20503 Koelling Rd, Marthasville, MO 63357 Property Records

Warren County property record for 20503 Koelling Rd, Marthasville, MO 63357

Property Summary

Property Type	Rural Home
Details	2 ba · 1,271 sqft · built 1993
Lot Size	11.7 acres (513,572 sqft)
Owner	2 Individual Names on File
Last Sale	$186,300 (Apr 2021)
Tax Bill	$1,960 (2025)
Deeds & Mortgages	Apr 2021 Mortgage Apr 2021 Transfer
Flood Zone	Zone X (minimal risk)
APN	`13-08.0-0-00-015.001.000`

Property Details

APN / Parcel Number

Primary APN	`13-08.0-0-00-015.001.000`

Interior

Full Baths	2 Baths
Stories	1 Story
Building Area	1,271 sqft Living Area
Basement Area	1,246 sqft
Flooring	Carpet
Interior Walls	Wallboard/Drywall
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1993
Effective Year Built	Effective 1993
Exterior Material	Vinyl
Construction Type	Frame
Roof Type	Gable
Roof Material	Asphalt
Lot Area	513,572 sqft (11.7 acres)
Garage Type	Attached
Garage Area	484 sqft
Parking Spaces	2 Parking Spaces

Exterior Amenities

Porch	Slab
Porch Area	108 sqft
Deck Area	Deck Area
Patio Area	182 sqft
Utility Building	320 sqft

Utilities, Heating & Cooling

Cooling System	HVAC
Heating System	HVAC

Location & Zoning

Street Address	20503 KOELLING RD
City	MARTHASVILLE
State	MO
Zip	63357-2973
Property Category	Residential
Property Type	Residential > Single Family > Rural Home
Legal Description	PT SE1/4 SW1/4 SEC 8 T45N R2W
Legal Range	02W
Legal Township	45N
Legal Section	08
Jurisdiction	WARREN MO
Township / Civil Division	CHARRETTE
Census Block Group	2
Census Block	2037
Census Tract	820203

Owner

20503 Koelling Rd, a rural home, is owned and occupied by two individuals who bought it in April 2021.

Source: Warren County records, as of February 9, 2026

Owner of Record	2 Individual Names on File
Mailing Address	20503 KOELLING RD, MARTHASVILLE, MO 63357-2973
Occupancy	Owner Occupied
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.

Deeds, Mortgages & Sale History

Date	Document
Apr 21, 2021	Deed of Trust, Mortgage · Stand-Alone First Mortgage DAS ACQUISITION
Apr 21, 2021	Quit Claim Deed, Transfer Quitclaim

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Apr 21, 2021 · Amount on File
Deed Sale	Apr 21, 2021 · Amount on File
Prior Sale	Aug 11, 2009 · Amount on File
Deed Document Number	20213299
Prior Transfer Date	Apr 15, 2021
Prior Transfer Doc	0202103299
Record Updated	Oct 29, 2026

April 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	WARREN MO
Property Address	20503 KOELLING RD, MARTHASVILLE, MO 63357-2973
Transaction Type	Mortgage
Record Updated	Dec 15, 2023

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0202103300
Date	Apr 21, 2021
Instrument	202103300

Lender

Name	DAS ACQUISITION

Agreement

Type	Stand-Alone First Mortgage
Amount	Amount on Record
Term	181 Months
Due	May 1, 2036

April 2021: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	WARREN MO
Recording Date	Apr 21, 2021
Property Address	20503 KOELLING RD, MARTHASVILLE, MO 63357-2973
Document Number	0202103299
Instrument Date	Apr 15, 2021
Instrument	202103299
Transaction Type	Transfer
Record Updated	Jun 13, 2023

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	20503 KOELLING RD, MARTHASVILLE, MO 63357-2973

Tax Assessment & Valuation

The 2025 property tax bill for 20503 Koelling Rd was $1,960.

Source: Warren County assessment roll, as of February 9, 2026

Property Jurisdictions

Type	Name
State	Missouri
County	Warren County
Unified School District	Warren County R-III School District (PK - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2025	$1,960.00	$35,267 (+12.92%) Land $4,544 Building $30,723	$186,250 Land $24,280 Building $161,970
2024	$1,960.00 (+5.77%)	$31,232 (-) Land $4,034 Building $27,198
2023	$1,853.00 (+7.48%)	$31,232 (+7.94%) Land $4,034 Building $27,198	$165,015 Land $21,596 Building $143,419
2022	$1,724.00	$28,934 Land $3,744 Building $25,190
2021			$152,920 Land $20,070 Building $132,850

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.

Flood

FEMA maps place 20503 Koelling Rd 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

Wildfire risk around 20503 Koelling Rd 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	Direct burnable vegetation

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

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

Violations Reported to EPA

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.

Internet Providers

Source: FCC Broadband Data Collection, based on 11 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Wisper ISP Fixed Wireless	400 / 30
Starlink Satellite	280 / 30
Brightspeed DSL	80 / 10
BlueBit Networks Fixed Wireless	30 / 5
T-Mobile Fixed Wireless	25 / 3

Cell Coverage

4G LTE (outdoors only), no 5G reported

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