Contra Costa County property record for 525 Brown St, Martinez, CA 94553
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 728 sqft · built 1929 |
| Lot Size | 0.046 acres (2,000 sqft) |
| Owner | Trust Name on File |
| Last Sale | $220,000 (Oct 2001) |
| Tax Bill | $4,773 (2025) |
| Flood Zone | Zone AO (high risk) |
| APN | 372-294-010-7 |
| Primary APN | 372-294-010-7 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 5 Rooms |
| Stories | 1 Story |
| Building Area | 728 sqft Living Area |
| 1st Floor Area | 728 sqft |
| Year Built | Built 1929 |
|---|---|
| Effective Year Built | Effective 1929 |
| Lot Area | 2,000 sqft (0.046 acres) |
| Garage Type | Attached |
| Garage Area | 180 sqft |
| Parking Spaces | 1 Parking Space |
| Street Address | 525 BROWN ST |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-2520 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1 |
| Legal Description | ORIGINAL SURVEY POR 7 72 |
| Legal Subdivision | MARTINEZ |
| Legal Block | 72 |
| Legal Lot Number | 7,8 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2029 |
| Census Tract | 317000 |
525 Brown St is held in a trust since October 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 | Trust Name on File |
|---|---|
| Mailing Address | 3531 E ST JAMES AVE, HAYDEN, ID 83835-7589 |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Oct 31, 2001 · Amount on File |
| Deed Sale | Oct 31, 2001 · Amount on File |
| Deed Document Number | 2001333425 |
| Last Transfer Date | Oct 3, 2016 |
| Transfer Doc | 0000232445 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 525 Brown St was $4,773.
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 | $331,479 (+2%) Land $135,601 Building $195,878 | |
| 2025 | $4,773.00 | $324,981 Land $132,943 Building $192,038 |
| 2023 | $4,484.00 (+1.59%) | $312,364 Land $127,782 Building $184,582 |
| 2022 | $4,414.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 525 Brown St 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 70 policies |
| Nearby Flood Policies | 70 in force |
| Nearby Flood Claims | 51 (1980–2018) |
| Claims Outside the SFHA | 1 of 51 |
| Most Recent Claim | Sep 2018 |
| 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 525 Brown St is moderate, ranking above 48% of the US, with a 0.1% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 48% of the US · lower than 71% of California |
|---|---|
| Wildfire Likelihood | 0.1% annual chance |
| Exposure | Indirect within 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 853 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · DSL | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Astound Broadband Fiber · Cable in parts of the area | 1,500 / 1,500 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: Unwired.
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