Sonoma County property record for 540 Walten Way, Windsor, CA 95492
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2.5 ba · 1,767 sqft · built 1991 |
| Lot Size | 0.138 acres (5,988 sqft) |
| Owner | Individual Name on File |
| Last Sale | $769,000 (Oct 2024) |
| Tax Bill | $9,192 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 161-300-021-000 |
| Primary APN | 161-300-021-000 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 3 Rooms |
| Stories | 2 Stories |
| Building Area | 1,767 sqft Living Area |
| 1st Floor Area | 927 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1991 |
|---|---|
| Effective Year Built | Effective 1991 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 5,988 sqft (0.138 acres) |
| Garage Area | 473 sqft |
| Cooling System | HVAC |
|---|---|
| Heating System | Central |
| Old Parcel Number | 161-300-021 |
|---|---|
| Street Address | 540 WALTEN WAY |
| City | WINDSOR |
| State | CA |
| Zip | 95492-8038 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | CITYWI |
| Legal Description | 91 FM 065-910-21 #CHG PER MD CASTLE ESTS LOT 21 |
| Legal Subdivision | CHG PER MD CASTLE EST |
| Legal Block | 3 |
| Legal Lot Number | 21 |
| Jurisdiction | SONOMA CA |
| Township / Civil Division | HEALDSBURG |
| Census Block Group | 3 |
| Census Block | 3011 |
| Census Tract | 153808 |
540 Walten Way is owned and occupied by an individual who bought it in October 2024.
Source: Sonoma County records, as of September 1, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 540 WALTEN WAY, WINDSOR, CA 95492-8038 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Unmarried Woman |
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 | Oct 2, 2024 · Amount on File |
| Deed Sale | Oct 2, 2024 · Amount on File |
| Prior Sale | Jan 2, 2002 · Amount on File |
| Deed Document Number | 202445629 |
| Prior Transfer Date | Mar 14, 2003 |
| Prior Transfer Doc | 0000054586 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 540 Walten Way was $9,192.
Source: Sonoma County assessment roll, as of September 1, 2026
| Type | Name |
|---|---|
| State | California |
| County | Sonoma County |
| Municipality | Windsor Town |
| Unified School District | Windsor Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $784,380 (+2%) Land $315,180 Building $469,200 | |
| 2025 | $9,192.00 | $769,000 Land $309,000 Building $460,000 |
| 2023 | $5,444.00 (+1.76%) Homeowner's exemption | $447,274 Land $141,988 Building $305,286 |
| 2022 | $5,350.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 540 Walten Way in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.
Source: FEMA National Flood Hazard Layer, effective February 15, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on File median of 12 policies |
| Nearby Flood Policies | 12 in force |
| Nearby Flood Claims | 1 (2017) |
| Most Recent Claim | Jan 2017 · Severe Winter Storms, Flooding, 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.
The area around 540 Walten Way has no burnable land within ember reach, so its wildfire risk is not rated.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land within ember reach |
|---|
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 | TOWN OF WINDSOR serves 25,561 people · EPA ID CA4910017 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Aug 2022 |
| Lead | Under 1 ppb (2023–2025) 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 466 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL · Fiber in parts of the area | 100 / 20 |
May also be available: GeoLinks, Verizon.
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