Contra Costa County property record for 490 Walnut Ave, Walnut Creek, CA 94598
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2.5 ba · 2,161 sqft · built 1964 |
| Lot Size | 0.36 acres (15,681 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $540,000 (Aug 2009) |
| Tax Bill | $8,494 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 142-311-006-1 |
| Primary APN | 142-311-006-1 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 9 Rooms |
| Stories | 1 Story |
| Building Area | 2,161 sqft Living Area |
| 1st Floor Area | 2,161 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1964 |
|---|---|
| Effective Year Built | Effective 1964 |
| Architectural Style | Ranch |
| Exterior Material | Stucco |
| Roof Material | Wood Shingle |
| Lot Area | 15,681 sqft (0.36 acres) |
| Garage Type | Attached |
| Garage Area | 540 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 490 WALNUT AVE |
|---|---|
| City | WALNUT CREEK |
| State | CA |
| Zip | 94598-3751 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R10 |
| Legal Description | POR RO SAN MIGUEL |
| Legal Subdivision | SAN MIGUEL RHO |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2008 |
| Census Tract | 338301 |
Source: Contra Costa County records, as of July 14, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on Record |
|---|---|
| Mailing Address | 490 WALNUT AVE, WALNUT CREEK, CA 94598-3751 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Community Property |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Aug 20, 2009 · Amount on Record |
| Deed Sale | Aug 20, 2009 · Amount on Record |
| Prior Sale | Jun 4, 2009 · Amount on Record |
| Deed Document Number | 2009201954 |
| Prior Transfer Date | Mar 29, 2007 |
| Prior Transfer Doc | 0000097695 |
| Record Updated | Oct 29, 2026 |
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Walnut Creek City |
| Unified School District | Mount Diablo Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $710,971 (+2%) Land $394,985 Building $315,986 | |
| 2025 | $8,494.00 (+4.17%) Homeowner's exemption | $697,032 (+4.04%) Land $387,241 Building $309,791 |
| 2023 | $8,154.00 (+0.89%) Homeowner's exemption | $669,967 Land $372,205 Building $297,762 |
| 2022 | $8,082.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
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 8 (10% premium discount) |
| Nearby Flood Policies | 1 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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 80% of the US · lower than 88% of California |
|---|---|
| Wildfire Likelihood | 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 | CONTRA COSTA WATER DISTRICT serves 210,500 people · EPA ID CA0710003 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jan 2022 |
| Lead | Under 1 ppb (2026–2028) 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 428 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Astound Broadband Cable | 1,500 / 50 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL | 100 / 20 |
May also be available: Sonic Telecom.
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