Homes for sale under $400k in O'Fallon, IL

58 homes

Sort:

Price (high to low)

READY TO BUILDVIDEO TOUR

ABOUT THIS HOME
Homes for sale under $400k in O'Fallon, IL
The Franklin floor plan offers a delightful combination of traditional charm and modern functionality. With 1,776 sq. ft. , 3 bedrooms, 2.5 bathrooms, and a spacious 2-car garage, this home is perfect for families looking for an inviting and efficient living space.

$398,400

3 beds3.5 baths1,776 sq ft

The Franklin Plan, O'fallon, IL 62269

2 parking spots • Listed 736 days

Listing provided by Zillow

READY TO BUILD

$397,000

3 beds2 baths1,663 sq ft

The Carnegie Plan, O'fallon, IL 62269

2 parking spots • Listed 736 days

Listing provided by Zillow

READY TO BUILD

ABOUT THIS HOME
Homes for sale under $400k in O'Fallon, IL
The Whitney floor plan is a charming and practical home designed to cater to the needs of modern families. With 1,501 sq. ft. , 3 bedrooms, 2 bathrooms, and a convenient 2-car garage, this home provides a cozy yet functional space perfect for everyday living. First Floor Features Great Room: The Great Room serves as the heart of the home, providing a spacious and inviting area for relaxation or entertaining. Its open layout seamlessly connects to the kitchen and breakfast area, making it ideal for family gatherings. Gourmet Kitchen: The kitchen is thoughtfully designed with ample counter space, modern appliances, and an optional kitchen island for additional prep space. The adjacent breakf

$394,000

3 beds2 baths1,528 sq ft

The Whitney Plan, O'fallon, IL 62269

Gourmet kitchen • Great room • 2 parking spots

Listing provided by Zillow

NEW CONSTRUCTION

ABOUT THIS HOME
Homes for sale under $400k in O'Fallon, IL
The Whitney is one of several floor-plans available to be built in this community, by award-winning Illinois home builder Fulford Homes. With a quick build timeline and easy process, you could be moving into a brand-new home with your own personal selections! The included features built into the base price of a Fulford Home are truly exceptional, including: 9’ Ceilings on the first floor of all homes, granite countertops, stainless steel appliances, architectural shingles, a choice of 6 different styles of interior doors, and much more! Fulford Homes has an amazing team you would work with to build your home, and the quality is backed by a new home warranty, giving you peace of mind.

$391,600

3 beds2 baths1,518 sq ft

108 Chickasaw Ln, O Fallon, IL 62269

9 ceilings • Granite countertops • 0.25 acre lot

OPEN SUN, 12PM TO 2PM

ABOUT THIS HOME
Homes for sale under $400k in O'Fallon, IL
Welcome to 607 Shamrock Drive, a striking two-story brick home, fully renovated and ready for its new owner. As you arrive, the mature landscaping and classic exterior details create an inviting first impression. Inside, a bright foyer with wood flooring and an elegant staircase leads to a formal dining room with stylish lighting and crisp trim work and crown molding, as well as a front living room—also perfect as a home office—featuring French doors and abundant natural light. The spacious family room, highlighted by a stunning brick fireplace and large bay window, offers a warm and welcoming space. The kitchen wows with neutral cabinetry, center island with breakfast bar, stai

