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    Douglas Elliman 70 Forest Avenue Locust Valley

    70 Forest Avenue
    Locust Valley, NY 11560

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      Dawn Costello

      Dawn Costello

      Locust Valley, NY

      (33)
      33 REVIEWS(5.0/5)
      Pia V.
      August 31, 2026
      Zillow
      VERIFIED
      I cannot say enough wonderful things about **Dawn Costello at Douglas Elliman**. She truly went above and beyond to successfully sell my home, and I am incredibly grateful for everything she did throughout the entire process. From day one, Dawn put so much time, effort, and personal care into preparing my home for sale. She beautifully staged the house and had such an incredible eye for detail. She genuinely cared about presenting the home in the best possible way. But what impressed me most was everything she did behind the scenes. Dawn personally went to the town and worked through all of the logistics involving permits and Certificates of Occupancy. She took the initiative to handle issues, find solutions, and keep everything moving forward. She didnt just tell me what needed to be done aEUR" she went out and made it happen. She gave my home so much **time, attention, effort, and TLC**, and it truly showed. She treated the sale as if it were her own home and was always willing to do whatever was necessary to get the job done. Selling a home can be an emotional and stressful experience, but Dawn made the entire process feel as seamless as possible. Her dedication, responsiveness, professionalism, and genuine commitment to her clients are truly exceptional. I feel very fortunate to have had Dawn in my corner and would **highly, highly recommend her to anyone looking to sell or buy a home**. She is not just a great broker aEUR" she is someone who truly cares, and that makes all the difference. Thank you, Dawn, for everything you did to get us to the finish line!
      Rheanewman16
      May 26, 2026
      Zillow
      VERIFIED
      Dawn Costello did an excellent job in every step of selling my co-op. She knows the market very well and gave me regular updates as to the comp sales in my complex. We came up with a competitive price together and I did better than expected. She advertised my property in all the relevant places using the latest technology to highlight the apartment in the best possible way. She always responded to me promptly and was very friendly to me and potential buyers. My property was on the market must shorter than expected and I have Dawn to thank for that. She helped the closing go as smoothly and quickly as possible and even helped the buyer complete their end of the paperwork to help expedite everything. I would highly recommend working with Dawn!
      William H.
      March 26, 2026
      Zillow
      VERIFIED
      Dawn, recognized my needs in downsizing to a one level house in Glen Cove. My wife is bedridden and we needed to have a house in which she could easily access with a walker and move about indoors with the walker. She is very intuitive. We viewed a lot of listings and she persevered.
      Giovanni G.
      May 19, 2026
      Zillow
      VERIFIED
      Dawn was an absolute pleasure to work with throughout the entire rental process. She was communicative, organized, and professional every step of the way. Her due diligence in screening tenants gave us great confidence, and she was able to find an excellent tenant and rent our home within just one week. She made the entire experience smooth and stress-free, and I would highly recommend her to anyone looking for a knowledgeable and reliable real estate agent.
      Veronika D.
      March 1, 2026
      Zillow
      VERIFIED
      We had a wonderful experience working with Dawn! From the very beginning, she was incredibly helpful, knowledgeable, and generous with her time and advice. She took the time to truly understand our needs, answered all of our questions with patience, and guided us through every step of the process with professionalism and care. What really stood out was how genuinely kind and supportive she is aEUR" you can tell that she truly cares about her clients and wants the best possible outcome for them. Her insights and recommendations were thoughtful, honest, and extremely valuable. If you are looking for a real estate professional who is not only highly competent but also warm, responsive, and trustworthy, I cannot recommend Dawn highly enough.
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