Verified record
Mary Ellen Greenberg is a Cape Cod real estate agent based in Dennis, Massachusetts. Reviewers identify her as a Sotheby's International Realty agent representing buyers and sellers across the Cape's residential market, including waterfront and vacation-home transactions. Clients who have worked with her consistently describe fast, attentive communication and hands-on follow-through across the whole transaction. Reviewers describe her submitting an offer for buyers while she herself was on vacation, remembering personal details from an earlier conversation years later when a client returned to house-hunt, and walking first-time buyers through every step of a purchase. One couple completed two separate property purchases with her guidance within a two-year span. All seven Google reviews on file, dated across the first half of 2026, are five stars and describe specific completed sales or purchases rather than generic praise. Worth asking about before booking: a Massachusetts real estate broker license (9511661-RE-B) is active in the state registry, but it is filed under the name Mary Ellen Wilson — the same first and middle name as Mary Ellen Greenberg, but a different surname — so it could not be confirmed as this agent's own credential. Buyers and sellers should confirm her current licensing status directly with the state before relying on this record. She is a strong option for buyers or sellers on Cape Cod, particularly for waterfront and vacation-home transactions, based on a small but uniformly positive and detailed review history — though her license identity is worth double-checking given the registry name discrepancy.
Wow, too much to say, all positive was our experience with Sotheby’s real estate agent Mary Ellen Greenberg in coordinating the sale of our ocean front vacation home. Attention to detail, always going above and beyond,- from the minute details to the more complex, there was nothing that Ms. Greenberg couldn’t handle. To top it all off she was very down to earth, kind, and friendly. She thoroughly enjoys her work and gains great satisfaction in helping her clients in either selling or buying property on the Cape. If a need arises we would seek the services of Ms. Greenberg without hesitation. She is a real standout in her field and we recommend her without reservation.
My experience with Mary Ellen was amazing - more than I could have ever wished for. I met her online during covid as I was searching for a house, contemplating a move. She was responsive, helpful, and most importantly honest which guided me to make the best decisions in the moment. Fast forward to when I was really ready to make the leap, not only did she pick up the phone and remember everything about me... she enthusiastically started the hunt again! She is a well of information - which helped not only find a great house for my needs, but she acclimated me to the area, always has the person, or information on a place that may help me - for my home, life on the cape, and my overall sanity! Mary Ellen always kept me out of overwhelm all while also keeping me laughing and enjoying the process. To be honest, I can't wait to buy another home with Mary Ellen - hope she is up for adding new countries to her license! If you want to really celebrate your next move, enjoy the process, and meet a really great new friend - Mary Ellen is the person for you.
Working with Mary Ellen was a fantastic experience. She listens with patience to understand and then goes to work for you. Her market knowledge, warm personality, and that certain je ne sais quoi make her an absolute pleasure to work with. I’d highly recommend her to anyone buying or selling.
Mary Ellen is the best! Professional, knowledgeable and cares about her clients. She even submitted an offer for us while she was on vacation. She went above and beyond to get us into our new house. Highly recommend!
Mary Ellen knows her stuff. She loves Cape Cod and she loves what she does. She brings a balance of patience and persistence that lead to good results at the right time, for the right property. My wife and I have purchased two properties in the past 2 years with her guidance and partnership.
Specializes in
Also offers
Languages
1 change recorded — last scanned Aug 27, 2026.
20+ years of repeat client trust4.1
Deep sales expertise3.8