$389,900

4 beds2.5 baths2,136 sq ft

607 Shamrock Dr, O Fallon, IL 62269

Bright foyer • Formal dining room • French doors

Property at The Whitney Plan, O'fallon, IL 62269, 3 beds, 2 baths

$383,000

3 beds2 baths1,588 sq ft

The Whitney Plan, O'fallon, IL 62269

Listing provided by Zillow

Property at 1551 N Parc Grove Ct, O Fallon, IL 62269, 4 beds, 2.5 baths

$375,000

4 beds2.5 baths1,826 sq ft

1551 N Parc Grove Ct, O Fallon, IL 62269

Property at 1501 Keck Ridge Dr, O Fallon, IL 62269, 4 beds, 3.5 baths

$360,000

4 beds3.5 baths2,641 sq ft

1501 Keck Ridge Dr, O Fallon, IL 62269

Property at 1205 Shadow Ridge Xing, O Fallon, IL 62269, 3 beds, 2.5 baths

$359,900

3 beds2.5 baths2,416 sq ft

1205 Shadow Ridge Xing, O Fallon, IL 62269

Property at 928 Northridge Ct, O Fallon, IL 62269, 3 beds, 3.5 baths

$359,900

3 beds3.5 baths2,952 sq ft

928 Northridge Ct, O Fallon, IL 62269

Property at 809 Deer Creek Rd, O Fallon, IL 62269, 4 beds, 3.5 baths

$355,000

4 beds3.5 baths2,683 sq ft

809 Deer Creek Rd, O Fallon, IL 62269

Property at 439 Bandmour Pl, O Fallon, IL 62269, 2 beds, 2 baths

$350,000

2 beds2 baths1,456 sq ft

439 Bandmour Pl, O Fallon, IL 62269

Property at 1413 Schwarz Meadow Dr, O Fallon, IL 62269, 4 beds, 3 baths

$345,000

4 beds3 baths2,338 sq ft

1413 Schwarz Meadow Dr, O Fallon, IL 62269

Property at 14 Shallowbrook Dr, O Fallon, IL 62269, 3 beds, 2.5 baths

$345,000

3 beds2.5 baths3,748 sq ft

14 Shallowbrook Dr, O Fallon, IL 62269

Property at 204 W State St, O'fallon, IL 62269, 3 beds, 2.5 baths

$342,500

3 beds2.5 baths1,600 sq ft

204 W State St, O'fallon, IL 62269

Property at 1446 Willoughby Dr, O Fallon, IL 62269, 3 beds, 2 baths

$339,900

3 beds2 baths2,676 sq ft

1446 Willoughby Dr, O Fallon, IL 62269

Property at 421 W Highway 50, O Fallon, IL 62269, 3 beds, 2 baths

$339,500

3 beds2 baths1,500 sq ft

421 W Highway 50, O Fallon, IL 62269

Property at 110 Pierce Blvd, O Fallon, IL 62269, 4 beds, 2.5 baths

$320,000

4 beds2.5 baths2,321 sq ft

110 Pierce Blvd, O Fallon, IL 62269

Property at 326 Dewitt Ct, O Fallon, IL 62269, 3 beds, 2 baths

$317,500

3 beds2 baths2,100 sq ft

326 Dewitt Ct, O Fallon, IL 62269

Property at 1439 Kingsley Dr, O Fallon, IL 62269, 4 beds, 3.5 baths

$315,000

4 beds3.5 baths1,023 sq ft

1439 Kingsley Dr, O Fallon, IL 62269

Property at 1009 Timber Creek Ln, O Fallon, IL 62269, 3 beds, 2.5 baths

$314,900

3 beds2.5 baths2,600 sq ft

1009 Timber Creek Ln, O Fallon, IL 62269

Property at 846 Harbor Woods Dr, Fairview Heights, IL 62208, 4 beds, 3.5 baths

$300,000

4 beds3.5 baths2,314 sq ft

846 Harbor Woods Dr, Fairview Heights, IL 62208

Property at 201 W Washington St, O Fallon, IL 62269, 3 beds, 2 baths

$299,900

3 beds2 baths1,076 sq ft

201 W Washington St, O Fallon, IL 62269

Property at 307 E Washington St, O Fallon, IL 62269, 3 beds, 2.5 baths

$299,500

3 beds2.5 baths1,900 sq ft

307 E Washington St, O Fallon, IL 62269

Property at 805 Belpre Dr, O Fallon, IL 62269, 4 beds, 2.5 baths

