Robertson Allen

A Charleston native with a lifelong passion for the Lowcountry, Robertson Allen has set the standard for luxury real-estate excellence across Charleston County. With more than two decades of experience and a record unmatched in the region, Robertson has represented more $10 million-plus properties than any other agent and consistently ranks as the #1 real-estate agent in Charleston County and the State of South Carolina by RealTrends.

As Founding Partner of The Cassina Group, Charleston’s premier boutique brokerage, Robertson blends deep market intelligence with creative, data-driven strategy to deliver extraordinary results. His precision marketing and negotiation expertise extend across Charleston’s most sought-after areas, from historic South of Broad and The Crescent to Sullivan’s Island, Isle of Palms, Kiawah Island, and South Mount Pleasant’s waterfront enclaves, where his record-setting transactions have redefined luxury benchmarks.

Robertson has reached over $1 Billion in sales since he started selling in 2001. He has represented more transactions over Ten Million Dollars than any other agent in the Charleston MLS. Robertson’s portfolio includes some of the most significant residential sales in Charleston history, including 51 East Bay Street ($21.5 M), 5 East Battery Street ($18.25 M), 202 Bank Street, Old Village of Mount Pleasant ($14 M), 13 & 15 Meeting Street ($12.6 M), and 147 Flyway Drive, Kiawah Island ($11.65 M). His clientele ranges from long-time local families to national executives and international investors drawn to Charleston’s timeless architecture, coastal beauty, and lifestyle.

A graduate of Clemson University, Robertson lives in Charleston with his wife and two sons. He recently co-founded the Real Estate Vector of Clemson University’s Brook T. Smith Launchpad for Entrepreneurship, a program designed to mentor and inspire the next generation of real-estate innovators. He has also previously served on the boards of Historic Charleston Foundation, Charleston Day School, and First Citizens Bank, and continues to support organizations such as Good Friends of the Lowcountry, the American Heart Association, and the Dee Norton Child Advocacy Center.

Outside of work, Robertson enjoys tennis, boating, golfing, hunting, and fishing with his two sons, who attend Porter-Gaud School, as well as exploring Charleston’s renowned culinary scene.

Recent Recognition

• #1 Agent in South Carolina by RealTrends (2024)
• #1 Individual Agent in Charleston County (2023 & 2024)
• $136,455,979 in Closed Sales | $3.6 M Average Sale Price (2024)
• Top 5 Agent in Charleston MLS for overall luxury sales since 2010

Notable Sales
5 East Battery Street, South of Broad - $18,250,000
202 Bank Street, Old Village - $14,000,000
13 & 15 Meeting Street, South of Broad - $12,600,000
13 & 15 E Battery Street, South of Broad - $12,450,000
18 Broad St Unit 801, Downtown - $12,000,000
147 Flyway Drive, Kiawah Island - $11,650,000
2411 Atlantic Avenue, Sullivan's Island - $10,100,000
306 + 308 Ocean Boulevard, Isle of Palms - $10,002,777
15 Broughton Road, The Crescent--$9,250,000
2529 Atlantic Avenue, Sullivan's Island - $9,075,000
39 Meeting Street, South of Broad - $8,900,000
205 Ferry Street, Old Village - $8,400,000
46 S Battery, South of Broad - $8,350,000
3001 Marshall Blvd, Sullivan’s Island - $8,050,000
362 Schweers Lane, Old Village - $8,000,000
27 Lamboll Street, South of Broad - $7,400,000
2402 Goldbug Avenue, Sullivan's Island - $7,205,000
95 S Battery, South of Broad $7,200,000
2411 Atlantic Avenue, Sullivan's Island - $6,850,00
116 Ocean Boulevard, Isle of Palms - $6,800,000
126 Hibben Street, Old Village - $6,250,000
12 Church Street, South of Broad - $6,000,000
310 Ocean Boulevard, Isle of Palms - $5,995,000
2414 Myrtle Avenue, Sullivan’s Island -$5,900,000
1817 Back Street, Sullivan’s Island - $5,660,000
220 Middle Street, Old Village - $5,600,000
2614 Palm Blvd, Isle of Palms - $5,260,000
7 Sayle Road, The Crescent - $5,025,000
17 Legare Street, South of Broad - $5,000,000

Check out Robertson on the podcast, Brokering Billions (June 2022)

LEARN MORE ABOUT ROBERTSON
FAVORITE STREET IN CHARLESTON Lower Meeting Street. Some of the best memories I have as a child involve visiting my great grandfather at his house at 15 Meeting. So much of Charleston's history and my childhood was spent on this street.

