21 Treeline Dr, O'Fallon, MO 63366
Property image
Property image
OFF MARKET

21 Treeline Dr
O'Fallon, MO 63366

  • 3 Beds
  • 3 Baths
  • 1,782 sqft (on 3.16 acres)

$580,300

Trulia Estimate
as of Jul 9, 2026
Est. Refi. Payment $3,514/mo*

$580,300

Trulia Estimate
as of Jul 9, 2026
Est. Refi. Payment $3,514/mo*
3 Beds
3 Baths
1,782 sqft
(on 3.16 acres)

Local Information

  • Map ViewExplore the area around 21 Treeline Dr.
  • Schools1 Elementary School1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

Description

Discover the serenity of this affordable home on a 3 acre lot, in a 42 home subdivision, that shows pride of ownership throughout. This 3 bedroom 3 full bath home with over 2800 sq ft of living space was built with efficiency in mind. Gas & Electric average less than $130 per month due to the 93% geothermal HVAC, dual hot water heaters (one is a reservoir), interior condenser unit, & Anderson windows. Other features: Vaulted great room & dining room, open kitchen with custom cabinets, center island, breakfast bar & breakfast room. Master bedroom has a bay window & master bath suite, office space or den, tile floors, gas burning fireplace, 50 year shingles, & a four season room that overlooks a level yard. The lower level has a bedroom and rec-room for family enjoyment. Plus, there is a 24x28 fully insulated outbuilding with a wood burning stove, workshop area, & an insulated attic. Stop by and see this home that has been meticulously maintained and ready for a new owner.
21 Treeline Dr, O'Fallon, MO 63366 is a 3 bedroom, 3 bathroom, 1,782 sqft single-family home built in 1999. It last sold for $309,000 on Jun 25, 2015. It is currently off market. The Trulia Estimate is $580,300, with a rent estimate of $2,523/month.

Home Highlights

Parking
Garage
Outdoor
Porch, Patio
A/C
Heating & Cooling
HOA
None
Price/Sqft
No Info
Listed
Less than a day ago

Home Details for 21 Treeline Dr

Interior Features

Interior Details
BasementNumber of Rooms: 5Types of Rooms: Walk In Closet
Heating & Cooling
Heating: Forced Air, GasAir ConditioningCooling System: Geothermal, OtherHeating Fuel: Forced Air
Levels, Entrance, & Accessibility
Stories: 1
Appliances & Utilities
DishwasherMicrowave
Fireplace & Spa
Fireplace

Property Information

Year Built
Year Built: 1999
Property Type / Style
Property Type: Single Family HomeArchitecture: ranch

Exterior Features

Exterior Home Features
Exterior: OtherPatioPorch
Parking & Garage
GarageParking Spaces: 2Parking: Garage Attached, Garage Detached

Community

Units in Building: 1

Lot Information

Lot Area: 3.16 acres

Additional Information

On Site Laundry Available

Price History for 21 Treeline Dr

DatePriceEventSource
06/25/2015--Sold
MARIS #15025694
05/20/2015$309,900PendingAgent Provided
05/08/2015$309,900Listed For SaleAgent Provided
05/25/1999--Sold
N/A

Market trends in Saint Paul

Last updated May 2026
Buyer'sMarketSeller'sMarket
Avg. sale price
Sale-to-List Price
Price per sq ft
Available listings
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Property Tax and Assessment

Year2025
Tax$5,286
Assessment$456,348
Home facts updated by county records

Comparable Sales for 21 Treeline Dr

Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
0.18
Single-Family Home
-
04/24/26
4
4.5
5,395
0.38
Single-Family Home
-
08/21/25
5
3.5
3,690
0.93
Single-Family Home
-
01/22/26
3
2.5
2,057
0.55
Single-Family Home
-
08/15/25
6
3.5
3,131
0.85
Single-Family Home
-
09/11/25
4
3
2,766
0.75
Single-Family Home
-
10/03/25
4
2.5
2,805
0.54
Single-Family Home
-
03/02/26
4
4.5
7,034
0.68
Single-Family Home
-
10/23/25
4
4.5
4,174
0.78
Single-Family Home
-
06/15/26
3
1
1,824
1.14
Single-Family Home
-
12/04/25
4
4
3,333

Nearby homes

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Assigned Schools

These are the assigned schools for 21 Treeline Dr.
The GreatSchools Rating compares schools on a variety of school quality indicators including test scores, college readiness, equity and more. Learn more.

What Locals Say about Saint Paul

At least 3 Trulia users voted on each feature.
  • 100 % Say there's holiday spirit

  • 100 % Say car is needed

  • 100 % Say parking is easy

  • 91 % Say yards are well-kept

  • 89 % Say it's quiet

  • 80 % Say there's wildlife

  • 68 % Say neighbors are friendly

  • 57 % Say it's dog friendly

  • 44 % Say they plan to stay for at least 5 years

  • 43 % Say kids play outside

  • 33 % Say people would walk alone at night

  • 29 % Say there are sidewalks

  • 17 % Say it's walkable to grocery stores

  • 14 % Say streets are well-lit

  • 11 % Say there are community events

Sourced by Trulia users. Learn more about our methodology.
  • Blackarachnia L.
    "Large wooded lots, wild Turkey, deer, birds, peaceful, quiet and beautiful. Country setting in the suburbs. Great place to live."
  • Sherry D.
    "big lots and woods, no traffic quiet, peaceful, wildlife, deer, birds, hummingbirds, privacy, bbqs, flowers, fresh air, sunshine. "
  • Lauriesalmo
    "Country feel with 3 acre lots and lots of farms and wild life - but very convenient to all kinds of shopping and restaurants. "

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Homes for sale near 21 Treeline Dr

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Off Market Homes Near 21 Treeline Dr

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