Sidney Whelan

Sidney Whelan is a veteran real estate professional with over 20 years of experience in New York City’s residential market, known for his exceptional breadth of knowledge and proven track record. Currently a Licensed Real Estate Salesperson with CORE Real Estate since 2013, Sid has successfully closed hundreds of transactions totaling several hundred million dollars in value, serving buyers, sellers, landlords, and tenants across Manhattan, Brooklyn, and Riverdale. His background includes nearly a decade at Halstead Property, where he achieved the title of Senior Vice President and gained deep expertise in co-op, condo, and multi-family transactions. Sid also served as an Onsite Sales Office Manager for several major condominium projects, advising developers on market strategy, sales execution, and turnaround solutions. A lifelong New Yorker with experience as a co-op board president, landlord, and new development consultant, Sid brings both personal insight and professional excellence to every deal. His earlier career in arts marketing further enriches his creative approach to property presentation and client service.