ActiveListed today

$999,000

4030 Key Harbour Drive, Lake St. Louis, MO 63367

4

3.5

3,731

No obligation. One of our agents will confirm a time that works for you.

Lot size
0.56 acres
Year built
1996
Days on market
Listed today
Property type
Single Family Residence
HOA
$900/yr HOA
Price per sqft
$268

What's Special

Traditional2 Fireplaces3-Car GarageBasementKey Harbour Estate #3

Your next chapter…a lot more lifestyle! Just steps from the lake and conveniently situated off Lake Saint Louis Boulevard, 4030 Key Harbour Drive is a destination unto itself. Thoughtfully curated interiors and inviting entertaining spaces flow into an extraordinary outdoor oasis through a four-season room, private terraces, and covered and open-air patios. The home’s vintage of 1996 has been beautifully modernized with refined finishes and exceptional amenities. Twelve-foot ceilings and expansive gathering spaces lend scale to the main level and high design throughout offers sophisticated entertaining. A chef’s kitchen appointed with Wolf and Sub-Zero appliances, a striking stone hearth fireplace, a light-filled four-season room and a dedicated office enrich everyday living. The primary suite offers a private terrace, custom walk-in closet and a spa-inspired bath with heated floors, dual vanities, and a wet room featuring a steam shower and jetted tub. The lower level extends the home’s hospitality with an open family room, dining area and kitchen. Three additional bedrooms, two bathrooms and access to private patios offer flexibility for guests or multigenerational living. Beyond the French doors, meandering stone paths unfold into a remarkable landscape designed for recreation and repose. A resort-style pool framed by dramatic boulders and cascading waterfalls anchors the setting, complemented by a sport court, firepit lounge and a lovely garden walk. A three-car smart garage, circular drive and motor court complete the property. If having it all is what you want, look no further! Showings begin Thursday, 11/5/26. Open House Sunday 11/8/26 1-3!

Facts & Features

Interior

9
Bedrooms
4
Full bathrooms
3
Half bathrooms
1
Living area
3,731 sqft
Heating
Forced Air, Gas
Cooling
Ceiling Fan(s), Central Air, Electric
Fireplaces
2
Basement
9 ft + Pour, Bathroom, Concrete, Daylight, Egress Window, Partially Finished, French Drain, Walk-Out Access
Appliances
Stainless Steel Appliance(s), Gas Cooktop, ENERGY STAR Qualified Dishwasher, Disposal, Ice Maker, Microwave, Built-In Electric Oven, Double Oven, Range Hood, Built-In Refrigerator, Wine Cooler, Wine Refrigerator, Bar Fridge

Property

7
Property type
Single Family Residence
Architectural style
Traditional
Year built
1996
Lot size
0.56 acres
Lot features
Back Yard, Garden, Landscaped, Near Golf Course, Private, Scattered Woods, Secluded, Some Trees, Terraced
Garage spaces
3
Waterfront
No

Utilities

2
Water source
Public
Sewer
Public Sewer

Community & Financial

6
Subdivision
Key Harbour Estate #3
County
St. Charles
HOA fee
$900 annually
Annual taxes (2025)
$8,396
Price per sqft
$268
Days on market
0

Schools

District: Wentzville R-IV

Elementary
Green Tree Elem.
Middle
Wentzville South Middle
High
Timberland High

School assignments are provided by the listing and can change; verify with the district.

Listed by Dielmann Sotheby's International Realty · MLS# 26065611 · 314-725-0009 · Active

Location

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MLS GRIDMARIS MLS

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