Contra Costa County property record for 521 Palm Ave, Martinez, CA 94553
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 869 sqft · built 1950 |
| Lot Size | 0.154 acres (6,720 sqft) |
| Owner | Individual Name on File |
| Last Sale | $350,000 (Jul 2016) |
| Tax Bill | $5,901 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 376-101-010-1 |
| Primary APN | 376-101-010-1 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 5 Rooms |
| Stories | 1 Story |
| Building Area | 869 sqft Living Area |
| Gross Area | 1,136 sqft |
| 1st Floor Area | 869 sqft |
| Year Built | Built 1950 |
|---|---|
| Effective Year Built | Effective 1960 |
| Exterior Material | Wood Siding |
| Construction Type | Frame |
| Lot Area | 6,720 sqft (0.154 acres) |
| Garage Type | Attached |
| Garage Area | 267 sqft |
| Parking Spaces | 1 Parking Space |
| Heating System | Forced Air with A/C |
|---|---|
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 521 PALM AVE |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-4021 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R6 |
| Legal Description | ALHAMBRA OAKS #1 LOT 38 |
| Legal Subdivision | ALHAMBRA OAKS #1 |
| Legal Lot Number | 38 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 3 |
| Census Block | 3015 |
| Census Tract | 319002 |
521 Palm Ave is owned and occupied by an individual who bought it in July 2016.
Source: Contra Costa County records, as of July 14, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 521 PALM AVE, MARTINEZ, CA 94553-4021 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Single Person |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Jul 8, 2016 · Amount on File |
| Deed Sale | Jul 8, 2016 · Amount on File |
| Prior Sale | Nov 29, 2012 · Amount on File |
| Deed Document Number | 2016134743 |
| Prior Transfer Date | Jul 5, 2016 |
| Prior Transfer Doc | 0000134742 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 521 Palm Ave was $5,901 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 | Martinez City |
| Unified School District | Martinez Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $414,322 (+2%) Land $330,630 Building $83,692 | |
| 2025 | $5,901.00 Homeowner's exemption | $406,199 Land $324,148 Building $82,051 |
| 2023 | $5,501.00 (+2.84%) Homeowner's exemption | $390,428 Land $311,562 Building $78,866 |
| 2022 | $5,349.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 521 Palm Ave in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective October 12, 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Wildfire risk around 521 Palm Ave is low, with 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 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 589 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL · Fiber in parts of the area | 100 / 20 |
May also be available: Astound Broadband.
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