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Your Elevated
Real Estate Experience
Mary O'Hagan Sotheby’s International Realty is your trusted partner for buying and selling homes in Greater Boston and surrounding communities.
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Meet Mary O'Hagan


I believe that buying and selling real estate should be seamless and stress-free. With my Signature Concierge Experience, I ensure all the details of your real estate investment are handled efficiently so you can rest easy knowing that you’re taken care of from start to finish.

- Mary

what our clients are saying

“When we engaged Mary as our agent we already had already seen the home we wanted to purchase at an open house. However as anyone who has purchased a home will know, selecting a home is only the first step in a complex process with many potential pitfalls. Mary and the team have put in place a comprehensive process with specialists at each step to ensure you move through this process with the minimum of stress. They bring an excellent network of home inspectors and other specialists to provide expert advice. With Mary’s help we were able to make a successful offer, work through the complete process (including a few of the additional complications which always come with the territory) and close on our new home in time to move in a few days before Christmas. Mary’s positive and upbeat approach was immensely helpful throughout the entire process.“


“Mary and her operations manager make a great team and I'm very grateful for all of their help to make this sale happen!“


“Mary is always on top of things and I have to say her attention to detail, follow up, and constant communication has been phenomenal. She really has helped Niki and I understand and know what's going on. We can't thank you enough for that and I wanted to make sure I let you know. Thank you very much!“

Casey and Niki

“We recently had the pleasure of working with Mary for our family's real estate needs. Throughout, Mary displayed the utmost professionalism, dedication, and expertise. She possesses a deep knowledge of the market and always prioritized our needs, ensuring that we made the best decisions for our situation. Her responsiveness and attention to detail made the entire process smooth and stress-free. Whether you're buying or selling, I highly recommend Mary. She's not just an agent, but a trusted advisor throughout the entire journey!“


“Mary was thorough and knowledgeable. She helped us prepare our home for sale and made sure we had the resources we needed. We look forward to using her as a buyer’s agent next!“


“Thank you Mary for your professional guidance. I am so not in the know regarding the business of purchasing property, so many facets, to say the least. Mary and her team have impressed me so much with their knowledge and ability to manage so many balls in the air. And I am thankful, you have been so helpful on so many levels.“


“Mary, thank you so much for all of your help with both our sale and purchase of a new home. We couldn’t have asked for a better realtor to work with!! Thanks again.“

Mary, Brian, and Matt

“You and your team were outstanding throughout the whole process. We can’t thank you enough for making a stressful time as easy as it possibly could have been.“

Larry and Stephanie

“We have really enjoyed working with you to find our house and appreciate all the time and effort you took on not only showing us lots of houses and the towns around here but also all of the extra time that went into the sale of the house. Thank you!“

Sara, Will, Jack, and Lily

“Thank you seems a little inadequate but we sure hope you know how much your assistance and company have meant to us. We couldn’t have done it without you!!“

Jodie, Chris, and Ava
we give back

Philanthropy is a cornerstone of my business. It is with gratitude that I give back to my community!


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