SOLD FEB 20, 2026

Last listed at $435,000, closed on feb 2026

$439,560

•

1,984

sq ft

155 Keystone Ridge Dr, O Fallon, MO 63366

About this home

Don’t miss your chance to own this charming home in a highly desirable O’Fallon neighborhood! This gorgeous 3-bedroom, 2-bath home with a 3-car garage offers nearly 2,000 sq. ft. of main-floor living—plenty of room for everything and everyone! You’ll love the beautiful hardwood floors, vaulted ceilings, tons of natural light, spacious Great Room feels warm and inviting. The primary suite is a true standout with its large walk-in closet and a bright master bath featuring a separate tub and shower, plus convenient his-and-hers vanities. Two additional generously sized bedrooms and a roomy hall bath complete the main level, along with a super convenient main-floor laundry. Step outside to the deck and patio—perfect for entertaining, grilling, or simply enjoying a peaceful morning cup of coffee. This home also features a whole-house water purification system, adding an extra touch of comfort and quality. The lower level features an egress window and a rough-in for a future bathroom, giving you the opportunity to expand and make the space your own. All of this in a prime location near parks, shopping, restaurants, and major highways. Great house, great location, great opportunity!

Single-familyProperty Type

2019Year Built

8,999 sq ftLot Size

$222Est. Price/Sq.Ft.

3 car garageParking

Listed by Jodie Tiberghien • Coldwell Banker Realty - Gundaker

Bought with James Moll • Coldwell Banker Realty - Gundaker

Redfin checked: 2 minutes ago

•Source:MARIS as Distributed by MLS Grid #25076846

Redfin Estimate

$439,560

$4,560 over list price of $435K

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 14% higher than the average sale price ($386K) of 6 comparable homes.

SOLD AUG 21, 2026
$500,000
A
3 beds2.5 baths2,012 sq ft
345 Mystic Brook Dr, O Fallon, MO 63366
SOLD SEP 10, 2026
$375,000
B
3 beds2.5 baths1,748 sq ft
46 Red Brook Ct, O Fallon, MO 63366
SOLD AUG 20, 2026
$400,000
C
3 beds2 baths1,740 sq ft
518 Brookside Forest Ct, O Fallon, MO 63366
SOLD AUG 26, 2026
$339,000
D
3 beds2 baths1,537 sq ft
512 Rifle Ridge Dr, Wentzville, MO 63385
SOLD JUL 23, 2026
$375,000
E
3 beds2 baths1,786 sq ft
248 Thorn Brook Dr, O Fallon, MO 63366
SOLD JUL 31, 2026
$324,999
F
3 beds2 baths1,530 sq ft
696 Springfield Dr, Wentzville, MO 63385

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Earn from this home

Sell

$412,245

Est. take-home

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Rent

$2,563/mo

Redfin rental estimate

List your home for rent

Market trends in 63366, MO

Last updated September 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price

101.6%

0.2% MoM

Median sale price

$381K

$0 MoM

Avg. days on market

10d

3 days MoM

Recently sold homes

184

9 MoM

New listings for sale

NEW 57 MINS AGO
$325,000
2 beds2 baths1,446 sq ft
10 Thoreau Ct, O Fallon, MO 63366
$129,900
1 bed1 bath562 sq ft
304 W Pitman St, O Fallon, MO 63366
COMING SOON
$400,000
3 beds2.5 baths2,410 sq ft
1353 Apple Valley Dr, O Fallon, MO 63366
$350,000
3 beds2 baths1,800 sq ft
11 Fawn View Ln, O Fallon, MO 63366
$499,900
5 beds3.5 baths3,356 sq ft
408 Saint Gemma Dr, O Fallon, MO 63366
$234,900
3 beds1.5 baths910 sq ft
204 Allen Dr, O Fallon, MO 63366
3D WALKTHROUGH
$450,000
4 beds4 baths4,267 sq ft
1615 Wainscott Ct, O Fallon, MO 63366
$249,000
2 beds1 bath1,014 sq ft
408 Raymond Dr, O Fallon, MO 63366
3D WALKTHROUGH
$339,900
3 beds2 baths2,104 sq ft
341 Westbrook Dr, O Fallon, MO 63366
3D WALKTHROUGH
$499,000
4 beds3.5 baths3,480 sq ft
759 Obrecht Ln, O Fallon, MO 63366
See all

