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MissouriLake St. LouisSandy Grassmuck
Sandy Grassmuck profile picture
4 reviews

Sandy Grassmuck

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Grassmuck Realty LLC
Prime Agent Badge
22 years of experience
75 sales in last 12 months
800 transactions all-time


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Sells Homes Fast 2022
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Top Luxury Listing Agent 2022
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Top Lake St. Louis Brokerage 2022

Business Highlights

Women-owned & operated icon

Women-owned & operated

24/7 availability icon

24/7 availability

22 years in business icon

22 years in business

Relocation specialist icon

Relocation specialist

Luxury home specialist icon

Luxury home specialist

Born and Raised in the area with an intimate knowledge of this region, has helped over 800 families with their real estate needs.

About Sandy

Sandy Grassmuck has been in the real estate industry for over 19 years and is the Owner/Managing Broker of Grassmuck Realty, LLC, an independent brokerage with locations in Lake St. Louis and Fenton. Her company has been named The Best of 2020, Lake St. Louis and Top 50 Businesses in St. Charles County. She has been named Realtor of the Year 2018 by St. Charles Realtors and Entrepreneur of the Year 2018 by Women's Council of Realtors, Missouri. She has earned several designations from the National Association of Realtors. Sandy is the 2020 President for St. Charles Realtors, 2021 President for Womens Council of Realtors Missouri and a Director for Missouri Realtors. Additionally, she is very involved, a major investor and in the Hall of Fame for the Realtor Political Action Committee, defending homeowner rights! Grassmuck Realty, LLC is a company of top real estate professionals servicing the following counties in Missouri; St. Charles, St. Louis, Jefferson, Lincoln and Warren.
Travel, Entertaining, Family

Real Estate, Business, Accounting

Specialties & Awards


We pride ourselves with providing outstanding service to our clients. We are a referral based company.


Buyer Representative
Distressed Properties
First Time Buyers
Luxury Properties
Military (relocation)
New Construction
New Homes
Second Homes
Seller Representative
Short Sales
Single-Family Homes
VA loans


The Best of Lake St. Louis 2020, Real Estate Agency, Member of the Year 2019, Women's Council of Realtors, Realtor of the Year 2018, Entrepreneur of the Year 2018

Sandy Grassmuck's Video

Sandy Grassmuck's Reviews (4)

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Highly likely to recommend
Review Date
Robert C. sold a home in Sarasota

She was knowledgeable professional and came through on every issue. Maybe the best agent we have ever used and we have used many over the years!

Highly likely to recommend
Closed Date
Terry M. sold a home in O'Fallon, MO

I have dealt with Realtors throughout my life and I can honestly say, Sandy is by far the best. She keeps you posted and you are never left guessing on what is happening. Sandy will text and email you to make sure you are aware of everything. There are millions of realtors out there, but if you want the best call Sandy.

Highly likely to recommend
Closed Date
Nithil J. bought a home in O'Fallon

Great Service by Sandy. Will be referring to any one interested to buy a home.

Highly likely to recommend
Closed Date
Mike G. bought a home in Lake St. Louis, MO

Sandy did a fabulous job finding us our new home. She took the time to understand our desires and worked hard to find us the right house in the right area. She is very energetic and responsive. I highly recommend Sandy for your real estate needs.

Usually responds in 10 minutes
Open 9:00 AM - 5:00 PM