Contra Costa County property record for 317 Main St, Martinez, CA 94553
| Property Type | Multi-Family Dwellings |
|---|---|
| Details | 2,516 sqft · built 1927 |
| Lot Size | 0.115 acres (5,000 sqft) |
| Owner | 2 Company Names on Record |
| Last Sale | $492,500 (Sep 2014) |
| Tax Bill | $9,963 (2025) |
| Deeds & Mortgages | Jul 2021 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 373-221-008-7 |
| Primary APN | 373-221-008-7 |
|---|---|
| Alternative APN |
|
| Total Rooms | 4 Rooms |
|---|---|
| Stories | 1 Story |
| Building Area | 2,516 sqft Living Area |
| Gross Area | 619 sqft |
| 1st Floor Area | 619 sqft |
| Year Built | Built 1927 |
|---|---|
| Effective Year Built | Effective 1927 |
| Architectural Style | Multi-Family |
| Lot Area | 5,000 sqft (0.115 acres) |
| Street Address | 317 MAIN ST |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-1543 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Multi-Family Dwellings |
| Legal Description | ORIGINAL SURVEY LOT 6 BLK 17 |
| Legal Subdivision | MARTINEZ |
| Legal Block | 17 |
| Legal Lot Number | 6 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1050 |
| Census Tract | 316000 |
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 | 2 Company Names on Record |
|---|---|
| Mailing Address | 650 35TH AVE, SANTA CRUZ, CA 95062-5113 |
| Owner Type | Company |
| Vesting | Trust, Revocable Trust |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Sep 12, 2014 · Amount on Record |
| Deed Sale | Sep 12, 2014 · Amount on Record |
| Deed Document Number | 2014155288 |
| Last Transfer Date | Jul 2, 2025 |
| Transfer Doc | 0000068858 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 317 MAIN ST, MARTINEZ, CA 94553-1543 |
| Transaction Type | Mortgage |
| Record Updated | Sep 28, 2023 |
| Name | Verified Name |
|---|---|
| Address | 3300 SAN FERNANDO RD, ATASCADERO, CA 93422-7751 |
| Document Number | 0000192620 |
|---|---|
| Date | Jul 7, 2021 |
| Instrument | 2021-192620 |
| Name | GUARANTEED RATE INC |
|---|---|
| Type | Mortgage Company |
| Address | CHICAGO, IL 60613 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Aug 1, 2051 |
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 | $603,737 (+2%) Land $306,466 Building $297,271 | |
| 2025 | $9,963.00 (+4.58%) | $591,900 (+4.04%) Land $300,457 Building $291,443 |
| 2023 | $9,527.00 (-0.15%) | $568,918 Land $288,791 Building $280,127 |
| 2022 | $9,541.00 |
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 |
|---|---|
| Nearest Special Flood Hazard Area | Zone AO, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on Record median of 42 policies |
| Nearby Flood Policies | 42 in force |
| Nearby Flood Claims | 20 (1982–2017) |
| Claims Outside the SFHA | 4 of 20 |
| Most Recent Claim | Jan 2017 · Severe Winter Storms, Flooding, And Mudslides |
| 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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 58% of the US · lower than 65% 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 371 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Astound Broadband Fiber · Cable in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 2,000 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| AT&T Fixed Wireless · DSL | 100 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
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