Contra Costa County property record for 304 Warmcastle Ct, Martinez, CA 94553
| Property Type | Condominium |
|---|---|
| Details | 2 bd · 2.5 ba · 1,262 sqft · built 1990 |
| Lot Size | 0.019 acres (835 sqft) |
| Owner | Individual Name on File |
| Last Sale | $145,000 (Apr 1998) |
| Tax Bill | $3,708 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 161-560-021-8 |
| Primary APN | 161-560-021-8 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 6 Rooms |
| Stories | 2 Stories |
| Building Area | 1,262 sqft Living Area |
| 1st Floor Area | 578 sqft |
| 2nd Floor Area | 684 sqft |
| Year Built | Built 1990 |
|---|---|
| Effective Year Built | Effective 1990 |
| Architectural Style | Condo/Apartment |
| Lot Area | 835 sqft (0.019 acres) |
| Garage Type | Attached |
| Garage Area | 228 sqft |
| Parking Spaces | 1 Parking Space |
| Street Address | 304 WARMCASTLE CT |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-6814 |
| Property Category | Residential |
| Property Type | Residential > Condominium / Townhouse > Condominium |
| Legal Description | T6962 U97 |
| Legal Subdivision | SHADOWBROOK |
| Legal Tract | 6962 |
| Legal Lot Number | 7 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 3 |
| Census Block | 3005 |
| Census Tract | 320004 |
304 Warmcastle Ct, a condominium, is owned and occupied by an individual who bought it in April 1998.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 304 WARMCASTLE CT, MARTINEZ, CA 94553-6814 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Single Person |
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 | Name on Deed |
|---|---|
| Last Sale | Apr 21, 1998 · Amount on File |
| Deed Sale | Apr 21, 1998 · Amount on File |
| Prior Sale | Jun 25, 1996 · Amount on File |
| Deed Document Number | 199885077 |
| Prior Transfer Date | Dec 27, 1995 |
| Prior Transfer Doc | 0000001208 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 304 Warmcastle Ct was $3,708 with a homeowner's exemption.
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 | Mount Diablo Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $235,965 (+2%) Land $52,508 Building $183,457 | |
| 2025 | $3,708.00 Homeowner's exemption | $231,339 Land $51,479 Building $179,860 |
| 2023 | $3,502.00 (+2.82%) Homeowner's exemption | $222,358 Land $49,481 Building $172,877 |
| 2022 | $3,406.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 304 Warmcastle Ct in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 1979.
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 Claims | 1 (1979) |
| Most Recent Claim | Oct 1979 · rainfall accumulation |
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.
The area around 304 Warmcastle Ct has no burnable land within ember reach, so its wildfire risk is not rated.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land 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 | CONTRA COSTA WATER DISTRICT serves 210,500 people · EPA ID CA0710003 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jan 2022 |
| Lead | Under 1 ppb (2026–2028) 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 454 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 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: Astound Broadband, AT&T, Verizon.
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