Contra Costa County property record for 845 Walnut Ave, Walnut Creek, CA 94598
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 2,096 sqft · built 1965 |
| Lot Size | 0.269 acres (11,700 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $1,268,000 (Oct 2024) |
| Tax Bill | $14,881 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 139-231-001-5 |
| Primary APN | 139-231-001-5 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 11 Rooms |
| Stories | 2 Stories |
| Building Area | 2,096 sqft Living Area |
| 1st Floor Area | 1,326 sqft |
| 2nd Floor Area | 770 sqft |
| Year Built | Built 1965 |
|---|---|
| Effective Year Built | Effective 1965 |
| Lot Area | 11,700 sqft (0.269 acres) |
| Garage Type | Attached |
| Garage Area | 475 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 845 WALNUT AVE |
|---|---|
| City | WALNUT CREEK |
| State | CA |
| Zip | 94598-3736 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R12 |
| Legal Description | TRACT 3424 LOT 48 EX MR |
| Legal Subdivision | BROOKTREE 3 SUB 3424 |
| Legal Tract | 3424 |
| Legal Lot Number | 48 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1003 |
| Census Tract | 338302 |
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 | 95 MOZDEN LN, PLEASANT HILL, CA 94523-4904 |
| Owner Type | Individual |
| Vesting | Community Property |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Oct 3, 2024 · Amount on Record |
| Deed Sale | Oct 3, 2024 · Amount on Record |
| Prior Sale | Sep 30, 2024 · Amount on Record |
| Deed Document Number | 202497741 |
| Prior Transfer Date | Sep 25, 2024 |
| Prior Transfer Doc | 0000097741 |
| Record Updated | Sep 20, 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 | $1,293,360 (+2%) Land $918,000 Building $375,360 | |
| 2025 | $14,881.00 (+519.01%) | $1,268,000 (+754.63%) Land $900,000 Building $368,000 |
| 2023 | $2,404.00 (+0.92%) | $148,369 Land $45,305 Building $103,064 |
| 2022 | $2,382.00 |
Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.
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 67% of the US · lower than 81% of California |
|---|---|
| Wildfire Likelihood | 0.02% 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.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures