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Mark O'Brien

Mark O'Brien DevelopmentLead of Mark O'Brien
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Team

Recent Sales

Sales numbers represent all team members
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  • $1,825,000
    -- bd-- ba-- -- New York, NY
    -- bd-- ba-- --
    New York, NY
    Sold 11 days 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 4 months ago
    Buyer
    346 Halsey St, Brooklyn, NY, 11216
  • $2,365,000
    1 bd2 ba2,000 sqft Brooklyn, NY
    1 bd2 ba2,000 sqft
    Brooklyn, NY
    Sold 5 months ago
    Buyer
    587 10th St #1, Brooklyn, NY, 11215
  • $770,000
    3 bd2 ba0 sqft New York, NY
    3 bd2 ba0 sqft
    New York, NY
    Sold 6 months ago
    Buyer
    205 E 63rd St APT 7D, New York, NY, 10065
  • $1,775,000
    2 bd2 ba1,290 sqft Brooklyn, NY
    2 bd2 ba1,290 sqft
    Brooklyn, NY
    Sold 1 year ago
    Buyer
    128 Woodpoint Rd #3, Brooklyn, NY, 11211
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4
Sales last 12 months
88
Total sales
$270K-$2.5M
Price range
$1.2M
Average price

Get to know Mark O'Brien

Real Estate Agent

Specialties
Buyer's AgentListing AgentInvestment PropertiesNew Construction
36 Years of experience

Team listings & sales (89)

For Sale
For Rent
Sold
This map can show the most recent 100 listings and 100 sales. Review all listings and sales below.

For Sale (1)

Sold (88)

Address
Sold date
Closing price
Represented
Flag Sale
1/8/2026$1,825,000Buyer
9/18/2025$2,565,000Buyer
8/27/2025$2,365,000Buyer
7/10/2025$770,000Buyer
1/16/2025$1,775,000Buyer

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
    4sales last 12 months
    88total sales
    $270K-$2.5Mprice range
    $1.2Maverage price
    36years of experience