Robertson Allen
Founding Partner & Broker-in-Charge at The Cassina Group
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.
Experience an extraordinary oceanfront lifestyle at 1 44th Avenue, one of Isle of Palms' most thoughtfully designed and meticulously crafted residences. Situated on a quiet street, this private estate features lush, manicured gardens designed by Wertimer and Cline, a full driveway, and a three-car climate-controlled garage. Built in 2017 by Sheppard Construction in collaboration with architect Beau Clowney and acclaimed Charleston designer Cortney Bishop, every element of the home has been carefully curated to create a refined coastalretreat.
Robertson’s expertise spans Charleston’s most sought-after properties — from historic downtown residences to oceanfront and deepwater estates throughout the Lowcountry. As a Charleston native and co-founder of The Cassina Group, he offers an unmatched perspective on the region’s luxury real estate market, blending local insight with global reach.
Robertson’s deep Charleston roots and extensive market expertise allow him to identify the city’s most desirable addresses and investment opportunities. His clients trust him for clear communication, exceptional negotiation skills, and an unwavering commitment to helping them achieve their real estate goals.
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