Gateway Realty Group
Aerial view of homes built by McKelvey Homes at Cottleville Trails in Cottleville, Missouri

New Construction Homes for Sale in Cottleville, MO

A builder's contract is not the standard resale contract, and the sales agent in the model home represents the builder, not you. The upgrade and lot-premium decisions are usually where the money is won or lost.

Homes for Sale
7
Median List Price
$437,000
Avg Price / Sqft
$250
Range
$376K–$1.1M

Homes for sale in New Construction in Cottleville

New Construction in Cottleville

Cottleville Trails is the largest new development in Cottleville, and several surrounding neighborhoods offer newer-built homes. Plus, a few proposed neighborhoods under review will offer more options.

Buying in Cottleville?

We represent buyers here every week. That means a straight answer on what a home is actually worth, early word on what is about to come up, and somebody negotiating for you instead of for the seller.

Aerial view of the playground and pavilions at Legacy Park in Cottleville, Missouri

What is Cottleville actually like to live in?

This page is the inventory. Our guide to living in Cottleville is the other half: it covers Old Town, the neighborhoods, the commute and what daily life is actually like here.

We filmed it, we sell in it, and we wrote it down.

Read the guide

Can't find what you're looking for?

We hear about homes before they hit the market, and we show plenty that are never advertised at all. If nothing above is right, tell us what you want and we will bring you options that are not on this page.

New Construction in Cottleville, by the numbers

New construction homes for sale in Cottleville carry a median list price of $437,000 and run roughly $250 per square foot. The typical listing goes under contract in about 97 days. Asking prices run from $376,000 to $1,051,600.

Where the prices sit

Of what is active today, 57% are priced between $300,000 and $500,000, 14% between $500,000 and $750,000 and 29% above $750,000. About 43% are single-family houses; the rest are condos, villas or townhomes. The median year built is 2026.

Where the listings actually are

A handful of subdivisions account for much of the current inventory, and the spread between them is wide enough that a single median for Cottleville is not a useful number on its own:

Schools

Every one of these listings is in the Francis Howell R-III school district, which simplifies one decision that complicates house hunting almost everywhere else in the region. Confirm the assigned elementary and middle schools address by address rather than by subdivision, since attendance boundaries move.

Based on information from Mid America Regional Information Systems, Inc. for the period October 13, 2026 through October 13, 2026.

Where homes for sale in Cottleville MO actually sit

Most of Cottleville, MO falls in the 63304 postal code, with a smaller piece in 63376 toward St. Peters. The city sits in St. Charles County, Missouri, between St. Charles, Weldon Spring, Dardenne Prairie, and O'Fallon. Route 364 and Route N put it within easy reach of Interstate 64 and the Chesterfield Valley across the river. Legacy Park and the Dardenne Greenway are both here.

What you are choosing between

Cottleville is a small market, and the property types reflect that. You are choosing between detached single-family houses and townhouses, without the villa and condominium inventory that the larger St. Charles County cities carry. Listings move through coming soon, active, active under contract and pending, and the filters above let you keep or exclude each of those.

Thinking about the area itself?

This page is about what is for sale. If you are still deciding whether Cottleville is the right place for you, our guide to living in Cottleville covers Old Town, the neighborhoods, the commute and what daily life is actually like here. To see everything for sale here rather than just new construction, go to all homes for sale in Cottleville.

If you already own a home here and your move starts with a sale, see our page on selling a house in Cottleville.

Keep looking

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MLS GRIDMARIS MLS

Listings courtesy of MARIS as distributed by MLS GRID

Some IDX listings have been excluded from this website.

Based on information submitted to the MLS GRID as of October 13, 2026 at 4:11 PM CDT. 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.

IDX information is provided exclusively for consumers’ personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Any other use or search of this data, including by anyone other than a consumer looking to purchase real estate, is prohibited. Data is deemed reliable but is not guaranteed by MLS GRID.