Contra Costa County property record for 423 H St, Martinez, CA 94553 · Last verified July 2026
| Property Type | Residential > Single Family > Home |
|---|---|
| Bedrooms | 2 Beds |
| Bathrooms | 1 Baths |
| Year Built | Built 1958 |
| Square Footage | 993 sqft Living Area |
| Lot Size | 3,960 sqft (0.091 acres) |
| Occupancy | Owner Occupied |
| Last Sale | $230,000 (2011) |
| Tax Bill | $4,420.00 (2025) |
Source: Contra Costa County records · APN 370-082-013-1
Assessment roll updated July 14, 2026 · Last verified July 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 423 H ST, MARTINEZ, CA 94553-3710 |
| Occupancy | Owner Occupied |
| Owner Type | Owner is an Individual, Couple or Unincorporated Entity |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | Mar 01, 2011 · Amount on Record |
| Deed Sale | Mar 01, 2011 · Amount on Record |
| Prior Sale | Aug 11, 2005 · Amount on Record |
| Deed Doc Number | 201144437 |
| Prior Transfer Date | Aug 08, 2005 |
| Prior Transfer Doc | 0000301289 |
| Record Refreshed | Sep 20, 2026 |
Source: Contra Costa County records · Assessment roll updated July 14, 2026 · Last verified July 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Martinez City |
| Unified School District | Martinez Unified School District (KG - 12) |
Assessed value is set for property tax purposes and is not a market price estimate.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $300,553 (+2%) Land $241,753 Building $58,800 | |
| 2025 | $4,420.00 (+6.45%) | $294,661 (+4.04%) Land $237,013 Building $57,648 |
| 2023 | $4,152.00 (+1.57%) | $283,220 Land $227,810 Building $55,410 |
| 2022 | $4,088.00 |
Source: FEMA National Flood Hazard Layer, Contra Costa County (06013C), updated October 12, 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified: October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Flood Hazard | Moderate |
| 500-Year Floodplain | Yes |
| Special Flood Hazard Area | No |
| Nearest Special Flood Hazard Area | Zone AO, within 100 ft |
| Wildfire Risk | Moderate above 60% of the US · above 36% of California |
|---|---|
| Wildfire Likelihood | About 1 in 625 per year |
| Exposure | Indirect within ember reach |
Values are read at the parcel center point; lenders make the official flood determination.
| Primary APN | 370-082-013-1 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Baths |
| Total Rooms | 5 Rooms |
| Building Area | 993 sqft Living Area |
| 1st Floor | 993 sqft 1st Floor |
| Stories | 1 Stories |
| Year Built | Built 1939 |
|---|---|
| Effective Year Built | Effective 1958 |
| Architectural Style | Traditional Style |
| Exterior Material | Wood Siding Exterior |
| Construction Type | Frame Construction |
| Roof Material | Composition Shingle Roof |
| Lot Area | 3,960 sqft (0.091 acres) |
| Parking Spaces | 1 Parking Spaces |
| Garage Type | Attached Garage |
| Garage Area | 324 sqft Garage |
| Heating System | Floor/Wall Furnace Heating |
|---|---|
| Sewage | Municipal Sewage |
| Water Source | Commercial Water Source |
| Street Address | 423 H ST |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-3710 |
| Property Usage | Residential Property Usage |
| Type | Residential > Single Family > Home |
| Legal Description | MUIR MANOR 34 |
| Legal Subdivision | MUIR MANOR |
| Legal Lot Number | 34 |
| Jurisdiction | CONTRA COSTA CA |
| Minor Civil Division | CENTRAL CONTRA COSTA |
| Census Blockgroup | 3 |
| Census Block | 3012 |
| Census Tract | 318000 |
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