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Mark O'Brien

Mark O'Brien DevelopmentLead of Mark O'Brien
5.016 team reviews
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Recent Sales

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  • $1,652,500
    2 bd2 ba1,066 sqft Long Island City, NY
    2 bd2 ba1,066 sqft
    Long Island City, NY
    Sold 3 months ago
    Buyer
    5-33 48th Ave #3A, Long Island City, NY, 11101
  • $1,695,000
    2 bd4 ba2,000 sqft Brooklyn, NY
    2 bd4 ba2,000 sqft
    Brooklyn, NY
    Sold 5 months ago
    Buyer
    33 Pilling St, Brooklyn, NY, 11207
  • $1,100,000
    1 bd1 ba0 sqft New York, NY
    1 bd1 ba0 sqft
    New York, NY
    Sold 6 months ago
    Seller
    150 Rivington St #2F, New York, NY, 10002
  • $1,858,306
    2 bd1 ba0 sqft New York, NY
    2 bd1 ba0 sqft
    New York, NY
    Sold 10 months ago
    Buyer
    25 Charles St APT 6A, New York, NY, 10014
  • $2,565,000
    5 bd3 ba2,280 sqft Brooklyn, NY
    5 bd3 ba2,280 sqft
    Brooklyn, NY
    Sold 1 year ago
    Buyer
    346 Halsey St, Brooklyn, NY, 11216
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4
Sales last 12 months
91
Total sales
$385K-$2.5M
Price range
$1.3M
Average price

Meet Mark O'Brien

Get to know Mark O'Brien

Real Estate Agent

Dynamic and well-rounded real estate veteran Mark O'Brien brings a keen eye for value and opportunity to each and every engagement, thanks to his strong background in residential property development, building and business. As a developer, a licensed New Home Builder and a licensed real estate professional, Mark has an enviable talent for finding the right location, at the right time and at the right price, resulting in record-breaking sales and ...

Specialties
Buyer's AgentListing AgentInvestment PropertiesNew Construction
36 Years of experience
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Team sales and listings (94)

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

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Sold (91)

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Team reviews (16)

Reviews represent all team members.

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  • 5.0
    • 2/1/2025
    • • njd0815

    Bought and sold a home in 2024.

    Review for: Mark O'Brien
    Mark and his team have helped me to both buy and sell properties. They are extremely knowledgeable and professional, and develop smart strategies to meet individual goals...
    Mark and his team have helped me to both buy and sell properties. They are extremely knowledgeable and professional, and develop s...
    5.0
    • 1/19/2025
    • • pmark37

    Bought a home in 2024.

    Review for: Mark O'Brien
    Mark O'Brien is an exceptional real estate broker who brings extensive experience and professionalism to the New York City real estate market. His deep knowledge of co-op...
    Mark O'Brien is an exceptional real estate broker who brings extensive experience and professionalism to the New York City real es...
  • 5.0
    • 1/17/2025
    • • zuser20180122170358869

    Bought a Condo home in 2024 in Soho, New york, NY.

    Review for: Mark O'Brien
    Mark was great to work with. He has deep knowledge and helped guide us in our purchase. He helped us consider the pro and cons of various aspects of each property we view...
    Mark was great to work with. He has deep knowledge and helped guide us in our purchase. He helped us consider the pro and cons of ...
    5.0
    • 10/27/2024
    • • mlangbert4

    Bought a home in 2024.

    Review for: Brian Worthman
    Brian did an outstanding job as a real estate agent. If you are looking to buy or sell a property in the city of New York, Brian is the best expert. Because he understand...
    Brian did an outstanding job as a real estate agent. If you are looking to buy or sell a property in the city of New York, Brian i...
  • 5.0
    • 5/31/2023
    • • allis815

    Found a tenant for a Apartment home in Gowanus, Brooklyn, NY.

    Review for: Brian Worthman
    Brian helped us find a replacement tenant to assign our lease when we needed to leave our apartment early. Extremely knowledgeable, responsive, and pleasant to work with....
    Brian helped us find a replacement tenant to assign our lease when we needed to leave our apartment early. Extremely knowledgeable...
    5.0
    • 10/5/2022
    • • KitMorrison8

    Bought a Condo home in 2022 in Upper east side, New york, NY.

    Review for: Mark O'Brien
    LOVED working with Mark and his team. Mark is very knowledgeable about real estate from condos to coops and everything in between. We enjoyed viewing apartments with him ...
    LOVED working with Mark and his team. Mark is very knowledgeable about real estate from condos to coops and everything in between....
  • 5.0
    • 6/29/2022
    • • pshep123

    Bought a Condo home in 2021 in Chelsea, New york, NY.

    Review for: Mark O'Brien
    I started working with Mark a few years ago and then for multiple reasons (including covid), stopped my search. When I started it up again last year, we picked up right ...
    I started working with Mark a few years ago and then for multiple reasons (including covid), stopped my search. When I started it...
    5.0
    • 11/24/2021
    • • Rachel Mariotti

    Bought a Condo home in 2021 in Chelsea, New york, NY.

    Review for: Mark O'Brien
    Mark is dedicated to you despite him being busy. He pays attention to detail and understand how to communicate the nuances of the buying process. Lucky to have found him ...
    Mark is dedicated to you despite him being busy. He pays attention to detail and understand how to communicate the nuances of the ...
  • 5.0
    • 11/23/2021
    • • zuser20160801123014915

    Bought a Condo home in 2020 in Sutton place, New york, NY.

    Review for: Mark O'Brien
    Mark goes over and above. Large or small deals he is a true professional, with lots of heart. He was most helpful in guiding us through a process unusual to one not from ...
    Mark goes over and above. Large or small deals he is a true professional, with lots of heart. He was most helpful in guiding us th...
    5.0
    • 5/4/2021
    • • zuser20150209125651722

    Bought a home in 2021.

    Review for: Mark O'Brien
    Mark is an incredibly competent yet relaxed real estate professional. He was both super responsive as well as patient -- two important qualities for a broker to have! And...
    Mark is an incredibly competent yet relaxed real estate professional. He was both super responsive as well as patient -- two impor...
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    TEAM

    Mark O'Brien

    Mark O'Brien DevelopmentLead of Mark O'Brien
    5.016 team reviews
    4sales last 12 months
    91total sales
    $385K-$2.5Mprice range
    $1.3Maverage price
    36years of experience
    (917) 485-4020
    mark@obteamnyc.com
    New York, NY
    New York, NY, 10009