Kellie Lasater

Gateway Realty Group is a residential real estate team at Berkshire Hathaway HomeServices Select Properties, based in O'Fallon, Missouri. We help people buy and sell homes across St. Charles County, St. Louis County and St. Louis City, with particular experience in new construction, relocation, luxury properties, and Lake St. Louis waterfront homes.

Founded in 2020, our team brings together five full-time practicing agents and dedicated marketing and operations staff. All of our agents work with both buyers and sellers, so the advice you receive reflects both sides of a transaction. You get the whole team working for you, not just one agent. If your agent has a scheduling conflict, another team member will step in for a showing, inspection or final walkthrough. You have a primary agent who knows your priorities, backed by a team that stays involved every step of the way.

Local guidance before you choose a home

O'Fallon is the market we sell in most, and our work extends through St. Charles, St. Peters, Wentzville, Lake St. Louis, Cottleville and Dardenne Prairie. We also serve buyers and sellers in Chesterfield, Weldon Spring and communities throughout the St. Louis region, including St. Louis, Jefferson, Lincoln, Warren and Franklin counties.

Choosing a home involves more than finding the right number of bedrooms. We help you compare neighborhoods, property condition, commute considerations, maintenance needs and resale tradeoffs against your budget and priorities. Our Living St. Louis YouTube channel and website livingstlouismo.com provide neighborhood guides, new construction tours and market education, giving you a way to learn the area before you schedule a visit.

Buying a home or relocating to St. Louis

We know how to handle a move to St. Louis, and we've worked with dozens of families who have relocated to the region from elsewhere. We represent first-time buyers, experienced homeowners, and people moving to Missouri from another state or country. Our agents help you evaluate homes, prepare offers, negotiate terms, and navigate inspections through closing. For buyers moving from outside the area, we help organize the search and provide local context that listing photos alone cannot convey. 

Madison Hayes, Kellie Lasater and Tracy Sanders are relocation certified. That distinction is particularly relevant when an employer requires an agent to work through its relocation program. Our team also helps people relocating independently, without an employer-sponsored program.

Buyer representation for new construction

We guide new construction purchases from community and lot selection through the final walkthrough. Our agents help buyers compare builders, floor plans, available homes and upgrade choices while keeping the full purchase budget and timeline in view. We have worked with builders including McKelvey Homes, Lombardo Homes, Fischer Homes, Fischer & Frichtel, Consort Homes, T.R. Hughes Homes, Zykan & Sons Homes, Prestige Custom Homes and Houston Homes.

Your agent helps you understand what to ask before you commit and stays involved as the home progresses. New construction is part of our agents' broader work with buyers and sellers, which also brings resale experience into the conversation.

Selling with a plan built around your property

Our marketing strategy is fully custom and tailored to each property. We start with pricing, preparation and the audience most likely to consider your home. Every listing receives professional 4K photos, flyers, a social media feature and email marketing to more than 1,000 area agents. Our in-house marketing staff coordinates the presentation and distribution.

The rest of the plan depends on the property and your goals. Options can include a YouTube tour, social video, floor plans, postcards, open houses, and invite-only events we promote to our network of buyers and brokers. We offer drone footage and staging for every listing for sellers who want more than standard photos and virtual staging. We recommend the mix that fits your home, budget, and timeline rather than promising the same campaign for every seller.

Luxury, waterfront and investment property sales

Madison Hayes, Lana Prinster, Tracy Sanders and Kellie Lasater hold Berkshire Hathaway HomeServices Luxury Collection certification. Our team works with luxury and custom homes, acreage properties and waterfront homes, including homes on Lake St. Louis. We help buyers evaluate the details of the property and help sellers communicate what makes it worth considering.

We also represent investors buying and selling residential properties. Our business focuses on real estate sales; we do not handle rental searches.

A documented track record and a direct conversation

In 2025, Gateway Realty Group closed 101 transactions totaling $56.4 million in sales volume, counting each side we represented. You can explore our published sales history at livingstlouismo.com/track-record/ and meet Madison Hayes, Kellie Lasater, Tracy Sanders, Lana Prinster and Candy Smothers on our website.

If you are buying, selling, building or planning a move to the St. Louis area, tell us what you are trying to accomplish. We will help you work through the next steps.