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Dawn Costello

Douglas Elliman
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Recent Sales

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  • $430,000
    2 bd1 ba900 sqft Roslyn Heights, NY
    2 bd1 ba900 sqft
    Roslyn Heights, NY
    Sold 2 months ago
    BuyerSeller
    7 Edwards #2G, Roslyn Heights, NY, 11577
  • $1,100,000
    4 bd3 ba0 sqft Glen Cove, NY
    4 bd3 ba0 sqft
    Glen Cove, NY
    Sold 3 months ago
    Buyer
    10 Sherman, Glen Cove, NY, 11542
  • $500,000
    2 bd1 ba540 sqft Sea Cliff, NY
    2 bd1 ba540 sqft
    Sea Cliff, NY
    Sold 7 months ago
    Buyer
    117 12th Avenue, Sea Cliff, NY, 11579
  • $979,000
    4 bd3 ba3,050 sqft Glen Cove, NY
    4 bd3 ba3,050 sqft
    Glen Cove, NY
    Sold 10 months ago
    Seller
    43 E Harwood Drive, Glen Cove, NY, 11542
  • $1,205,000
    3 bd2 ba1,324 sqft Locust Valley, NY
    3 bd2 ba1,324 sqft
    Locust Valley, NY
    Sold 1 year ago
    Seller
    55 Midway Avenue, Locust Valley, NY, 11560
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4
Sales last 12 months
29
Total sales
$223K-$1.2M
Price range
$703K
Average price

Get to know Dawn Costello

Licensed Real Estate Salesperson

Specialties
Buyer's AgentListing AgentRelocationForeclosureCommercial PropertiesFirst Time HomebuyersInvestment PropertiesRentalsLuxury Homes
8 Years of experience

Dawn Costello's sales and listings (30)

This map and property list shows the most recent 100 sales and 100 listings

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Sold (29)

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For sale (1)

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Dawn Costello's reviews (32)

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  • 5.0
    • 5/26/2026
    • rheanewman16

    Sold a home in 2026.

    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 ca...
    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 a...
    5.0
    • 5/19/2026
    • Giovanni Giuga

    Found a tenant for a home.

    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 diligen...
    Dawn was an absolute pleasure to work with throughout the entire rental process. She was communicative, organized, and professiona...
  • 5.0
    • 3/26/2026
    • william hollingsworth

    Bought a Single Family home in 2026 in Glen cove, NY.

    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 wal...
    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 ...
    5.0
    • 3/1/2026
    • Veronika Dolar

    Found a tenant for a home.

    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 t...
    We had a wonderful experience working with Dawn! From the very beginning, she was incredibly helpful, knowledgeable, and generous ...
  • 5.0
    • 8/11/2025
    • Erin Connell

    Sold a Single Family home in 2025 in Locust valley, NY.

    Dawn is simply the best! She’s been with us through every stage—helping us find the perfect rental, guiding us through buying our first home, and then selling it for a fa...
    Dawn is simply the best! She’s been with us through every stage—helping us find the perfect rental, guiding us through buying our ...
    5.0
    • 8/8/2025
    • don meyer

    Bought a Condo home in 2025 in Forest hills, Queens, NY.

    Dawn went above and beyond throughout the entire process of my CO-OP purchase. Her professionalism, attention to detail, and constant support made everything smooth and s...
    Dawn went above and beyond throughout the entire process of my CO-OP purchase. Her professionalism, attention to detail, and const...
  • 5.0
    • 6/19/2025
    • TaylorCuster9

    Helped me rent a Multiple Occupancy home in Oyster bay, NY.

    Our experience was wonderful! Dawn listened to what we were looking for and helped us find our perfect next step. Moving from out of town, she helped us learn about the a...
    Our experience was wonderful! Dawn listened to what we were looking for and helped us find our perfect next step. Moving from out ...
    5.0
    • 1/20/2025
    • frank longobucco

    Found a tenant for a Multiple Occupancy home in Glen cove, NY.

    Dawn was an absolute pleasure to work with. Her professionalism and expertise helped us understand the current rental landscape and help set the right rental rate for ou...
    Dawn was an absolute pleasure to work with. Her professionalism and expertise helped us understand the current rental landscape a...
  • 5.0
    • 6/14/2024
    • Bbokovsky

    Bought a Condo home in 2024 in Roslyn heights, NY.

    Highly recommended!!! Let's start from the end. --- What I said after closing. " You are awesome. You are like a relative!" ----How I found Dawn My son-in-law's mom r...
    Highly recommended!!! Let's start from the end. --- What I said after closing. " You are awesome. You are like a relative!" ---...
    5.0
    • 2/16/2024
    • devldogz

    Sold a home in 2023.

    Dawn did an outstanding job helping me sell the house. She had great knowledge of the geographical area and was able to determine a reasonable market value of the house. ...
    Dawn did an outstanding job helping me sell the house. She had great knowledge of the geographical area and was able to determine ...
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Dawn Costello

Douglas Elliman
4sales last 12 months
29total sales
$223K-$1.2Mprice range
$703Kaverage price
8years of experience