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Dawn Costello

Douglas Elliman
5.033 reviews
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Recent Sales

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  • $782,000
    4 bd2 ba2,015 sqft Roosevelt, NY
    4 bd2 ba2,015 sqft
    Roosevelt, NY
    Sold 30 days ago
    Seller
    49 Prospect Street, Roosevelt, NY, 11575
  • $693,000
    3 bd1 ba936 sqft Sea Cliff, NY
    3 bd1 ba936 sqft
    Sea Cliff, NY
    Sold 2 months ago
    BuyerSeller
    16 Altamont Avenue, Sea Cliff, NY, 11579
  • $430,000
    2 bd1 ba900 sqft Roslyn Heights, NY
    2 bd1 ba900 sqft
    Roslyn Heights, NY
    Sold 7 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 7 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 11 months ago
    Buyer
    117 12th Avenue, Sea Cliff, NY, 11579
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5
Sales last 12 months
31
Total sales
$223K-$1.2M
Price range
$688K
Average price

Get to know Dawn Costello

Licensed Real Estate Salesperson

Dawn Costello: Sea Cliff & North Shore’s Digital Marketing Powerhouse | Fast, Profitable Home Sales

Are you searching for a real estate agent who will make your home stand out and sell for maximum value—fast?

I’m Dawn Costello, a local expert who brings Fortune 500 marketing power to every listing in Sea Cliff, North Shore School District, Glen Cove, Roslyn, Locust Valley and the surrounding area. My 20+ years with brands like HGTV, AOL, and Food N...

Specialties
Buyer's AgentListing AgentRelocationForeclosureCommercial PropertiesFirst Time HomebuyersInvestment PropertiesRentalsLuxury Homes
8 Years of experience
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Dawn Costello's sales and listings (32)

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

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Sold (31)

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For sale (1)

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  • Listing by: Douglas Elliman Real Estate
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Dawn Costello's reviews (33)

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  • 5.0
    • 8/31/2026
    • • Pia Viana

    Sold a home in 2026.

    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 gratef...
    I cannot say enough wonderful things about **Dawn Costello at Douglas Elliman**\. She truly went above and beyond to successfully ...
    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!" ---...
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Dawn Costello

Douglas Elliman
5.033 reviews
5sales last 12 months
31total sales
$223K-$1.2Mprice range
$688Kaverage price
8years of experience
(917) 224-2442
dawn.costello@elliman.com
70 Forest Ave
Locust Valley, NY, 11560