Provided by Redfin

Sale history for 155 Keystone Ridge Dr

Date

Event

Price

Public Records

Feb 25, 2026

Sold

$425,000

$214/sq ft

MARIS as Distributed by MLS Grid #25076846

Feb 20, 2026

Sold

Dec 19, 2025

Pending

—

Dec 10, 2025

Price Changed

$435,000

$219/sq ft

Nov 20, 2025

Listed

$439,900

$222/sq ft

Nov 18, 2025

Coming Soon

$439,900

$222/sq ft

Public Records

Apr 4, 2023

Sold

$399,000

$201/sq ft

MARIS as Distributed by MLS Grid #23004827

Apr 4, 2023

Sold

Mar 5, 2023

Pending

—

Jan 31, 2023

Listed

$400,000

$202/sq ft

+13

Fantastic home in sought after location! Windows create a light filled interior with well placed neutral accents. You'll love cooking in this kitchen, complete with a spacious center island and a sleek backsplash. Head to the spacious primary suite with good layout and closet included. Extra bedrooms add nice flex space for your everyday needs. In the primary bathroom you'll find a separate tub and shower, plus plenty of under sink storage. The back yard is the perfect spot to kick back with the included sitting area. A must see! This home has been virtually staged to illustrate its potential.

Public Records

Jan 17, 2023

Sold

$429,000

$216/sq ft

MARIS as Distributed by MLS Grid #19002779

Jul 25, 2019

Sold

Jul 1, 2019

Pending

—

Jun 26, 2019

Price Changed

$314,332

$158/sq ft

Jun 26, 2019

Relisted

—

Jun 26, 2019

Pending

—

May 7, 2019

Price Changed

$305,749

$154/sq ft

Feb 15, 2019

Price Changed

$299,249

$151/sq ft

Jan 15, 2019

Listed

$292,400

$147/sq ft

Tax history for 155 Keystone Ridge Dr

*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.

Public record

Public record
Zoning
Permits

Beds

Baths

Stories

Lot width

—

Lot depth

—

Lot size

8,999 Sq. Ft.

Year renovated

—

Sq. Ft.

1,984

Year built

2019

Style

Single Family Residential

County

St. Charles County

APN

2-0048-C585-00-0026.0000000

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Aug 7, 2026.

R-1

PUD

Single-Family Residential District

This District is composed of those areas of the City whose principal use is and ought to be low-density single-family dwellings. The regulations of this District are designed to create and preserve a predominately urban character as evidenced by lot sizes, and street and drainage requirements. In addition to the dwelling permitted in this District, certain compatible recreational and public uses are conditionally allowed and strictly regulated to ensure harmony with the principal use of this District.

Zone overlays

Planned Unit Development District

Permitted uses

Include but are not limited to:

Housing-Single unit
Communications tower
Park & open space

Nov 7, 2019 • Final

Building-accessory structures - fence / shed / barn / garage / wall / pavilion / gazebo / misc

Work on a fence.

ADU

Jan 8, 2019 • Final

Building-residential new construction - single- multi-family / mobile home / modular

New construction

Permit history is from public records and may be incomplete or inaccurate. Redfin and its agents make no representations about the property condition or permit status. Buyers should independently verify all information.

Property details

Parking

Parking Information
Parking Features: Garage, Garage Door Opener, Off Street
Garage Spaces: 3
Has Attached Garage
Has Garage

Interior

Virtual Tour

Bedroom Information
# of Bedrooms: 3
# of Bedrooms Main: 3
Main And Upper Level Bedrooms: 3
Upper Level Bedrooms: 0
Lower Level Bedrooms: 0

Bathroom Information
# of Full Baths (Total): 2
Main Level Bathrooms Half: 0
Main Level Bathrooms Full: 2
Main And Upper Level Bathrooms: 2
Upper Level Bathrooms Half: 0
Upper Level Bathrooms Full: 0
Lower Level Bathrooms Half: 0
Lower Level Bathrooms Full: 0

Basement Information
Has Basement
Basement Features: 9 ft + Pour, Concrete, Egress Window, Roughed-In Bath, Unfinished

Other Rooms Information
Room Count: 0
# of Rooms: 6

Heating & Cooling
Heating Information: Forced Air, Natural Gas
Cooling Information: Central Air

