and Thu 1–3pm or by arrangement.
Checked against the agency's page Oct 21, 2026
Bidding sites used here: GovEase, In-person oral auction, Public Surplus. We link to them so you can bid and take no dates or details from them. Calendar entries last checked Oct 21, 2026. See every Bay Area sale. Picker's Desk is independent and isn't affiliated with any agency or auction site.