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  4. Great Diamond Island

The best way to find top real estate agents in Great Diamond Island, Portland, ME

Skip the search. We analyze thousands of real estate agents in Portland’s Great Diamond Island neighborhood and nationwide to find you proven local pros, for free.

Real estate in Portland’s Great Diamond Island neighborhood.

Compare top Great Diamond Island real estate agents.

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Trusted by over 500,000 buyers and sellers.

See why so many people rely on Agent Pronto to make their real estate journey a success.

“Curt was a joy to work with. He was easy to communicate with and always operated with our best interests at heart. We are thankful for all that he did and said to us that aided us in getting across the finish line. The choice was easy; select Curt and rest easy.”

Mr. & Mrs. Johnson · Mansfield, TX

CA
Century 21 Judge Fite Company
“My realtor was amazing—knowledgeable, patient, and truly dedicated. Highly recommend!”

John K. · Raleigh, NC

Photo of Malissa Kastner
Century 21 Triangle Group
“Elisabeth was amazing! I would definitely recommend her to anyone! Thank you so much!”

Beverly Clement · Lompoc, CA

Photo of Elisabeth Braithwaite
Century 21 Masters
“Kristie's expertise and professionalism are great, but her outstanding virtue is how HARD she works to help you sell your home! From suggestions to incredible marketing, she shines way above the norm. Communication was excellent...I loved the weekly reports. Closing was quick and easy! I would definately use her again and have already referred a few people to her.”

Debbie · Mesa, AZ

Photo of Kristie Rodricks
RE/MAX Solutions
“Happy to be used as a reference... outstanding”

Ray Bednarcik · North Myrtle Beach, SC

Photo of Abe Safa
Century 21 The Harrelson Group
“We are so thankful for Brooke and her expertise as we were looking to buy a new house! She helped us find a house that was in our price range and in the style we wanted! She was able to meet us in a timely manner to look at any house when it came into the market! She walked us through buying a house beautifully! She was such an asset in this process. We could not imagine doing this without her!”

Jacob and Ashley · Mount Carmel, TN

Photo of Brooke Shelton
Century 21 Legacy
“Simply the best real estate agent experience I have had. Having purchased and sold 8 or 9 homes in the past, I believe this to be quite a compliment. I would recommend him for anyone needing anything in real estate.”

Jeff Stoutenburgh · Lexington, SC

Photo of Michael Matulis
Century 21 Century21 Vanguard
“Exceptional service, dedication, and heart I truly believe that if it had not been for Cory and his team, I would not have been able to complete this sale. The patience, professionalism, and compassion they showed throughout this entire process were absolutely extraordinary, especially during a very emotional and difficult time in my life. Cory and his team were always attentive, supportive, and incredibly understanding. They made every effort to guide me step by step, explain everything clearly, and ensure I felt safe and confident in every decision. Their empathy, dedication, and commitment to helping me were evident from beginning to end. They went above and beyond what is expected from a real estate team. I felt genuinely cared for, respected, and never alone in the process. I am deeply grateful for their hard work, integrity, and kindness. I highly recommend Cory and his team to anyone looking for truly exceptional real estate professionals who put their clients first.”

Mariela Garcia Alamo · Bismarck, ND

Photo of Address Team
Century 21 Morrison Realty
“Jodi took her time to meet with up. She was willing to have an open house and provide feedback. She was easy to communicate with and always returned calls quickly. She was open to suggestions and helped the sale of the house go smoothly.”

Connie Johnson · Long Beach, MS

JB
Busch Realty Group
“We love Katelyn! She goes above and beyond!”

Kandice Anderson · Greeneville, TN

Photo of Katelyn Warren
Castle & Associates Real Estate
“Being new to Cheyenne and new to home buying, I relied on Asha for every aspect of the purchase and for her knowledge of the neighborhoods we visited. She always returned calls and texts immediately and was always so friendly and gracious! She pointed out details of the homes that I had missed. And she's a hard worker!!”

Patti Thompson · Cheyenne, WY

Photo of Asha Bean
CENTURY 21 Bell Real Estate
“Fay did a fantastic job selling my parents house . She found buyers and it was sold quickly. Great knowledge of what to do . I would work with her again if opportunity arose.”

Brian Lampe · Winooski, VT

Photo of Faye Demestihas
Century 21 Scala Group
“Appreciated the patients concerning my expectations. Adysyn, Thanks very much.”