Exterior

Building Information
Construction Materials: Brick, Vinyl Siding

Pool Information
Pool YN: 0

Property Information
Property Type: Residential
Property Sub Type: Single Family Residence
Above Grade Finished Area: 1,984
Above Grade Finished Area Source: Assessor

Lot Information
Lot Features: Back Yard, Many Trees, Private, Wooded
Lot Size Acres: 0.2066
Lot Size Dimensions: 60x150x60x15

Financial

Tax Information
Tax Annual Amount: $4,678
Tax Year: 2024
Property Assessment City Tax YN: 0

Lease / Rent Details
Lease Considered YN: No

Financial Information
Second Mortgage YN: 0

Utilities

Utility Information
Water Source: Public
Electric: Ameren
Sewer: Public Sewer
Utilities: Electricity Connected

Location

HOA Information
Association Name: Keystone Ridge
Has HOA
Association Amenities: None
Association Fee: $400
Association Fee Frequency: Annually
Association Fee Includes: Maintenance Grounds, Common Area Maintenance, Snow Removal

School Information
Elementary School: Mount Hope Elem.
Middle Or Junior High School: Ft. Zumwalt North Middle
High School: Ft. Zumwalt North High
High School District: Ft. Zumwalt R-II

Location Information
Address Line: 155 Keystone Ridge DR, OFLLN MO 63366

Public facts

Beds: 3
Baths: 2.0
Sq. Ft.: 1,984
Stories: 1.0
Lot Size: 8,999 square feet
Style: Single Family Residential
Year Built: 2019
Year Renovated: —
County: St. Charles County
APN: 2-0048-C585-00-0026.0000000

Home facts updated by county records on Aug 7, 2026

Other

Listing Information
Auction YN: 0
Home Warranty YN: No
Seller Consider Concession YN: 1

Home Information
Living Area: 1984
Living Area Source: Assessor
Living Area Srch Sq Ft: 1984.00
Living Area Unknown YN: 1
Above Grade Finished Area Srch Sq Ft: 1984.00
Levels: One

Around this home

Schools

Flint Hill Elementary

Public K-5 • Assigned • 4.2mi

7/10

Ft. Zumwalt North Middle School

Public 6-8 • Assigned • 4.6mi

8/10

Ft. Zumwalt North High School

Public 9-12 • Assigned • 6.1mi

9/10

Provided by GreatSchools

Lifestyle

Provided by Walk Score and Local Logic

Climate risks

1/10 Flood Factor

Minimal risk of a flood reaching the building in the next 30 years

1/10 Fire Factor

Unlikely to be in a wildfire in next 30 years

4/10 Heat Factor

6 days above 107° expected this year, 17 days in 30 years

2/10 Wind Factor

1% chance of strong winds in next 30 years

1/10 Air Factor

0 unhealthy days expected this year, 0 days in 30 years

Provided by First Street

Historical weather

O Fallon, MO • 63366

Average low and high temperatures (°F)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sun exposure

In this area, properties receive around 9.7 hours in June and 4.2 hours in December, which is comparable to the U.S. average for solar exposure.

9.7 hrs

4.2 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$418,000 – $506,000

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New listings for sale in 63366

NEW 57 MINS AGO

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Home values near 155 Keystone Ridge Dr

Data from public records.

Address	Redfin Estimate
141 Keystone Ridge Drive, O Fallon, MO 4 Beds \| 2.5 Baths \| 3094 Sq. Ft.	$474,778
147 Keystone Ridge Drive, O Fallon, MO 4 Beds \| 2 Baths \| 1840 Sq. Ft.	$402,971

Address	Redfin Estimate
143 Keystone Ridge Drive, O Fallon, MO 4 Beds \| 2.5 Baths \| 2538 Sq. Ft.	$424,797
149 Keystone Ridge Drive, O Fallon, MO 3 Beds \| 2 Baths \| 1609 Sq. Ft.	$381,139

Address	Redfin Estimate
145 Keystone Ridge Drive, O Fallon, MO 3 Beds \| 2 Baths \| 2002 Sq. Ft.	$423,100
151 Keystone Ridge Drive, O Fallon, MO 4 Beds \| 2.5 Baths \| 2674 Sq. Ft.	$475,874

Property information provided by MARIS as Distributed by MLS Grid when last listed in 2025. This data may not match . Learn more.

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