Contra Costa County property record for 4861 Cornflower St, San Ramon, CA 94582
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3.5 ba · 2,231 sqft · built 2011 |
| Lot Size | 0.069 acres (3,024 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $660,000 (Nov 2011) |
| Tax Bill | $12,149 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 222-510-027-6 |
| Primary APN | 222-510-027-6 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 8 Rooms |
| Stories | 2 Stories |
| Building Area | 2,231 sqft Living Area |
| 1st Floor Area | 884 sqft |
| 2nd Floor Area | 1,347 sqft |
| Year Built | Built 2011 |
|---|---|
| Effective Year Built | Effective 2011 |
| Architectural Style | Cluster |
| Lot Area | 3,024 sqft (0.069 acres) |
| Garage Type | Attached |
| Garage Area | 462 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 4861 CORNFLOWER ST |
|---|---|
| City | SAN RAMON |
| State | CA |
| Zip | 94582-5836 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T8952 L75 |
| Legal Subdivision | GALE RANCH |
| Legal Tract | 8952 |
| Legal Lot Number | 75 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | TASSAJARA |
| Census Block Group | 2 |
| Census Block | 2026 |
| Census Tract | 355115 |
4861 Cornflower St is owned and occupied by two individuals who bought it in November 2011.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 4861 CORNFLOWER ST, SAN RAMON, CA 94582-5836 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Community Property |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Nov 18, 2011 · Amount on File |
| Deed Sale | Nov 18, 2011 · Amount on File |
| Deed Document Number | 2011251618 |
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 4861 Cornflower St was $12,149 with a homeowner's exemption.
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | San Ramon City |
| Unified School District | San Ramon Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $845,562 (+2%) Land $390,752 Building $454,810 | |
| 2025 | $12,149.00 Homeowner's exemption | $828,984 Land $383,091 Building $445,893 |
| 2023 | $11,635.00 (+1.62%) Homeowner's exemption | $796,795 Land $368,216 Building $428,579 |
| 2022 | $11,449.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 4861 Cornflower St in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective October 12, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 2 in force |
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
Wildfire risk around 4861 Cornflower St is low, with less than a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 94% of the US · lower than 96% of California |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | None beyond ember reach |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | DUBLIN SAN RAMON SERVICES DISTRICT serves 98,776 people · EPA ID CA0110009 |
|---|---|
| Water Source | Purchased surface water from ZONE 7 WATER AGENCY |
| Last State Inspection | Sep 2024 |
| Lead | Under 1 ppb (2023–2025) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.
Source: FCC Broadband Data Collection, based on 713 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · Fixed Wireless in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 2,000 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| Sail Internet Fixed Wireless · DSL in parts of the area | 200 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
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