Ventura County property record for 503 Winncastle St, Simi Valley, CA 93065
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 4.5 ba · 3,275 sqft · built 1997 |
| Lot Size | 0.204 acres (8,884 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $775,000 (May 2013) |
| Tax Bill | $11,160 (2025) |
| Deeds & Mortgages | Oct 2022 Mortgage Sep 2018 Line of Credit |
| Flood Zone | Zone X (minimal risk) |
| APN | 596-0-121-275 |
| Primary APN | 596-0-121-275 |
|---|---|
| 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 |
| Exterior Material | Stucco |
| Roof Material | Tile |
| Lot Area | 8,884 sqft (0.204 acres) |
| Garage Area | 662 sqft |
| Parking Spaces | 2 Parking Spaces |
| Pool Area | 570 sqft |
|---|---|
| Porch | Slab |
| Porch Area | 71 sqft |
| Deck Area | 165 sqft |
| Patio Area | 330 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Sewer | Municipal |
| Water Source | Commercial |
| Old Parcel Number | 6800470275 |
|---|---|
| Street Address | 503 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: 227 REF: 117MR 3 |
| Legal Subdivision | STONE CANYON |
| Legal Tract | 423900 |
| Legal Block | 121 |
| Legal Lot Number | 227 |
| Jurisdiction | VENTURA CA |
| Township / Civil Division | SIMI VALLEY |
| Census Block Group | 1 |
| Census Block | 1000 |
| Census Tract | 7507 |
503 Winncastle St is owned and occupied by two individuals who bought it in May 2013.
Source: Ventura County records, as of October 15, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 503 WINNCASTLE ST, SIMI VALLEY, CA 93065-0619 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Date | Document |
|---|---|
| Oct 25, 2022 | Deed of Trust, Mortgage · Commercial Mortgage CITY NATIONAL BANK |
| Sep 18, 2018 | Deed of Trust, Mortgage · Line of Credit VENTURA COUNTY CU |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | May 20, 2013 · Amount on File |
| Deed Sale | May 20, 2013 · Amount on File |
| Prior Sale | Jun 1, 2012 · Amount on File |
| Deed Document Number | 201390401 |
| Prior Transfer Date | Nov 27, 2001 |
| Prior Transfer Doc | 0000246670 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | VENTURA CA |
| Property Address | 503 WINNCASTLE ST, SIMI VALLEY, CA 93065-0619 |
| Transaction Type | Mortgage |
| Record Updated | Nov 9, 2022 |
| Title Company | OLD REPUBLIC TITLE COMPANY |
| Name | Verified Name |
|---|---|
| Address | 503 WINNCASTLE ST, SIMI VALLEY, CA 93065-0619 |
| Document Number | 2022000103777 |
|---|---|
| Date | Oct 25, 2022 |
| Instrument | 2022000103777 |
| Name | CITY NATIONAL BANK |
|---|---|
| Type | Bank |
| Address | LOS ANGELES, CA 90071 |
| Type | Commercial Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Oct 18, 2052 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | VENTURA CA |
| Property Address | 503 WINNCASTLE ST, SIMI VALLEY, CA 93065-0619 |
| Transaction Type | Mortgage |
| Record Updated | Oct 21, 2022 |
| Title Company | STEWART TITLE |
| Name | Verified Name |
|---|
| Document Number | 0000106509 |
|---|---|
| Date | Sep 18, 2018 |
| Instrument | 20180918-00106509 |
| Name | VENTURA COUNTY CU |
|---|---|
| Type | Credit Union |
| Address | VENTURA, CA 93001 |
| Type | Line of Credit |
|---|---|
| Amount | Amount on Record |
| Term | 300 Months |
| Due | Sep 27, 2043 |
| Rate Type | Adjustable Rate |
|---|---|
| Change Frequency | Monthly |
The 2025 property tax bill for 503 Winncastle St was $11,160 with a homeowner's exemption, up 1.1% 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 | $973,430 (+2%) Land $389,372 Building $584,058 | |
| 2025 | $11,160.00 (+1.13%) Homeowner's exemption | $954,344 Land $381,738 Building $572,606 |
| 2024 | $11,035.00 (+6.3%) | |
| 2023 | $10,381.00 (+0.02%) Homeowner's exemption | $917,287 Land $366,915 Building $550,372 |
| 2022 | $10,379.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 503 Winncastle St in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 1998.
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 | 4 in force |
| Nearby Flood Claims | 1 (1998) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Feb 1998 · Severe Winter Storms And Flooding |
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 503 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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