Contra Costa County property record for 3625 Knightsen Ave, Knightsen, CA 94548
| Property Type | Rural Home |
|---|---|
| Details | 4 bd · 2.5 ba · 2,180 sqft · built 1971 |
| Lot Size | 2.41 acres (105,415 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $2,434 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 020-040-007-5 |
| Primary APN | 020-040-007-5 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 10 Rooms |
| Stories | 1 Story |
| Building Area | 2,180 sqft Living Area |
| 1st Floor Area | 2,180 sqft |
| Year Built | Built 1971 |
|---|---|
| Effective Year Built | Effective 1971 |
| Lot Area | 105,415 sqft |
| Garage Area | 420 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 3625 KNIGHTSEN AVE |
|---|---|
| City | KNIGHTSEN |
| State | CA |
| Zip | 94548 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Rural Home |
| Local Zoning Code | A2 |
| Legal Description | PARCEL MAP 3 PG 50 PCL A EX MR 2.42 AC |
| Legal Tract | 3PM50 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | EAST CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2015 |
| Census Tract | 302011 |
3625 Knightsen Ave, a rural home, is owned and occupied by two individuals who acquired it in October 2002.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | PO BOX 186, KNIGHTSEN, CA 94548-0186 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
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 | 2 Names on Deed |
|---|---|
| Last Transfer Date | Oct 17, 2002 |
| Transfer Doc | 0000388553 |
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 3625 Knightsen Ave was $2,434 with a homeowner's exemption.
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Elementary School District | Knightsen Elementary School District (KG - 08) |
| Secondary School District | Liberty Union High School District (09 - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $231,215 (+2%) Land $32,663 Building $198,552 | |
| 2025 | $2,434.00 Homeowner's exemption | $226,682 Land $32,023 Building $194,659 |
| 2023 | $2,353.00 (+1.91%) Homeowner's exemption | $217,882 Land $30,781 Building $187,101 |
| 2022 | $2,309.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 3625 Knightsen Ave in Zone X, an area of minimal flood risk, though there have been 2 flood claims nearby since 2017.
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 | 6 in force |
| Nearby Flood Claims | 2 (2017–2022) |
| Most Recent Claim | Dec 2022 · Severe Winter Storms, Flooding, Landslides, And Mudslides |
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.
Wildfire risk around 3625 Knightsen Ave is moderate, ranking above 60% of the US, with a 0.2% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 60% of the US · lower than 64% of California |
|---|---|
| Wildfire Likelihood | 0.2% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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 | KNIGHTSEN COMMUNITY WATER SYSTEM serves 73 people · EPA ID CA0707547 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Jun 2025 |
| Lead | 1 ppb (2020–2022) 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 28 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 1,200 / 35 |
| Unwired Fixed Wireless | 300 / 25 |
| T-Mobile Fixed Wireless | 100 / 20 |
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