$299,000

4 beds2.5 baths2,656 sq ft

805 Belpre Dr, O Fallon, IL 62269

Property at 1230 Three Rivers Dr Unit 6B, O Fallon, IL 62269, 3 beds, 2.5 baths

$296,500

3 beds2.5 baths1,900 sq ft

1230 Three Rivers Dr Unit 6B, O Fallon, IL 62269

Property at 1214 Applewhite Rd, O Fallon, IL 62269, 3 beds, 2 baths

$295,000

3 beds2 baths2,064 sq ft

1214 Applewhite Rd, O Fallon, IL 62269

Property at 1307 Kim Dr, O Fallon, IL 62269, 3 beds, 2 baths

$285,000

3 beds2 baths2,106 sq ft

1307 Kim Dr, O Fallon, IL 62269

Property at 414 E 4th St, O Fallon, IL 62269, 3 beds, 1.5 baths

$285,000

3 beds1.5 baths1,559 sq ft

414 E 4th St, O Fallon, IL 62269

Property at 223 Shoreline Dr, O'fallon, IL 62269, 3 beds, 2.5 baths

$269,000

3 beds2.5 baths1,516 sq ft

223 Shoreline Dr, O'fallon, IL 62269

Property at 108 Orchard St, O Fallon, IL 62269, 3 beds, 2 baths

$265,000

3 beds2 baths1,600 sq ft

108 Orchard St, O Fallon, IL 62269

Property at 509 Long Dr, O Fallon, IL 62269, 4 beds, 2 baths

$264,900

4 beds2 baths1,620 sq ft

509 Long Dr, O Fallon, IL 62269

Property at 708 N Smiley St, O Fallon, IL 62269, 4 beds, 2.5 baths

$249,900

4 beds2.5 baths2,264 sq ft

708 N Smiley St, O Fallon, IL 62269

Property at 205 Belt Ave, O Fallon, IL 62269, 3 beds, 1 bath

$225,000

3 beds1 bath1,630 sq ft

205 Belt Ave, O Fallon, IL 62269

Property at 603 W Madison St, O Fallon, IL 62269, 4 beds, 1.5 baths

$220,000

4 beds1.5 baths1,536 sq ft

603 W Madison St, O Fallon, IL 62269

Property at 402 Willow Dr, O Fallon, IL 62269, 3 beds, 1 bath

$215,000

3 beds1 bath1,181 sq ft

402 Willow Dr, O Fallon, IL 62269

Property at 611 Linden Ct, O Fallon, IL 62269, 4 beds, 2 baths

$210,000

4 beds2 baths1,536 sq ft

611 Linden Ct, O Fallon, IL 62269

Property at 205 Main St, O Fallon, IL 62269, 4 beds, 1 bath

$200,000

4 beds1 bath1,909 sq ft

205 Main St, O Fallon, IL 62269

Property at 104 W Jackson St, O Fallon, IL 62269, 3 beds, 1 bath

$199,900

3 beds1 bath900 sq ft

104 W Jackson St, O Fallon, IL 62269

Property at 720 Westbrook Ct, O Fallon, IL 62269, 4 beds, 2 baths

$199,500

4 beds2 baths1,904 sq ft

720 Westbrook Ct, O Fallon, IL 62269

Property at 936 Saint Clair St, O Fallon, IL 62269, 3 beds, 2 baths

$198,000

3 beds2 baths1,329 sq ft

936 Saint Clair St, O Fallon, IL 62269

Viewing page 1 of 2

Based on information submitted to the MLS GRID as of Sat Nov 22 2025. All data is obtained from various sources and may not have been verified by broker or MLS GRID. Supplied Open House Information is subject to change without notice. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information.

Homes for sale under $400k in O'Fallon

There are currently 58 homes for sale under $400k in O'Fallon. Some of these homes are "Hot Homes," meaning they're likely to sell quickly. Most homes for sale in O'Fallon stay on the market for 44 days and receive 1 offers. Popular neighborhoods include Fountain Place. This map is refreshed with the newest listings in O'Fallon every 15 minutes.