FAVORITE RESTAURANT IN CHARLESTON The Ordinary - Mike Lata is not only a client of mine but hands down one of the best chefs in the country.

FAVORITE ACTIVITY OUTSIDE OF WORK Spending time with my family. My wife and two sons love the outdoors and we try our best to enjoy everything the Charleston area has to offer. Boating, fishing and water sports are some of our favorites.

FAVORITE LOCAL PRODUCT John's Island Heirloom tomatoes. So many incredible dishes are made in the Allen home with these amazing fruits.

FAVORITE ANNUAL EVENT Wine + Food Festival. This event has grown so much over the years and the number of famous chefs that participate each year is amazing.

MUST-SEE SPOT IN CHARLESTON High Battery/White Point Gardens. Taking a walk or run around the High Battery is something we as residents take for granted. You can see so many historical sites including Fort Sumter, Morris Island, Castle Pinkney, Sullivan's Island (Fort Moultrie), to name a few. You are literally taking in a panoramic view of the birth of our Nation.

PRAISE FOR ROBERTSON

"Robertson was incredibly helpful while we were looking for a house on Sullivan's Island. It can be very stressful and frustrating buying a house from afar and Robertson always kept us apprised of the situation/negotiations during the entire process. We were completely satisfied with our relationship with The Cassina Group and we feel that Robertson is not just our realtor, but a friend." --Nick Steinsbeger

"We have purchased four properties and sold three in the Old Village of Mount Pleasant with the assistance of Robertson Allen and the team at the Cassina Group since 2008. If you smartly or luckily choose Robertson Allen you get an impressive team package. Robertson is knowledgeable, kind, intelligent and a wonderful listener....We think so much of Robertson and his credibility that we actually bought our current home in April of 2016 without even physically seeing it. He looked. He knew the house. He knows us. We just trusted him and we couldn't be happier." -- Tim & Lindsi Eisenhauer

"From the moment I spoke with Robertson on the phone I knew that he and The Cassina Group were an amazing match for us. Robertson was consistently highly motivated, knowledgeable, professional, and communicative - all qualities I required in a broker.”--Jordan Moore

"[W]e value Robertson’s knowledge, expertise, and professionalism. As two former attorneys and current investment advisers, we believe that--with respect to Robertson--our trust was extremely well-placed."--James and Dianna Goldman

"Earlier this month I used Robertson Allen with The Cassina Group to list and sell my home. They not only made the process completely painless and smooth, they also helped me sell it in record time with their great marketing strategy! My home was under contract in 5 days after listing and I even received a back-up offer shortly thereafter." - Dotty Strobel

"We were very impressed with how hard-working [Robertson] is; before we could ask him to do something, we would learn that he had already done it!" - Anonymous

"During the very involved sales process of my Mother’s family home on Queen St, time and again, I was grateful to be successfully represented by Robertson Allen and The Cassina Group. Robertson is an expert who knows, a professional who performs and a fine man of integrity you can trust." - Sloan Wright

"Working with Robertson Allen was an absolute pleasure. As the listing agent for my penthouse, Robertson was driven, professional and fun (yes, fun) to work with! Our relationship continues. I gave him a “wish list” for my future home. He called one morning to announce “I’ve found it”, and indeed he had!" --T-Mouse Henning

"Amazing experience all around.  Easy transaction and very professional.  Found us a perfect house before it ever hit the market!" --Sarah Hamlin Hastings

"When I called Robertson Allen. at The Cassina Group to ask about the value of my home and the possibility of selling it, he could not have been more responsive and helpful. His advice on what to do to get the house ready as well as his knowledge of perspective buyers was amazing. Every buyer that looked at the house, Except for one, was brought over by the Cassina Group, who eventually sold it for a very good price in a short period of time. Since these were out of town clients, Robertson was amazing at handling all of the intricate details involved with the closing and inspection, etc. Becca, Robertson ‘s assistant, was also extremely helpful. I couldn’t have been happier with the service of The Cassina Group and would definitely use them again and recommend them to anyone." --Sally Rhett

"Robertson and his staff are simply the best. He has represented us as a seller twice and worked miracles. Great experience working with him." --Kim Skaggs

"Robertson Allen was a fantastic agent and helped us find exactly the home our family was looking for. His knowledge of the Charleston area and the local real estate market helped us get into our home quickly in a tight market. Thanks Rober