Contra Costa County property record for 4202 Alhambra Ave, Martinez, CA 94553
| Property Type | Federal Property (Exempt) |
|---|---|
| Lot Size | 8.8 acres (383,415 sqft) |
| Owner | Company Name on File |
| Flood Zone | Zone AO (high risk) |
| APN | 370-050-041 |
| Primary APN | 370-050-041 |
|---|---|
| Alternative APN |
|
| Lot Area | 383,415 sqft |
|---|
| Street Address | 4202 ALHAMBRA AVE |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-3826 |
| Property Category | Public Works |
| Property Type | Public Works > Federal Property (Exempt) |
| Legal Description | POR RO EL PINOLE |
| Legal Subdivision | RO EL PINOLE |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 3 |
| Census Block | 3025 |
| Census Tract | 318000 |
Source: NPS National Register of Historic Places, as of August 1, 2026
| Historic District | Within the John Muir National Historic Site listed 1966 · 5 contributing resources · National Historic Landmark (designated 1962) · NRIS 66000083 |
|---|---|
| Individually Listed | John Muir National Historic Site listed 1966 · 5 contributing resources · National Historic Landmark (designated 1962) · NRIS 66000083 |
| Listed Area | Within Port Chicago Naval Magazine National Memorial listed 2009 · NRIS 11000237 |
Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.
4202 Alhambra Ave, a public works property, is owned by a company.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 600 HARRISON ST, SAN FRANCISCO, CA 94107-1387 |
| Owner Type | Company |
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 | Name on Deed |
|---|---|
| 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 | Assessed Value |
|---|---|
| 2026 | $500,109 Land $330,090 Building $170,019 |
| 2023 | $471,266 Land $311,052 Building $160,214 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 4202 Alhambra Ave in Zone AO, a high-risk flood area; flood insurance is required for federally backed loans.
Source: FEMA National Flood Hazard Layer, effective October 12, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone AO high risk · sheet flow 1–3 ft |
|---|---|
| 100-Year Floodplain | Yes 1% annual chance |
| Floodway | No |
| Base Flood Elevation | Varies along the reach; see FIRM |
| Flood Insurance Requirement | Required federally backed loans |
| Flood Insurance Cost | Premium on File median of 109 policies |
| Nearby Flood Policies | 109 in force |
| Nearby Flood Claims | 32 (1980–2019) |
| Claims Outside the SFHA | 3 of 32 |
| Most Recent Claim | Feb 2019 |
| Claims by Event |
|
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 4202 Alhambra Ave is moderate, ranking above 64% of the US, with a 0.2% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 64% of the US · lower than 60% of California |
|---|---|
| Wildfire Likelihood | 0.2% annual chance |
| Exposure | Direct burnable vegetation |
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 212 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| AT&T Fixed Wireless · DSL | 100 / 20 |
May also be available: Astound Broadband, T-Mobile, Unwired, Verizon.
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