In the past month, 27 homes have been sold in O'Fallon. In addition to houses in O'Fallon, there were also 4 condos, 5 townhouses, and 2 multi-family units for sale in O'Fallon last month. O'Fallon is a minimally walkable city in St. Clair County with a Walk Score of 25. O'Fallon is home to approximately 27,401 people and 9,565 jobs. Find your dream home in O'Fallon using the tools above. Use filters to narrow your search by price, square feet, beds, and baths to find homes that fit your criteria. Our top-rated real estate agents in O'Fallon are local experts and are ready to answer your questions about properties, neighborhoods, schools, and the newest listings for sale in O'Fallon. Our O'Fallon real estate stats and trends will give you more information about home buying and selling trends in O'Fallon. If you're looking to sell your home in the O'Fallon area, our listing agents can help you get the best price. Redfin is redefining real estate and the home buying process in O'Fallon with industry-leading technology, full-service agents, and lower fees that provide a better value for Redfin buyers and sellers.

More real estate resources for O'Fallon, IL

More to explore in O'Fallon, IL

Featured
Price

How to buy a house in O'Fallon, IL

How much house can I afford?

How to buy a house in 10 steps

First-time homebuyer's guide

See more home buying guides

Popular Markets in Illinois

Chicago homes for sale
$350,000
Naperville homes for sale
$630,000
Schaumburg homes for sale
$299,900
Arlington Heights homes for sale
$430,000
Glenview homes for sale
$759,000
Oak Park homes for sale
$372,450
Evanston homes for sale
$435,000
Des Plaines homes for sale
$385,000
Orland Park homes for sale
$379,450
Downers Grove homes for sale
$520,000
Mount Prospect homes for sale
$425,000
St. Charles homes for sale
$460,000
Skokie homes for sale
$442,000
Glen Ellyn homes for sale
$554,950
Northbrook homes for sale
$565,000

Download the Redfin App on the Apple App Store

Download the Redfin App from the Google Play Store

Join us

Become an Agent

Get referrals

Careers

Find homes faster

About us

Why Redfin?

Community Impact

Diversity & Inclusion

Find us

Subsidiaries

Affiliated Business

Countries

United States

Canada

Updated September 2025: By searching, you agree to the Terms of Use, and Privacy Policy.

Do not sell or share my personal information.

REDFIN and all REDFIN variants, WALK SCORE, and the R logos, are trademarks of Redfin Corporation, registered or pending in the USPTO.

California DRE #01521930

Redfin is licensed to do business in New York as Redfin Real Estate. NY Standard Operating Procedures

New Mexico Real Estate Licenses

TREC: Info About Brokerage Services, Consumer Protection Notice

All mortgage lending products and information are provided by Rocket Mortgage, LLC | NMLS #3030; www.NMLSConsumerAccess.org. Licensed in 50 states. This site is not authorized by the New York State Department of Financial Services for mortgage solicitation or loan applications activities related to properties located in the State of New York.

Redfin Corporation is an affiliated business of Rocket Limited Partnership. Each company, and their subsidiaries, are separate legal entities operated and managed through its own management and governance structures.

If you are using a screen reader, or having trouble reading this website, please call Redfin Customer Support for help at 1-844-759-7732.

REDFIN IS COMMITTED TO AND ABIDES BY THE FAIR HOUSING ACT AND EQUAL OPPORTUNITY ACT. READ REDFIN'S FAIR HOUSING POLICY AND THE NEW YORK STATE FAIR HOUSING NOTICE.

Homes for sale under $400k in O'Fallon, IL

Homes for sale under $400k in O'Fallon

More real estate resources for O'Fallon, IL

Neighborhoods

Zip Codes

Nearby Cities

More to explore in O'Fallon, IL

How to buy a house in O'Fallon, IL

Popular Markets in Illinois