Contra Costa County property record for 3900 Knightsen Ave, Oakley, CA 94561
| Property Type | Orchard (Fruit, Nut) |
|---|---|
| Details | 1,163 sqft · built 1944 |
| Lot Size | 13.5 acres (590,673 sqft) |
| Owner | Trust Name on File |
| Tax Bill | $1,913 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 020-020-017-8 |
| Primary APN | 020-020-017-8 |
|---|---|
| Alternative APN |
|
| Stories | 1 Story |
|---|---|
| Building Area | 1,163 sqft Gross Area |
| 1st Floor Area | 1,163 sqft |
| Year Built | Built 1944 |
|---|---|
| Effective Year Built | Effective 1944 |
| Lot Area | 590,673 sqft |
| Street Address | 3900 KNIGHTSEN AVE |
|---|---|
| City | OAKLEY |
| State | CA |
| Zip | 94561-3617 |
| Property Category | Agriculture or Farming |
| Property Type | Agriculture / Farming > Orchard (Fruit, Nut) |
| Local Zoning Code | A2 |
| Legal Description | POR SEC 32 T2N R3E EX MR |
| Legal Range | 03E |
| Legal Township | 02N |
| Legal Section | 32 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | EAST CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2005 |
| Census Tract | 302011 |
3900 Knightsen Ave, an agricultural property, is held in a trust since December 2011.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | PO BOX 673, KNIGHTSEN, CA 94548-0673 |
| Owner Type | Company |
| Vesting | Trust |
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 | Name on Deed |
|---|---|
| Last Transfer Date | Dec 20, 2011 |
| Transfer Doc | 0000281603 |
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 3900 Knightsen Ave was $1,913.
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 | $173,746 (+2%) Land $114,207 Building $59,539 | |
| 2025 | $1,913.00 | $170,340 Land $111,968 Building $58,372 |
| 2023 | $1,853.00 (+1.81%) | $163,727 Land $107,621 Building $56,106 |
| 2022 | $1,820.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 3900 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 3900 Knightsen Ave is moderate, ranking above 68% of the US, with a 0.3% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 68% of the US · above 43% of California |
|---|---|
| Wildfire Likelihood | 0.3% 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: FCC Broadband Data Collection, based on 8 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| Starlink Satellite | 280 / 30 |
May also be available: AT&T, Xfinity.
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