Contra Costa County property record for 4170 Knightsen Ave, Oakley, CA 94561
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 1,102 sqft · built 1950 |
| Lot Size | 0.19 acres (8,276 sqft) |
| Owner | Individual Name on File |
| Last Sale | $93,000 (Apr 2011) |
| Tax Bill | $5,288 (2025) |
| Deeds & Mortgages | Jun 2023 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 032-030-004-9 |
| Primary APN | 032-030-004-9 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 5 Rooms |
| Stories | 1 Story |
| Building Area | 1,102 sqft Living Area |
| 1st Floor Area | 1,102 sqft |
| Year Built | Built 1950 |
|---|---|
| Effective Year Built | Effective 1950 |
| Lot Area | 8,276 sqft (0.19 acres) |
| Garage Type | Attached |
| Garage Area | 523 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 4170 KNIGHTSEN AVE |
|---|---|
| City | OAKLEY |
| State | CA |
| Zip | 94561-3611 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | A2 |
| Legal Description | POR SEC 29 T2N R3E EX MR |
| Legal Range | 03E |
| Legal Township | 02N |
| Legal Section | 29 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | EAST CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2007 |
| Census Tract | 302011 |
4170 Knightsen Ave is owned by an individual who acquired it in March 2023.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 62 E 11TH ST, TRACY, CA 95376-4012 |
| Owner Type | Individual |
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 Sale | Apr 4, 2011 · Amount on File |
| Deed Sale | Apr 4, 2011 · Amount on File |
| Prior Sale | Feb 16, 2007 · Amount on File |
| Deed Document Number | 201168194 |
| Last Transfer Date | Mar 27, 2023 |
| Transfer Doc | 0000056336 |
| Record Updated | Oct 29, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Jun 13, 2023 |
| Property Address | 4170 KNIGHTSEN AVE, OAKLEY, CA 94561-3611 |
| Document Number | 0000056336 |
| Instrument Date | Mar 27, 2023 |
| Instrument | 2023-056336 |
| Transaction Type | Transfer |
| Record Updated | Jun 21, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 4170 KNIGHTSEN AVE, OAKLEY, CA 94561-3611 |
The 2025 property tax bill for 4170 Knightsen Ave was $5,288.
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Secondary School District | Liberty Union High School District (09 - 12) |
| Elementary School District | Oakley Union Elementary School District (KG - 08) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $488,155 (+2%) Land $212,241 Building $275,914 | |
| 2025 | $5,288.00 | $478,584 Land $208,080 Building $270,504 |
| 2023 | $1,314.00 (+0.92%) | $112,267 Land $36,214 Building $76,053 |
| 2022 | $1,302.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 4170 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 4170 Knightsen Ave is moderate, ranking above 61% 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 61% of the US · lower than 62% 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: FCC Broadband Data Collection, based on 142 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 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: AT&T.
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