Contra Costa County property record for 5409 Martis Ct, El Sobrante, CA 94803
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 2,290 sqft · built 1978 |
| Lot Size | 0.203 acres (8,856 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $388,000 (May 2010) |
| Tax Bill | $7,719 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 435-100-038-7 |
| Primary APN | 435-100-038-7 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 10 Rooms |
| Stories | 2 Stories |
| Building Area | 2,290 sqft Living Area |
| 1st Floor Area | 1,353 sqft |
| 2nd Floor Area | 580 sqft |
| Basement Area | 357 sqft |
| Year Built | Built 1978 |
|---|---|
| Effective Year Built | Effective 1982 |
| Lot Area | 8,856 sqft (0.203 acres) |
| Garage Type | Attached |
| Garage Area | 441 sqft |
| Parking Spaces | 2 Parking Spaces |
| Heating System | Central |
|---|
| Street Address | 5409 MARTIS CT |
|---|---|
| City | EL SOBRANTE |
| State | CA |
| Zip | 94803-3441 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R6 |
| Legal Description | T04997 L0022 B |
| Legal Tract | 04997 |
| Legal Lot Number | 22 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | WEST CONTRA COSTA |
| Census Block Group | 3 |
| Census Block | 3003 |
| Census Tract | 361000 |
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 | 5409 MARTIS CT, EL SOBRANTE, CA 94803-3441 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Single Person |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | May 19, 2010 · Amount on Record |
| Deed Sale | May 19, 2010 · Amount on Record |
| Prior Sale | Apr 21, 2006 · Amount on Record |
| Deed Document Number | 201099804 |
| Prior Transfer Date | Jan 27, 1994 |
| Prior Transfer Doc | 0000034213 |
| Record Updated | Oct 29, 2026 |
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Unified School District | West Contra Costa Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $510,841 (+2%) Land $243,572 Building $267,269 | |
| 2025 | $7,719.00 (+4.54%) | $500,826 (+4.04%) Land $238,797 Building $262,029 |
| 2023 | $7,384.00 (+1.4%) | $481,380 Land $229,525 Building $251,855 |
| 2022 | $7,282.00 |
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 | 2 (2010–2016) |
| Claims Outside the SFHA | 2 of 2 |
| Most Recent Claim | Apr 2016 · 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 | Moderate above 45% of the US · lower than 73% of California |
|---|---|
| Wildfire Likelihood | 0.07% annual chance |
| Exposure | Indirect 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 | EAST BAY MUD serves 1,468,000 people · EPA ID CA0110005 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Dec 2021 |
| Lead | Under 1 ppb (2022–2024) 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. This system sells water to local utilities; the supplier billing this address may be one of them.
Source: FCC Broadband Data Collection, based on 281 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, Fixed Wireless in parts of the area | 100 / 20 |
May also be available: Verizon.
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