Experience Matters ---- Experience the Difference!
Dianne began her real estate career in 1995 and has experience in most areas
of Cape Cod. She distinguished herself as a top producer in a very short time, achieving high producing revenue year after year. She is well respected in the community as well as her fellow Realtors. Dianne has a genuine interest in people and homes, she is focused on her clients' total satisfaction and takes great...
Bought a Single Family home in 2025 in Brewster, MA.
Dianne has all the characteristics of an outstanding real estate professional, including a deep market knowledge, the passion to find the property of your dreams, and th...
Dianne has all the characteristics of an outstanding real estate professional, including a deep market knowledge, the passion to ...
5.0
12/18/2025
• Danmcavoy1
Sold a Single Family home in 2025 in Harwich, MA.
I have worked with Diane in the past when I purchased my first home so it was a no brainer to seek out her knowledge and expertise once again. Working with Diane on the ...
I have worked with Diane in the past when I purchased my first home so it was a no brainer to seek out her knowledge and expertise...
5.0
12/1/2025
• cas2122
Bought a Single Family home in 2025 in North chatham, North chatham, MA.
Having an agent like Dianne when buying in the cape is a must! She knows everything about the towns, knows where the value is, is always reachable, and can be there when ...
Having an agent like Dianne when buying in the cape is a must! She knows everything about the towns, knows where the value is, is ...
5.0
5/12/2025
• carol sander
Sold a home in 2025.
Dianne brought energy, professionalism, and a wealth of real estate expertise to our very first meeting. Her depth of knowledge of the Cape market in general, and the lo...
Dianne brought energy, professionalism, and a wealth of real estate expertise to our very first meeting. Her depth of knowledge o...
5.0
1/28/2025
• user03713603
Sold a Condo home in 2024 in Harwich, MA.
I cannot recommend Dianne Mongeau highly enough! She recently helped me sell my condo in Harwich, MA, and the entire process was seamless from start to finish. Dianne’s d...
I cannot recommend Dianne Mongeau highly enough! She recently helped me sell my condo in Harwich, MA, and the entire process was s...
5.0
1/14/2025
• katiek 78
Sold a home in 2024.
Dianne did an excellent job with the sale of our house. Her knowledge of the area was essential in helping us determine a list price. The staging of the house was wonder...
Dianne did an excellent job with the sale of our house. Her knowledge of the area was essential in helping us determine a list pri...
5.0
12/7/2023
• cheryleckel
Bought a home in 2023.
Diane went above and beyond to find us the perfect home in the location that we wanted! She worked tirelessly on our behalf. Diane is very experienced and make sure every...
Diane went above and beyond to find us the perfect home in the location that we wanted! She worked tirelessly on our behalf. Diane...
5.0
1/5/2023
• kate c larson
Bought a home in 2022.
Dianne is an amazing real estate broker! We were completely unfamiliar with the real estate market on Cape Cod, and Dianne guided us through the pros and cons of various ...
Dianne is an amazing real estate broker! We were completely unfamiliar with the real estate market on Cape Cod, and Dianne guided ...
5.0
1/5/2023
• AmandaStark6
Bought a Single Family home in 2022 in Harwich port, MA.
Dianne was a pleasure to work with in the purchase of our primary home and one to renovate. Her knowledge of the the Cape Cod market is excellent.
Her response time, atte...
Dianne was a pleasure to work with in the purchase of our primary home and one to renovate. Her knowledge of the the Cape Cod mark...
5.0
9/29/2022
• cjd9129
Sold a Single Family home in 2022 in West harwich, MA.
Dianne Mongeau is the best! I called Dianne at Gibson Sotheby’s after reading some positive reviews and she came out to see our house on that same day which really impre...
Dianne Mongeau is the best! I called Dianne at Gibson Sotheby’s after reading some positive reviews and she came out to see our h...