Dawn Costello

Branch Real Estate Group

7 Years of Experience

(28)

$4M

Total Sales Last Year

Years of Experience

Recent TransactionsTransactions from the last 3 years

$772.3K

Average Price Point

Service Areas

Sea Cliff, NY

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About Dawn Costello

After spending 12 years at HGTV I took my passion for all things home to realize my dream of becoming a real estate agent. I'm also a property investor and have managed properties for the last 15 years. What makes me stand apart from the rest? Other than having dined with the Property Brothers? I KNOW how to market homes. For Buyers, I can help you ask the right questions and with my background in design/home improvement, I can offer suggestions on how to add your personal style to a home. For Sellers, I have over 25 years of experience in marketing and can get your home in front of the right buyers to sell it quickly. I'm a skilled negotiator who has managed multi-million deals with finesse. My aim is to help my clients buy or sell their home and happily move on to a new phase of life.

Specialties

Sellers
Residential Property
Commercial Property

Awards

2025
TOP AGENT
Sea Cliff, NY

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Dawn Costello's Reviews & Ratings

28 Reviews

(5/5)

Note: Reviews may include other agents on their team

What clients say about this agent....

Responsive
Professional
Communicative
Knowledgeable
Attentive
Outstanding
Hard working
Trustworthy

Erin C.

Review for Member: Dawn Costello

August 11, 2025

Local Knowledge

Process Expertise

Responsiveness

Negotiation skills

ZillowVERIFIED

Dawn is simply the best! Shes been with us through every stageaEUR"helping us find the perfect rental, guiding us through buying our first home, and then selling it for a fantastic return. She masterfully handled the big pictureaEUR"timelines, professional photos, strategic planningaEUR"while also perfecting every detail, right down to making sure the plants inside and out looked amazing for photos and open houses. Dawn truly is a one-stop-shop for all your real estate needs. If she cant do it, it cant be done!

Don M.

Review for Member: Dawn Costello

August 8, 2025

Local Knowledge

Process Expertise

Responsiveness

Negotiation skills

ZillowVERIFIED

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 stress-free. Dawn is always available and ready to help, she truly care about her clients. I highly recommend Dawn to anyone looking for a dedicated and reliable real estate agent.

Taylor C.

Review for Member: Dawn Costello

June 19, 2025

Local Knowledge

Process Expertise

Responsiveness

Negotiation skills

ZillowVERIFIED

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 area and feel comfortable. Would 10/10 recommend her to a friend or loved one!

Frank L.

Review for Member: Dawn Costello

January 20, 2025

Local Knowledge

Process Expertise

Responsiveness

Negotiation skills

ZillowVERIFIED

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 our property. She was in constant contact with us and showed the apartment to numerous prospects. In a relatively short period of time a great match was made. When were ready to rent, sell, or buy in future well be calling Dawn. Thank you!

Bbokovsky

Review for Member: Dawn Costello

June 14, 2024

Local Knowledge

Process Expertise

Responsiveness

Negotiation skills

ZillowVERIFIED

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 recommended her. Down found for my in-law a beautiful house in Long Island. ----How Dawn is working She is great. Dawn does not count time, always available, quick responder. Active but not pushy. Energetic but delicate. Positive, intelligent and nice. Dawn goes beyond her responsibilities when is helping you. You will be in a good hand!