Ventura County property record for 510 Winncastle St, Simi Valley, CA 93065
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 4.5 ba · 3,275 sqft · built 1997 |
| Lot Size | 0.251 acres (10,944 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $392,500 (Jan 1997) |
| Tax Bill | $7,933 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 596-0-121-525 |
| Primary APN | 596-0-121-525 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 4.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 9 Rooms |
| Stories | 2 Stories |
| Building Area | 3,275 sqft Living Area |
| 1st Floor Area | 1,709 sqft |
| 2nd Floor Area | 1,566 sqft |
| Upper Floors Area | 54 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1997 |
|---|---|
| Effective Year Built | Effective 1997 |
| Lot Area | 10,944 sqft (0.251 acres) |
| Garage Area | 662 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Slab |
|---|---|
| Porch Area | 71 sqft |
| Deck Area | 165 sqft |
| Patio Area | 330 sqft |
| Old Parcel Number | 6800470525 |
|---|---|
| Street Address | 510 WINNCASTLE ST |
| City | SIMI VALLEY |
| State | CA |
| Zip | 93065-0619 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | RPD1 |
| Legal Description | TRACT: 423900 LOT: 202 REF: 117MR 3 |
| Legal Subdivision | 4239 |
| Legal Tract | 423900 |
| Legal Block | 121 |
| Legal Lot Number | 202 |
| Jurisdiction | VENTURA CA |
| Township / Civil Division | SIMI VALLEY |
| Census Block Group | 1 |
| Census Block | 1002 |
| Census Tract | 7506 |
510 Winncastle St is owned and occupied by two individuals who bought it in January 1997.
Source: Ventura County records, as of October 15, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 510 WINNCASTLE ST, SIMI VALLEY, CA 93065-0619 |
| Occupancy | Owner Occupied |
| 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 | 2 Names on Deed |
|---|---|
| Last Sale | Jan 27, 1997 · Amount on File |
| Deed Sale | Jan 27, 1997 · Amount on File |
| Deed Document Number | 199710348 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 510 Winncastle St was $7,933 with a homeowner's exemption, up 1.2% from the year before.
Source: Ventura County assessment roll, as of July 15, 2026
| Type | Name |
|---|---|
| State | California |
| County | Ventura County |
| Municipality | Simi Valley City |
| Unified School District | Simi Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $672,960 (+2%) Land $264,122 Building $408,838 | |
| 2025 | $7,933.00 (+1.16%) Homeowner's exemption | $659,765 Land $258,943 Building $400,822 |
| 2024 | $7,842.00 (+6.33%) | |
| 2023 | $7,375.00 (+0.22%) Homeowner's exemption | $634,147 Land $248,889 Building $385,258 |
| 2022 | $7,359.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 510 Winncastle St in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective September 30, 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 | 1 in force |
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 510 Winncastle St is moderate, ranking above 51% of the US, with a 0.08% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 51% of the US · lower than 70% of California |
|---|---|
| Wildfire Likelihood | 0.08% 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 | VENTURA WWD NO. 8 - SIMI VALLEY serves 94,736 people · EPA ID CA5610023 |
|---|---|
| Water Source | Purchased surface water from CALLEGUAS MUNICIPAL WATER DIST |
| Last State Inspection | Jan 2023 |
| 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 208 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Spectrum Cable | 1,000 / 35 |
| Rocket Broadband Fixed Wireless | 450 / 100 |
May also be available: AT&T, Verizon.
5G (outdoors only) and 4G LTE
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