Warren County property record for 20243 Alta, Marthasville, MO 63357
| Property Type | Single Family Home |
|---|---|
| Details | 1 ba · 864 sqft · built 1967 |
| Lot Size | 2.86 acres (125,017 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $713 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 10-32.0-0-00-001.000.000 |
| Primary APN | 10-32.0-0-00-001.000.000 |
|---|
| Full Baths | 1 Bath |
|---|---|
| Stories | 1 Story |
| Building Area | 864 sqft Living Area |
| Flooring | Carpet |
| Interior Walls | Paneling |
| Year Built | Built 1967 |
|---|---|
| Architectural Style | A-Frame |
| Exterior Material | Other |
| Foundation Type | Pier/Post & Beam |
| Roof Type | Gable |
| Roof Material | Asphalt |
| Lot Area | 125,017 sqft (2.86 acres) |
| Deck Area | 72 sqft |
| Patio Area | 80 sqft |
| Cooling System | HVAC |
|---|---|
| Heating System | HVAC |
| Street Address | 20243 ALTA |
|---|---|
| City | MARTHASVILLE |
| State | MO |
| Zip | 63357 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 83 ASPENHOF PLAT 6 SEC 32 TWP 46 RNG 2 |
| Legal Subdivision | ASPENHOF |
| Legal Lot Number | 83 |
| Jurisdiction | WARREN MO |
| Township / Civil Division | CHARRETTE |
| Census Block Group | 2 |
| Census Block | 2029 |
| Census Tract | 820203 |
20243 Alta is owned by two individuals who acquired it in March 2016.
Source: Warren County records, as of February 6, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Co-owner | 2 Co-owners on File |
| Mailing Address | 1819 MARIE PEINE CT, WENTZVILLE, MO 63385-2676 |
| 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 | 4 Names on Deed |
|---|---|
| Last Sale | Mar 18, 2016 |
| Deed Sale | Mar 18, 2016 |
| Deed Document Number | 201601327 |
| Record Updated | Jun 8, 2026 |
The 2025 property tax bill for 20243 Alta was $713.
Source: Warren County assessment roll, as of May 31, 2025
| Type | Name |
|---|---|
| State | Missouri |
| County | Warren County |
| Unified School District | Warren County R-III School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $713.00 | $12,833 (+13.02%) Land $3,407 Building $9,426 | $67,540 Land $17,930 Building $49,610 |
| 2024 | $713.00 (+5.94%) | $11,355 (-) Land $3,014 Building $8,341 | |
| 2023 | $673.00 (+7.51%) | $11,355 (+7.99%) Land $3,014 Building $8,341 | $59,767 Land $15,865 Building $43,902 |
| 2022 | $626.00 | $10,515 Land $2,791 Building $7,724 | |
| 2021 | $55,340 Land $14,690 Building $40,650 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 20243 Alta in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective November 4, 2009 · 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 | 5 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 20243 Alta is moderate, ranking above 40% of the US, with a 0.06% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 40% of the US · lower than 60% of Missouri |
|---|---|
| Wildfire Likelihood | 0.06% 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 | ST CHARLES COUNTY PWSD 2 WARREN serves 1,192 people · EPA ID MO6024629 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Aug 2023 |
| Lead | 1 ppb (2021–2023) 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 20 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Starlink Satellite | 280 / 30 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless | 25 / 3 |
| BlueBit Networks Fixed Wireless | 10 / 1 |
| Brightspeed DSL | 10 / 1 |
5G and 4G LTE (outdoors only)
Search by:
By searching, you agree to: Terms • Privacy • Disclosures