Yuba County property record for 18139 Old Knox Rd, Challenge, CA 95925
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 1,018 sqft · built 1933 |
| Lot Size | 0.234 acres (10,211 sqft) |
| Owner | Individual Name on File |
| Last Sale | $65,000 (Oct 2006) |
| Tax Bill | $1,844 (2025) |
| Deeds & Mortgages | Jun 2022 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 050-140-005-000 |
| Primary APN | 050-140-005-000 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 4 Rooms |
| Stories | 1 Story |
| Building Area | 1,018 sqft Living Area |
| Gross Area | 1,188 sqft |
| 1st Floor Area | 1,018 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1933 |
|---|---|
| Effective Year Built | Effective 1945 |
| Lot Area | 10,211 sqft (0.234 acres) |
| Porch | Enclosed Porch |
| Patio Area | 44 sqft |
| Cooling System | Central |
|---|
| Old Parcel Number | 050-140-005 |
|---|---|
| Street Address | 18139 OLD KNOX RD |
| City | CHALLENGE |
| State | CA |
| Zip | 95925-9613 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | A/RR |
| Legal Description | PTN SE1/4 SEC 19 TWP 19 RGE 7 |
| Jurisdiction | YUBA CA |
| Township / Civil Division | YUBA FOOTHILLS |
| Census Block Group | 1 |
| Census Block | 1101 |
| Census Tract | 41101 |
18139 Old Knox Rd is owned and occupied by an individual who acquired it in May 2022.
Source: Yuba 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 | Individual Name on File |
|---|---|
| Mailing Address | PO BOX 153, CHALLENGE, CA 95925-0153 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Oct 18, 2006 · Amount on File |
| Deed Sale | Oct 18, 2006 · Amount on File |
| Deed Document Number | 200621152 |
| Last Transfer Date | May 27, 2022 |
| Transfer Doc | 0000009344 |
| Record Updated | Sep 20, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | YUBA CA |
| Recording Date | Jun 9, 2022 |
| Property Address | 18139 OLD KNOX RD, CHALLENGE, CA 95925-9613 |
| Document Number | 0000009344 |
| Instrument Date | May 27, 2022 |
| Instrument | 2022-009344 |
| Transaction Type | Transfer |
| Record Updated | Jun 27, 2022 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 18139 OLD KNOX RD, CHALLENGE, CA 95925-9613 |
The 2025 property tax bill for 18139 Old Knox Rd was $1,844 with a homeowner's exemption.
Source: Yuba County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Yuba County |
| Unified School District | Marysville Joint Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $170,797 (+2%) Land $61,485 Building $109,312 | ||
| 2025 | $1,844.00 Homeowner's exemption | $167,449 Land $60,280 Building $107,169 | |
| 2023 | $1,782.00 (+1.25%) Homeowner's exemption | $160,949 Land $57,941 Building $103,008 | $232,740 |
| 2022 | $1,760.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 18139 Old Knox Rd in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective June 5, 2024
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Wildfire risk around 18139 Old Knox Rd is extreme, ranking above 98.8% of the US, with a 3% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Extreme above 98.8% of the US · above 91% of California |
|---|---|
| Wildfire Likelihood | 3% annual chance |
| Exposure | Direct burnable vegetation |
Insurers in high-risk areas may require mitigation or decline coverage; check availability before making an offer.
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 | NORTH YUBA WATER DISTRICT serves 2,772 people · EPA ID CA5810006 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Oct 2023 |
| Lead | 2 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.
Source: FCC Broadband Data Collection, based on 34 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Starlink Satellite | 280 / 30 |
| DigitalPath Fixed Wireless | 200 / 20 |
No cell data coverage reported
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