Dawn Costello
Real Estate Agent at
Douglas Elliman
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Dawn's Transactions
- Single Family HomeBuyer$780,00011/25/2025
- Single Family HomeBuyer$500,00011/25/2025
- Single Family HomeSeller$979,00008/28/2025
- 55 Midway AvenueLocust ValleySingle Family HomeSeller$1,205,00006/03/2025Dawn outperformed the market - selling this property for 36% over asking price
- Co-OpSeller$223,50001/30/2025
- Single Family HomeSeller$725,00006/27/2024
- 6 Edwards StreetRoslyn HeightsCo-OpBuyer$355,00006/07/2024
More about Dawn Costello
Hi, I’m Dawn! I’m a Long Island Realtor who combines deep community roots with 20+ years of digital marketing experience. I market homes smarter, negotiate confidently, and guide clients with honesty and heart. My approach is simple: be genuine, be responsive, and deliver results. If you’re looking for a Realtor who truly listens and knows how to get things done, let’s chat.
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Dawn Costello