Contra Costa County property record for 300 Warmcastle Ct, Martinez, CA 94553
| Property Type | Condominium |
|---|---|
| Details | 2 bd · 2.5 ba · 1,262 sqft · built 1990 |
| Lot Size | 0.018 acres (787 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $149,500 (Mar 1998) |
| Tax Bill | $3,869 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 161-560-022-6 |
| Primary APN | 161-560-022-6 |
|---|---|
| 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 | 787 sqft (0.018 acres) |
| Garage Type | Attached |
| Garage Area | 228 sqft |
| Parking Spaces | 1 Parking Space |
| Street Address | 300 WARMCASTLE CT |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-6814 |
| Property Category | Residential |
| Property Type | Residential > Condominium / Townhouse > Condominium |
| Legal Description | T6962 U98 |
| 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 |
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 | 584 RIVINGTON ST, ASTORIA, OR 97103-5930 |
| Owner Type | Individual |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Mar 31, 1998 · Amount on Record |
| Deed Sale | Mar 31, 1998 · Amount on Record |
| Deed Document Number | 199868005 |
| Last Transfer Date | Nov 23, 2005 |
| Transfer Doc | 0000457017 |
| 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 | Mount Diablo Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $243,458 (+2%) Land $52,508 Building $190,950 | |
| 2025 | $3,869.00 (+5.71%) | $238,685 (+4.04%) Land $51,479 Building $187,206 |
| 2023 | $3,660.00 (+2.69%) | $229,419 Land $49,481 Building $179,938 |
| 2022 | $3,564.00 |
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 |
| 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.
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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