Contra Costa County property record for 2866 Winthrop Ave, San Ramon, CA 94583 · Last verified July 2026
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 2,515 sqft · built 1969 |
| Lot Size | 0.188 acres (8,190 sqft) |
| Owner | 2 Company Names on File |
| Last Sale | $755,000 (Jun 2014) |
| Tax Bill | $11,177 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 210-502-012-3 |
| Primary APN | 210-502-012-3 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 10 Rooms |
| Stories | 1 Story |
| Building Area | 2,515 sqft Living Area |
| 1st Floor Area | 2,515 sqft |
| Year Built | Built 1969 |
|---|---|
| Effective Year Built | Effective 1980 |
| Lot Area | 8,190 sqft (0.188 acres) |
| Garage Type | Attached |
| Garage Area | 446 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|
| Street Address | 2866 WINTHROP AVE |
|---|---|
| City | SAN RAMON |
| State | CA |
| Zip | 94583-3437 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | TRACT 3278 LOT 22 |
| Legal Subdivision | SUBDIVISION3278 |
| Legal Tract | 3278 |
| Legal Lot Number | 22 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2002 |
| Census Tract | 345101 |
Source: Contra Costa County records · APN 210-502-012-3
Assessment roll updated July 14, 2026 · Last verified July 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Company Names on File |
|---|---|
| Mailing Address | 2866 WINTHROP AVE, SAN RAMON, CA 94583-3437 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Tenants in Common |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Jun 30, 2014 · Amount on Record |
| Deed Sale | Jun 30, 2014 · Amount on Record |
| Prior Sale | Jun 30, 2014 · Amount on Record |
| Deed Document Number | 2014106880 |
| Prior Transfer Date | Mar 05, 2004 |
| Prior Transfer Doc | 0000085125 |
| Record Updated | Sep 20, 2026 |
Source: Contra Costa County records · Assessment roll updated July 14, 2026 · Last verified July 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | San Ramon City |
| Unified School District | San Ramon Valley Unified School District (KG - 12) |
Assessed value is set for property tax purposes and is not a market price estimate.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $980,247 (+2%) Land $650,190 Building $330,057 | |
| 2025 | $11,177.00 (+3.68%) Homeowner's exemption | $961,028 (+4.04%) Land $637,442 Building $323,586 |
| 2023 | $10,780.00 (+0.74%) Homeowner's exemption | $923,713 Land $612,691 Building $311,022 |
| 2022 | $10,701.00 |
Source: FEMA National Flood Hazard Layer, Contra Costa County (06013C), updated October 12, 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Special Flood Hazard Area | No |
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Wildfire Risk | Moderate above 47% of the US · above 28% of California |
|---|---|
| Wildfire Likelihood | About 1 in 1,149 per year |
| Exposure | Indirect within ember reach |
Values are read at the parcel center point; lenders make the official flood determination.
Source: FCC Broadband Data Collection, availability as of December 31, 2025 · Published October 2026 · based on 265 locations within about half a mile of this property
| Provider | Technology | Download / Upload (Mbps) |
|---|---|---|
| Xfinity | Cable | 2,000 / 2,000 |
| Unwired | Fixed Wireless | 300 / 25 |
| Verizon | Fixed Wireless | 300 / 20 |
| Etheric Communications, LLC. | Fixed Wireless (licensed-by-rule) | 250 / 100 |
| AT&T | Fixed Wireless | 100 / 20 |
| AT&T | DSL | 100 / 20 |
May also be available at this address: AT&T, T-Mobile USA. Availability varies by address; speeds are provider-advertised maximums, not measured.
5G and 4G LTE
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