Warren County property record for 503 E Main St, Marthasville, MO 63357
| Property Type | Single Family Home |
|---|---|
| Details | 1 ba · 1,020 sqft · built 1925 |
| Lot Size | 0.155 acres (6,752 sqft) |
| Owner | 2 Individual Names on Record |
| Tax Bill | $558 (2025) |
| Deeds & Mortgages | Jan 2023 Sale |
| Flood Zone | Zone X (minimal risk) |
| APN | 12-29.0-2-20-007.000.000 |
| Primary APN | 12-29.0-2-20-007.000.000 |
|---|
| Full Baths | 1 Bath |
|---|---|
| Stories | 1 Story |
| Building Area | 1,020 sqft Living Area |
| Basement Area | 255 sqft |
| Flooring | Carpet |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1925 |
|---|---|
| Effective Year Built | Effective 1925 |
| Exterior Material | Vinyl |
| Construction Type | Frame |
| Roof Type | Gable |
| Roof Material | Metal |
| Lot Area | 6,752 sqft (0.155 acres) |
| Porch | Slab |
| Porch Area | 54 sqft |
| Utility Building | 448 sqft |
| Cooling System | HVAC |
|---|---|
| Heating System | HVAC |
| Street Address | 503 E MAIN ST |
|---|---|
| City | MARTHASVILLE |
| State | MO |
| Zip | 63357-1317 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | US SURVEY 1688 TWP 45 N R 1 W PT LOT 69 PT LOT 94 |
| Legal Range | 01W |
| Legal Township | 45N |
| Legal Section | 29 |
| Legal Subdivision | US SURVEY 1688 |
| Legal Lot Number | 69,94 |
| Jurisdiction | WARREN MO |
| Township / Civil Division | CHARRETTE |
| Census Block Group | 1 |
| Census Block | 1020 |
| Census Tract | 820204 |
Source: Warren County records, as of February 9, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on Record |
|---|---|
| Mailing Address | 503 E MAIN ST, MARTHASVILLE, MO 63357-1317 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Transfer Date | Jan 25, 2023 |
| Transfer Doc | 0202300454 |
| Record Updated | Jun 8, 2026 |
| Document Type | Deed |
|---|---|
| Jurisdiction | WARREN MO |
| Recording Date | Jan 31, 2023 |
| Property Address | 503 E MAIN ST, MARTHASVILLE, MO 63357-1317 |
| Document Number | 0202300454 |
| Instrument Date | Jan 25, 2023 |
| Instrument | 202300454 |
| Transaction Type | Transfer |
| Record Updated | Dec 15, 2023 |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants with Right of Survivorship |
Source: Warren County assessment roll, as of February 9, 2026
| Type | Name |
|---|---|
| State | Missouri |
| County | Warren County |
| Municipality | Marthasville City |
| Unified School District | Washington School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $558.00 | $8,479 (+12.98%) Land $695 Building $7,784 | $44,630 (+13%) Land $3,660 Building $40,970 |
| 2024 | $558.00 (+8.56%) | $7,505 (-) Land $616 Building $6,889 | |
| 2023 | $514.00 (+7.53%) | $7,505 (+8.02%) Land $616 Building $6,889 | $39,496 (+8%) Land $3,240 Building $36,256 |
| 2022 | $478.00 | $6,948 Land $570 Building $6,378 | |
| 2021 | $36,570 Land $3,000 Building $33,570 |
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 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 | 6 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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 80% of the US · lower than 84% of Missouri |
|---|---|
| Wildfire Likelihood | 0.02% annual chance |
| Exposure | Indirect 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 | MARTHASVILLE PWS serves 1,200 people · EPA ID MO6010505 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Feb 2025 |
| Also Mapped Here | ST CHARLES COUNTY PWSD 2 DUTZOW |
| Lead | Under 1 ppb (2022–2024) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | No certified operator currently in violation since Jun 2026 |
| Monitoring and Reporting | 1 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. The service area is an EPA estimate; the actual supplier may differ.
Source: FCC Broadband Data Collection, based on 109 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Gateway Fiber Fiber | 2,000 / 2,000 |
| Sparklight Cable | 1,000 / 50 |
| Wisper ISP Fixed Wireless | 400 / 30 |
| Verizon Fixed Wireless | 300 / 20 |
May also be available: AT&T, T-Mobile.
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