Contra Costa County property record for 40 Foster St, Martinez, CA 94553
| Property Type | Quadplex |
|---|---|
| Details | 3,312 sqft · built 1964 |
| Lot Size | 0.128 acres (5,555 sqft) |
| Owner | Company Name on Record |
| Last Sale | $955,000 (Jul 2026) |
| Tax Bill | $7,606 (2025) |
| Deeds & Mortgages | Jul 2026 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 372-051-015-9 |
| Primary APN | 372-051-015-9 |
|---|---|
| Alternative APN |
|
| Total Rooms | 4 Rooms |
|---|---|
| Stories | 1 Story |
| Building Area | 3,312 sqft Living Area |
| 1st Floor Area | 3,312 sqft |
| Year Built | Built 1964 |
|---|---|
| Effective Year Built | Effective 1964 |
| Architectural Style | Quadruplex |
| Lot Area | 5,555 sqft (0.128 acres) |
| Garage Type | Carport |
| Carport | Carport |
| Parking Spaces | 4 Parking Spaces |
| Street Address | 40 FOSTER ST |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-1053 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Quadplex |
| Legal Description | ORIG SURVEY MTZ POR LOTS 9 & 10 BLK 6 |
| Legal Subdivision | MARTINEZ CENTER 01 |
| Legal Block | 6 |
| Legal Lot Number | 9,10 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2009 |
| Census Tract | 318000 |
Source: Contra Costa County records, as of August 7, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on Record |
|---|---|
| Mailing Address | 1599 ALAMO WAY, ALAMO, CA 94507-1502 |
| Owner Type | Company |
| Vesting | Limited Liability Partnership |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Jul 31, 2026 · Amount on Record |
| Deed Sale | Jul 31, 2026 · Amount on Record |
| Prior Sale | Sep 4, 1998 · Amount on Record |
| Deed Document Number | 202680688 |
| Prior Transfer Date | Jul 1, 2014 |
| Prior Transfer Doc | 0000108597 |
| Record Updated | Oct 29, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Jul 31, 2026 |
| Property Address | 40 FOSTER ST, MARTINEZ, CA 94553-1053 |
| Document Number | 0000080688 |
| Instrument Date | Jul 16, 2026 |
| Instrument | 202680688 |
| Transaction Type | Transfer |
| Record Updated | Aug 27, 2026 |
| Title Company | FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE COMPAN |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $106,100.50 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Limited Liability Partnership |
| Address | 1599 ALAMO WAY, ALAMO, CA 94507-1502 |
| Document Number | 0000080689, |
|---|---|
| Date | Jul 31, 2026 |
| Instrument | 202680689 |
| Name | AXOS BANK |
|---|
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | Aug 1, 2056 |
| Rate Type | Adjustable Rate |
|---|---|
| Rate | 7.5% |
| Initial Type | Adjustable Rate |
| Adjustable | Adjustable Rate Rider |
| Max Rate | -1% |
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 | $398,139 (+2%) Land $95,929 Building $302,210 | |
| 2025 | $7,606.00 (+3.98%) | $390,334 (+4.04%) Land $94,049 Building $296,285 |
| 2023 | $7,315.00 (-0.72%) | $375,179 Land $90,398 Building $284,781 |
| 2022 | $7,368.00 |
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 | 3 in force |
| Nearby Flood Claims | 5 (1982–2017) |
| Claims Outside the SFHA | 4 of 5 |
| Most Recent Claim | Jan 2017 · Severe Winter Storms, Flooding, And Mudslides |
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 | Moderate above 67% of the US · above 42% of California |
|---|---|
| Wildfire Likelihood | 0.2% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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 41 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Astound Broadband Fiber · Cable in parts of the area | 1,500 / 1,500 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
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