William Barnwell

Broker Associate, REALTOR®

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Favorite Street in Charleston

Live Oak Drive

Favorite Restaurant in Charleston

Poe’s Tavern

Favorite Activity Outside of Work

Going on the boat

Favorite Local Product

Palmetto Cheese

Favorite Annual Event

Restaurant Week

Must-See Spot in Charleston

Pitt Street Bridge

Client Testimonials

William Barnwell was extremely helpful during our home buying process! This was our first time buying a home, and we felt that he was really looking out for us and had our best interest. He was always readily available to meet and see a new house together. He answered all of our questions thoroughly, and made sure that we were getting the best bang for our buck. When we purchased, he was very thorough throughout the closing process. He negotiated for us, and he had our backs! We are very happy with our new home, and I would highly recommend William to any new home buyers.

Gray Ellender

William Barnwell assisted us with our quick buy on James Island, SC. It can be a tricky market these days. William was excellent from start to finish and especially with the negotiation process.

Cara Riggs

I used William Barnwell with The Cassina Group for my downtown home sale and it couldn't have gone any better! He did a great job with pricing in a difficult situation given minimal comps in the area. I ended up getting a great deal and even a backup offer thanks to his negotiations. He was very communicative, knowledgeable, and easy to deal with throughout the whole process. Other people involved with the sale including my neighbors and my attorney complimented him throughout. I wouldn't hesitate to use him again for a home sale or purchase.

Mary Fox

We had a great experience working with William Barnwell at The Cassina Group. He was patient during our search, helped us navigate the process and kept us well informed! We had such a positive experience working with William - I highly recommend him and The Cassina Group!

Kathleen Kaepplinger


Born and raised in the area, William understands all that the Charleston market has to offer. After graduating from Porter-Gaud School, he earned his degree in Real Estate Finance from Clemson University.

He has experience in new home construction, as well as commercial development. William has been practicing real estate ever since obtaining his broker’s license in 2014 and enjoys educating both buyers and sellers about all options afforded to them.

When he is not working, William can be found with friends and family on the boat, golf course or local sporting events.


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