Contra Costa County property record for 921 Walnut St, Martinez, CA 94553
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 722 sqft · built 1937 |
| Lot Size | 0.119 acres (5,198 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $130,000 (Sep 2011) |
| Tax Bill | $2,804 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 375-051-011-1 |
| Primary APN | 375-051-011-1 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 4 Rooms |
| Stories | 1 Story |
| Building Area | 722 sqft Living Area |
| 1st Floor Area | 722 sqft |
| Year Built | Built 1937 |
|---|---|
| Effective Year Built | Effective 1955 |
| Architectural Style | Bungalow |
| Exterior Material | Wood Siding |
| Roof Material | Composition Shingle |
| Lot Area | 5,198 sqft (0.119 acres) |
| Lot Dimensions | 113 ft deep x 45 ft wide |
| Heating System | Floor/Wall Furnace |
|---|---|
| Heating Fuel | Gas |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 921 WALNUT ST |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-2737 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | MARTINEZ LAND CO #6 POR 4&5 34 |
| Legal Subdivision | MARTINEZ LAND CO 06 |
| Legal Block | 34 |
| Legal Lot Number | 4,5 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1013 |
| Census Tract | 319002 |
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 | Individual Name on Record |
|---|---|
| Mailing Address | 921 WALNUT ST, MARTINEZ, CA 94553-2737 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Sep 29, 2011 · Amount on Record |
| Deed Sale | Sep 29, 2011 · Amount on Record |
| Prior Sale | Jun 20, 2011 · Amount on Record |
| Deed Document Number | 2011201003 |
| Prior Transfer Date | Jan 14, 2004 |
| Prior Transfer Doc | 0000023034 |
| 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 | Martinez City |
| Unified School District | Martinez Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $166,538 (+2%) Land $83,269 Building $83,269 | |
| 2025 | $2,804.00 (+6.53%) Homeowner's exemption | $163,274 (+4.04%) Land $81,637 Building $81,637 |
| 2023 | $2,632.00 (+1.5%) Homeowner's exemption | $156,936 Land $78,468 Building $78,468 |
| 2022 | $2,593.00 |
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 |
| 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.
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 | CITY OF MARTINEZ serves 31,015 people · EPA ID CA0710006 |
|---|---|
| Water Source | Purchased surface water from CONTRA COSTA WATER DISTRICT |
| Last State Inspection | Oct 2025 |
| 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 765 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · DSL · Fixed Wireless in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Astound Broadband Fiber | 1,500 / 1,500 |
| Unwired Fixed Wireless | 300 / 25 |
May also be available: T-Mobile, Verizon.
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