Contra Costa County property record for 3671 Knightsen Ave, Knightsen, CA 94548
| Property Type | Rural Home |
|---|---|
| Details | 4 bd · 3 ba · 2,491 sqft · built 1966 |
| Lot Size | 1.07 acres (47,044 sqft) |
| Owner | 2 Company Names on Record |
| Last Sale | $47,000 (Aug 1995) |
| Tax Bill | $4,964 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 020-040-019 |
| Primary APN | 020-040-019 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 10 Rooms |
| Stories | 1 Story |
| Building Area | 2,491 sqft Living Area |
| 1st Floor Area | 2,491 sqft |
| Year Built | Built 1966 |
|---|---|
| Effective Year Built | Effective 1966 |
| Lot Area | 47,044 sqft |
| Garage Area | 537 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 3671 KNIGHTSEN AVE |
|---|---|
| City | KNIGHTSEN |
| State | CA |
| Zip | 94548 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Rural Home |
| Local Zoning Code | A3 |
| Legal Description | PCL MAP 46 PG 14 PCL A EX MR |
| Legal Tract | 46PM14 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | EAST CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2015 |
| Census Tract | 302011 |
Source: Contra Costa County records, as of July 14, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | 2 Company Names on Record |
|---|---|
| Mailing Address | PO BOX 518, KNIGHTSEN, CA 94548-0518 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Aug 24, 1995 · Amount on Record |
| Deed Sale | Aug 24, 1995 · Amount on Record |
| Deed Document Number | 1995140134 |
| Last Transfer Date | Apr 14, 2004 |
| Transfer Doc | 0000148594 |
| Record Updated | Sep 20, 2026 |
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 | $475,493 (+2%) Land $156,296 Building $319,197 | |
| 2025 | $4,964.00 (+3.48%) Homeowner's exemption | $466,171 (+4.04%) Land $153,232 Building $312,939 |
| 2023 | $4,797.00 (+1.89%) Homeowner's exemption | $448,071 Land $147,283 Building $300,788 |
| 2022 | $4,708.00 |
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 | 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.
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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