Contra Costa County property record for 845 Corte Briones, Martinez, CA 94553
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 4 ba · 4,024 sqft · built 1979 |
| Lot Size | 0.883 acres (38,475 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $650,000 (May 2001) |
| Tax Bill | $13,610 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 365-150-061-7 |
| Primary APN | 365-150-061-7 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 4 Baths |
| Total Rooms | 11 Rooms |
| Stories | 1 Story |
| Building Area | 4,024 sqft Living Area |
| 1st Floor Area | 4,024 sqft |
| Year Built | Built 1979 |
|---|---|
| Effective Year Built | Effective 1981 |
| Lot Area | 38,475 sqft (0.883 acres) |
| Garage Type | Attached |
| Garage Area | 286 sqft |
| Parking Spaces | 1 Parking Space |
| Street Address | 845 CORTE BRIONES |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-5950 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R20 |
| Legal Description | PCL MAP 68 PG 38 PCL C |
| Legal Tract | 68PM38 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2002 |
| Census Tract | 347000 |
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 | Individual Name on Record |
|---|---|
| Mailing Address | 845 CORTE BRIONES, MARTINEZ, CA 94553-5950 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Single Person |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | May 1, 2001 · Amount on Record |
| Deed Sale | May 1, 2001 · Amount on Record |
| Prior Sale | Oct 8, 1998 · Amount on Record |
| Deed Document Number | 2001112031 |
| Last Transfer Date | Mar 25, 2014 |
| Transfer Doc | 0000045459 |
| Record Updated | Sep 20, 2026 |
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 | $1,193,158 (+13.94%) Land $428,537 Building $764,621 | |
| 2025 | $13,610.00 (+9.16%) | $1,047,215 (+4.04%) Land $420,135 Building $627,080 |
| 2023 | $12,468.00 (+1.7%) | $1,006,553 Land $403,822 Building $602,731 |
| 2022 | $12,260.00 |
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 |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 1 in force |
| Nearby Flood Claims | 1 (1986) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Feb 1986 · Severe Storms & Flooding |
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 | High above 70% of the US · above 45% of California |
|---|---|
| Wildfire Likelihood | 0.4% annual chance |
| Exposure | Direct burnable vegetation |
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 203 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| AT&T DSL | 100 / 20 |
May also be available: T-Mobile.
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