Direct: (302) 650-0820


Dave McCarthy

Prior to living and working in Southern Delaware, Dave served as an officer for the New York Police Department. During his time in New York, Dave spent weekends in Rehoboth Beach restoring homes and enjoying the welcoming downtown community. Through those projects he discovered a newfound passion for real estate and property preservation and renovation. He eventually left New York and became a full time downtown Rehoboth Beach resident to devote his full attention to his dream. Although he made a drastic career change, Dave’s ultimate goal has remained constant; to make a positive impact on the lives of others and on the region he calls home.

Dave has a unique view on being an agent; he sees it as an opportunity to collaborate with his clients, not only throughout the entire process of buying or selling a home but also throughout any future transactions. Any real estate agent can routinely handle a transaction, but Dave offers much more than that. He believes in building relationships with every client by offering his personal experience and expertise to maximize the potential for a successful and fulfilling transaction. Dave has also been a top producer at Mann & Sons since he joined in 2005.

Dave began by purchasing and renovating investment properties in the area, and from there, his list of business endeavors and service offerings expanded as the needs of his clients began to crystallize. Today, Dave McCarthy Companies is a one-stop-shop offering services in real estate sales, real estate development, new construction and renovation, vacation rentals, property management, asset management, and interior design. In each division of the business Dave and his team strive to build lasting client relationships with strong foundations of trust. The visions of his clients are understood and their dreams are brought to fruition through Dave’s laser focus and willingness to go above and beyond.

Direct: (302) 426-2082


Walt Cassel

Walt is a key player on the Dave McCarthy team, not just in the realm of real estate sales, but as the CFO of the network of complementary businesses started by Dave McCarthy. Walt graduated from Philadelphia University with a Bachelor of Science in Accounting and completed his postgraduate work at Villanova University. He is also a certified public accountant (CPA) licensed by the Commonwealth of Pennsylvania. His 27-year career in financial services as a public accountant began at Price Waterhouse Coopers, one of the “Big Four” public accounting firms. From there he moved to Acme Market’s financial operations where he ran their whole non-retail purchasing department. After Acme, Walt moved to NYC and began his career at Grey at Phase Five Communications, Inc. and for over eight years provided support to its President in the management of the business’ financial operations and profitability. He was soon promoted to SVP, Worldwide CFO, and his role expanded to include the financial operations and reporting for all Grey Healthcare Companies, a WPP Company, both domestic and internationally. In 2013 Walt was recruited by Chandler Chicco Agency/Inventiv Health (a Healthcare PR communications company) and in 2015 he left the Healthcare industry and moved to Rehoboth Beach full time to partner with Dave McCarthy in managing and expanding his business operations.

Walt’s approach to real estate is similar to Dave’s. He aims to guide his clients through the entire process, providing savvy advice backed up by his years of experience and expertise. Walt  exercises a driving and dynamic approach towards his work, and he won’t stop until he has provided the best possible options for his clients. He believes in  establishing relationships built on strong foundations of trust that keep his clients coming back for future transactions. Walt’s passion for helping clients navigate the complexities of real estate transactions, paired with his unbeatable knowledge of the Rehoboth Beach real estate market, make him the perfect fit for assisting you with your next big purchase!

Winnie Kee

Winnie was born and raised in Lewes and is a Cape Henlopen High School alum. She raised her two children in Henlopen Acres and served as commissioner and mayor of the municipality before moving to downtown Lewes in 2015. Winnie is an expert when it comes to the Lewes real estate landscape, but her knowledge of the industry spans county wide and is 25 years in the making. She is a trustworthy, dedicated, and enthusiastic Realtor who, above all else, strives to make her clients happy.