Contra Costa County property record for 1735 Castro St, Martinez, CA 94553
| Property Type | Common Area (Residential) |
|---|---|
| Details | 4 bd · 2 ba · 1,134 sqft · built 1904 |
| Lot Size | 0.115 acres (5,000 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $558,000 (Dec 2024) |
| Tax Bill | $6,219 (2023) |
| Deeds & Mortgages | Apr 2024 Sale & Construction Loan |
| Flood Zone | Zone AO (high risk) |
| APN | 372-276-005-9 |
| Primary APN | 372-276-005-9 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 11 Rooms |
| Stories | 1 Story |
| Building Area | 1,134 sqft Living Area |
| 1st Floor Area | 1,134 sqft |
| Year Built | Built 1904 |
|---|---|
| Effective Year Built | Effective 1922 |
| Lot Area | 5,000 sqft (0.115 acres) |
| Garage Type | Attached |
| Garage Area | 189 sqft |
| Heating System | Central |
|---|
| Street Address | 1735 CASTRO ST |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-2528 |
| Property Category | Other |
| Property Type | Other > Common Area (Residential) |
| Local Zoning Code | R1 |
| Legal Description | 223PM25 PCL A COMMON AREA |
| Legal Subdivision | MARTINEZ |
| Legal Block | 64 |
| Legal Lot Number | 5,6 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2027 |
| Census Tract | 317000 |
1735 Castro St is owned by two individuals who bought it in December 2024.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 611 ROBINSON ST, MARTINEZ, CA 94553-2550 |
| Owner Type | Individual |
| Vesting | Sole Owner |
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 | 2 Names on Deed |
|---|---|
| Last Sale | Dec 23, 2024 · Amount on File |
| Deed Sale | Dec 23, 2024 · Amount on File |
| Prior Sale | Nov 8, 2024 · Amount on File |
| Deed Document Number | 2024136991 |
| Prior Transfer Date | Jun 7, 2010 |
| Prior Transfer Doc | 0000122275 |
| Record Updated | Oct 29, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Apr 5, 2024 |
| Property Address | 1735 CASTRO ST, MARTINEZ, CA 94553-2528 |
| Document Number | 0000031760 |
| Instrument Date | Apr 3, 2024 |
| Instrument | 2024-031760 |
| Transaction Type | Construction Loan |
| Record Updated | Apr 17, 2024 |
| Title Company | FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO |
| Amount | Amount on Record |
|---|---|
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 3139 KATHLEEN ST, SAN JOSE, CA 95124-2130 |
| Document Number | 0000031761 |
|---|---|
| Date | Apr 5, 2024 |
| Instrument | 2024-031761 |
| Name | ANCHOR LOANS INC |
|---|---|
| Type | Mortgage Company |
| Type | Construction Mortgage |
|---|---|
| Amount | Amount on Record |
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 |
|---|---|---|
| 2023 | $6,219.00 (-3.45%) | $432,921 Land $217,305 Building $215,616 |
| 2022 | $6,441.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 1735 Castro 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 1735 Castro 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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