Contra Costa County property record for 257 Trinity Ave, Kensington, CA 94708
| Property Type | Duplex |
|---|---|
| Details | 4 bd · 3 ba · 1,904 sqft · built 1929 |
| Lot Size | 0.092 acres (4,000 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $750,000 (Jul 2014) |
| Tax Bill | $14,087 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 570-142-025-8 |
| Primary APN | 570-142-025-8 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 10 Rooms |
| Stories | 1 Story |
| Building Area | 1,904 sqft Living Area |
| 1st Floor Area | 1,440 sqft |
| Basement Area | 464 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1929 |
|---|---|
| Effective Year Built | Effective 1950 |
| Architectural Style | Duplex Single |
| Exterior Material | Stucco |
| Construction Type | Frame |
| Roof Type | Gable |
| Roof Material | Composition Shingle |
| Lot Area | 4,000 sqft (0.092 acres) |
| Lot Dimensions | 100 ft deep x 40 ft wide |
| View / Lot | Bayou |
| Garage Type | Attached |
| Garage Area | 324 sqft |
| Parking Spaces | 1 Parking Space |
| Heating System | Floor/Wall Furnace |
|---|---|
| Heating Fuel | Gas |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 257 TRINITY AVE |
|---|---|
| City | KENSINGTON |
| State | CA |
| Zip | 94708-1138 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Local Zoning Code | R6 |
| Legal Description | BERKELEY HIGHLANDS ADDN 39 O |
| Legal Subdivision | BERKELEY HIGHLANDS ADD |
| Legal Block | O |
| Legal Lot Number | 39 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | WEST CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2002 |
| Census Tract | 392000 |
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 | 257 TRINITY AVE, KENSINGTON, CA 94708-1138 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Community Property |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jul 21, 2014 · Amount on Record |
| Deed Sale | Jul 21, 2014 · Amount on Record |
| Deed Document Number | 2014119589 |
| Record Updated | Sep 20, 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 | $919,406 (+2%) Land $674,232 Building $245,174 | |
| 2025 | $14,087.00 (+4.05%) | $901,379 (+4.04%) Land $661,012 Building $240,367 |
| 2023 | $13,539.00 (+1.25%) | $866,379 Land $635,345 Building $231,034 |
| 2022 | $13,372.00 |
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 | 5 in force |
| Nearby Flood Claims | 4 (1982–2023) |
| Claims Outside the SFHA | 1 of 4 |
| Most Recent Claim | Mar 2023 · Severe Storm And 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 | Low lower than 62% of the US · lower than 77% of California |
|---|---|
| Wildfire Likelihood | 0.05% 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 979 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · Fixed Wireless, DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 1,200 / 35 |
| Sonic Telecom Fiber | 1,000 / 1,000 |
| Unwired Fixed Wireless | 300 / 25 |
| Etheric Networks Fixed Wireless | 250 / 100 |
May also be available: GeoLinks, T-Mobile, Verizon.
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