Contra Costa County property record for 239 Sierra Ct, Martinez, CA 94553
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 2.5 ba · 2,362 sqft · built 1969 |
| Lot Size | 0.165 acres (7,200 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $890,000 (Dec 2025) |
| Tax Bill | $2,229 (2025) |
| Deeds & Mortgages | Dec 2025 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 164-261-027-1 |
| Primary APN | 164-261-027-1 |
|---|---|
| Alternative APN |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 10 Rooms |
| Stories | 2 Stories |
| Building Area | 2,362 sqft Living Area |
| 1st Floor Area | 1,130 sqft |
| 2nd Floor Area | 1,232 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1969 |
|---|---|
| Effective Year Built | Effective 1970 |
| Lot Area | 7,200 sqft (0.165 acres) |
| Garage Type | Attached |
| Garage Area | 469 sqft |
| Parking Spaces | 2 Parking Spaces |
| Heating System | Forced Air with A/C |
|---|
| Street Address | 239 SIERRA CT |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-6228 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R75 |
| Legal Description | TRACT 3302 LOT 45 |
| Legal Subdivision | AMENDED MAP OF SUBDIVISION 3302 |
| Legal Tract | 3302 |
| Legal Lot Number | 45 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1022 |
| Census Tract | 321103 |
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 | 2 Individual Names on Record |
|---|---|
| Mailing Address | 239 SIERRA CT, MARTINEZ, CA 94553-6228 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Community Property |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Dec 19, 2025 · Amount on Record |
| Deed Sale | Dec 19, 2025 · Amount on Record |
| Deed Document Number | 2025141539 |
| Prior Transfer Date | Oct 26, 2000 |
| Prior Transfer Doc | 0000276489 |
| Record Updated | Oct 29, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Dec 19, 2025 |
| Property Address | 239 SIERRA CT, MARTINEZ, CA 94553-6228 |
| Document Number | 0000141539 |
| Map Reference | MB 103 PG 28 |
| Instrument Date | Dec 11, 2025 |
| Instrument | 2025- 141539 |
| Transaction Type | Transfer |
| Record Updated | Jan 5, 2026 |
| Title Company | OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Community Property |
| Address | 239 SIERRA CT, MARTINEZ, CA 94553-6228 |
| Document Number | 0000141540 |
|---|---|
| Date | Dec 19, 2025 |
| Instrument | 2025- 141540 |
| Name | A&D MORTGAGE LLC |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Jan 1, 2056 |
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 | $890,000 (+686.3%) Land $515,000 Building $375,000 | |
| 2025 | $2,229.00 (+8.89%) | $113,189 (+4.04%) Land $31,245 Building $81,944 |
| 2023 | $2,047.00 (+0.89%) Homeowner's exemption | $108,796 Land $30,033 Building $78,763 |
| 2022 | $2,029.00 |
Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.
Source: FEMA National Flood Hazard Layer, effective October 12, 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 67% of the US · lower than 81% of California |
|---|---|
| Wildfire Likelihood | 0.03% annual chance |
| Exposure | None beyond 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 |
| Also Mapped Here | EAST BAY MUD |
| 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 463 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 |
| AT&T DSL · Fiber in parts of the area | 100 / 20 |
May also be available: Astound Broadband, Verizon.
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