St. Louis County property record for 40 Mason Ave, Saint Louis, MO 63119
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2.5 ba · 3,728 sqft · built 1910 |
| Lot Size | 0.514 acres (22,399 sqft) |
| Owner | 2 Trust Names on Record |
| Tax Bill | $12,290 (2024) |
| Flood Zone | Zone X (minimal risk) |
| APN | 23K-53-0623 |
| Primary APN | 23K-53-0623 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Plumbing Fixtures | 10 Plumbing Fixtures |
| Total Rooms | 10 Rooms |
| Stories | 2 Stories |
| Building Area | 3,728 sqft Living Area |
| 1st Floor Area | 1,545 sqft |
| Family Room | Family Room |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1910 |
|---|---|
| Effective Year Built | Effective 1910 |
| Architectural Style | Conventional |
| Exterior Material | Aluminum/Vinyl |
| Foundation Type | No Foundation |
| Lot Area | 22,399 sqft (0.514 acres) |
| Lot Dimensions | 224 ft deep x 100 ft wide |
| View / Lot | Cul-De-Sac |
| Garage Type | Open |
| Garage Area | 144 sqft |
| Parking Spaces | 2 Parking Spaces |
| Pool Area | 760 sqft |
|---|---|
| Porch | Open Porch |
| Porch Area | 945 sqft |
| Balcony Area | 76 sqft |
| Shed | 1 Shed |
| Shed Area | 208 sqft |
| Cooling System | Central |
|---|---|
| Heating Fuel | Electric |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 40 MASON AVE |
|---|---|
| City | SAINT LOUIS |
| State | MO |
| Zip | 63119-2506 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | 64A1 |
| Legal Description | E JOY SUBD LOT 25 |
| Legal Subdivision | E JOY SUBD |
| Legal Lot Number | 25 |
| Jurisdiction | ST LOUIS MO |
| Township / Civil Division | JEFFERSON |
| Census Block Group | 2 |
| Census Block | 2006 |
| Census Tract | 219200 |
Source: St. Louis County records, as of September 29, 2025
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Trust Names on Record |
|---|---|
| Mailing Address | 40 MASON AVE, SAINT LOUIS, MO 63119-2506 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Trust, Revocable Trust |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jul 28, 2009 |
| Deed Sale | Jul 28, 2009 |
| Deed Document Number | 2009553 |
| Deed Book / Page | 18506 / 1358 |
| Last Transfer Date | Apr 28, 2016 |
| Transfer Doc | 0219970550 |
| Record Updated | Jun 8, 2026 |
Source: St. Louis County assessment roll, as of September 29, 2025
| Type | Name |
|---|---|
| State | Missouri |
| County | St. Louis County |
| Municipality | Webster Groves City |
| Unified School District | Webster Groves School District (KG - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $213,920 (+20.47%) Land $105,300 Building $108,620 | $1,125,900 (+20.47%) Land $554,200 Building $571,700 | |
| 2024 | $12,290.00 (+0.49%) | ||
| 2023 | $12,230.00 (-2.07%) | $177,570 (+5%) Land $81,050 Building $96,520 | $934,600 (+5%) Land $426,600 Building $508,000 |
| 2022 | $12,489.00 | $169,120 Land $81,050 Building $88,070 | |
| 2021 | $890,100 Land $426,600 Building $463,500 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
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 Claims | 1 (1981) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Oct 1981 · 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.
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 | 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 367 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · Fixed Wireless, DSL in parts of the area | 5,000 / 5,000 |
| Spectrum Cable · Fiber in parts of the area | 1,000 / 1,000 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: ClearWave, Wisper ISP.
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