St. Louis County property record for 509 Windsor Mill Dr, Ballwin, MO 63011
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2 ba · 1,672 sqft · built 1976 |
| Lot Size | 0.234 acres (10,180 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $255,000 (May 2017) |
| Tax Bill | $4,343 (2025) |
| Deeds & Mortgages | May 2017 Sale & Mortgage May 2017 Sale |
| Flood Zone | Zone X (minimal risk) |
| APN | 22R-41-0192 |
| Primary APN | 22R-41-0192 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Plumbing Fixtures | 8 Plumbing Fixtures |
| Total Rooms | 8 Rooms |
| Stories | 1 Story |
| Building Area | 1,672 sqft Living Area |
| Gross Area | 2,178 sqft |
| 1st Floor Area | 1,672 sqft |
| Family Room | Family Room |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1976 |
|---|---|
| Effective Year Built | Effective 1976 |
| Architectural Style | Ranch |
| Exterior Material | Brick/Stone |
| Construction Type | Frame |
| Foundation Type | Raised |
| Lot Area | 10,180 sqft (0.234 acres) |
| Lot Dimensions | 90 ft deep x 79 ft wide |
| Garage Type | Attached |
| Garage Area | 506 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Open Frame Porch |
| Porch Area | 32 sqft |
| Patio Area | 270 sqft |
| Cooling System | Central |
|---|---|
| Heating System | HVAC |
| Heating Fuel | Electric |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 509 WINDSOR MILL DR |
|---|---|
| City | BALLWIN |
| State | MO |
| Zip | 63011-3331 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | 93R-2 |
| Legal Description | BRUSHCREEK PLAT 1 7 21 76 LOT 118 |
| Legal Subdivision | BRUSHCREEK PLAT 1 |
| Legal Lot Number | 118 |
| Jurisdiction | ST LOUIS MO |
| Township / Civil Division | LAFAYETTE |
| Census Block Group | 2 |
| Census Block | 2005 |
| Census Tract | 217807 |
509 Windsor Mill Dr is owned and occupied by two individuals who bought it in May 2017.
Source: St. Louis County records, as of September 29, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 509 WINDSOR MILL DR, BALLWIN, MO 63011-3331 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Tenants by the Entirety |
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 |
|---|---|
| May 1, 2017 | Warranty Deed, Transfer PARAMOUNT BOND & MTG |
| May 1, 2017 | Warranty Deed, Transfer US TITLE |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | May 1, 2017 · Amount on File |
| Deed Sale | May 1, 2017 · Amount on File |
| Prior Sale | May 1, 2017 · Amount on File |
| Deed Document Number | 2017299 |
| Deed Book / Page | 22504 / 1505 |
| Prior Transfer Date | Feb 20, 1998 |
| Prior Transfer Doc | 0000000607 |
| Record Updated | Oct 29, 2026 |
| Document Type | Warranty Deed |
|---|---|
| Jurisdiction | ST LOUIS MO |
| Recording Date | May 1, 2017 |
| Property Address | 509 WINDSOR MILL DR, BALLWIN, MO 63011-3331 |
| Document Number | 0225041505 |
| Book / Page | 022504 / 001505 |
| Instrument Date | Apr 26, 2017 |
| Instrument | 299 |
| Transaction Type | Transfer |
| Record Updated | Jun 30, 2017 |
| Title Company | US TITLE |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Tenants by the Entirety |
| Address | 509 WINDSOR MILL DR BALLWIN MO 630113331, BALLWIN, MO 63011-3331 |
| Document Number | 225041508 |
|---|---|
| Date | May 1, 2017 |
| Book Page | 022504/001508 |
| Instrument | 300 |
| Name | PARAMOUNT BOND & MTG |
|---|---|
| Type | Mortgage Company |
| Address | SAINT LOUIS, MO 63141 |
| Amount | Amount on Record |
|---|---|
| Term | 360 Months |
| Due | Apr 30, 2047 |
| Document Type | Warranty Deed |
|---|---|
| Jurisdiction | ST LOUIS MO |
| Recording Date | May 1, 2017 |
| Property Address | 509 WINDSOR MILL DR, BALLWIN, MO 63011-3331 |
| Document Number | 0225041502 |
| Book / Page | 022504 / 001502 |
| Instrument Date | Apr 11, 2017 |
| Instrument | 298 |
| Transaction Type | Transfer |
| Record Updated | May 5, 2017 |
| Title Company | US TITLE |
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Husband and Wife |
| Address | 509 WINDSOR MILL DR BALLWIN MO 630113331, BALLWIN, MO 63011-3331 |
The 2025 property tax bill for 509 Windsor Mill Dr was $4,343, up 6.9% from the year before.
Source: St. Louis County assessment roll, as of September 29, 2026
| Type | Name |
|---|---|
| State | Missouri |
| Municipality | Ballwin City |
| County | St. Louis County |
| Unified School District | Rockwood R-VI School District (KG - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $63,310 (-) Land $26,680 Building $36,630 | $333,200 (-) Land $140,400 Building $192,800 | |
| 2025 | $4,343.00 (+6.94%) | $63,310 Land $26,680 Building $36,630 | $333,200 Land $140,400 Building $192,800 |
| 2024 | $4,061.00 (+0.07%) | ||
| 2023 | $4,058.00 (+6.06%) | $58,010 (+13.41%) Land $15,010 Building $43,000 | $305,300 Land $79,000 Building $226,300 |
| 2022 | $3,826.00 | $51,150 Land $16,660 Building $34,490 | |
| 2021 | $269,200 Land $87,700 Building $181,500 |
Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.
FEMA maps place 509 Windsor Mill Dr in Zone X, an area of minimal flood risk, though there have been 5 flood claims nearby since 1982.
Source: FEMA National Flood Hazard Layer, effective August 10, 2025 · 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 |
| Nearby Flood Policies | 3 in force |
| Nearby Flood Claims | 5 (1982–2026) |
| Claims Outside the SFHA | 5 of 5 |
| Most Recent Claim | Jul 2026 · rainfall accumulation |
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 509 Windsor Mill Dr is low, with less than a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 97% of the US · lower than 95% of Missouri |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | None beyond 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 | MO AMERICAN ST LOUIS ST CHARLES COUNTIES private · serves 1,111,000 people · EPA ID MO6010716 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Feb 2024 |
| 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 270 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| i3 Broadband Fiber | 8,000 / 8,000 |
| Spectrum Cable | 1,000 / 1,000 |
| AT&T Fixed Wireless · DSL · Fiber in parts of the area | 100 / 20 |
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