Jimmy Adkins · Fort Washington, MD

Photo of Adysyn Nikolic
Century 21- Action Realty
“Bill Hatton is the best Realtor! His knowledge and experience are by far an asset in the market today. He's flexible and super accommodating with his clients and goes above and beyond.”

Jenna Lavigne · Edmonton, AB

BH
RE/MAX Accord
“Very professional, very knowledgeable , it was a process with which he was very helpful in dealing with. Truly awesome, kind man. Thanks.”

Gary Westover · Marshall, TX

Photo of Mike Johnson
Coldwell Banker Lenhart Properties
“Valeria Amarante when above and beyond and exceeded my expectations. Would recommend to anyone. She is very attentive, patient, and understanding.”

Nelsida Espinal · Hartford, CT

Photo of Valeria Amarante
Century 21 Scala group
“We have bought 4 houses and this was the best experience we have ever had”

Carol Moody · Philadelphia, DE

Photo of Donielle  Haughton
Century 21 Gold Key Realty
“Jessica & Clayton made a our experience buying a new condo a stress free and exciting time with their knowledge and expertise. I highly recommend recommend them.”

Jean Parker · Saskatoon, SK

Photo of Clayton McNally
RE/MAX Saskatoon
“Maura was truly amazing! We had been struggling selling the property for two months before she came on. Once we switched to Maura, we got an offer in <24 hours!! She did an amazing job keeping calm and collected during an incredibly stressful time!”

Mara P. · Cincinnati, OH

Photo of The Cagney Family
Coldwell Banker
“Wow.. where do I begin. I'm not one to leave reviews but I know someone somewhere might need as this type of service could make or break someone if they don't find the right realtor. Kim is simply awesome. If you need a real negotiator, you got Kim. Kim's attention to detail, communication, and dedication is impeccable. I trusted Kim throughout the entire process and at the end I now consider Kim as family. We hit a snag in process with the appraisal and Kim was immediately on it, reaching out to anyone possible late into the night. Within a few days, we were good to go, Kim has a trusted team and they're all genuinely helpful and go above and beyond. There's no doubt in my mind who is leading me through the next purchase. Kim sells and will get it done right!”

Steve D. · Fredericksburg, VA

Photo of Kim Chamberlain
eXp Realty

Great Diamond Island real estate Market Report.

Information and statistics on the latest trends in the Great Diamond Island real estate market, updated for November 2025. *

The typical home value in Great Diamond Island is projected to be $732,500 for the month of November. October’s finalized data reported the typical value of a home in the neighborhood to be $726,000—up 15.01% over the previous 12 months. For comparison, city-level data pegged home values at $635,000 in Portland for the most recent reporting period. That number is expected to float around $620,000 in November.

Real estate in Portland’s Great Diamond Island neighborhood.
* Data provided by Redfin, a national real estate brokerage.

Learn more about what Great Diamond Island has to offer.

Great Diamond Island offers residents a unique blend of serene natural beauty and a close-knit community atmosphere, making it a charming place to live.

Great Diamond Island delivers an easygoing, coastal way of life just a quick ferry ride from Portland. Most residents get around by foot, bike, or golf cart, keeping streets quiet and the focus on sea breezes, wooded trails, and salty air. Daily connection to the mainland is simple via the year-round schedules of Casco Bay Lines, which makes commuting, errands, and evenings out seamless through its reliable service.

History and hospitality meet in the former military outpost at Diamond Cove, now home to the seasonal Inn at Diamond Cove set within beautifully restored brick buildings, and waterfront dining at Diamond’s Edge Restaurant & Marina, where moorings and marina slips make arriving by boat as appealing as arriving by foot. Boaters appreciate Great Diamond Marina for fuel, dockage, and quick access to Casco Bay’s islands and coves. Between beaches, tidepools, and leafy walking paths, outdoor time is a daily ritual.

Families are served by Portland Public Schools, with students attending mainland schools within the district and benefitting from diverse academic and extracurricular options. City services, including public safety and island-specific support, are coordinated through the City of Portland’s islands programs, adding confidence to year-round and seasonal living alike.

If life on Great Diamond Island is calling, Agent Pronto can help buyers and sellers connect with a knowledgeable local real estate professional to navigate this unique market with ease.

Frequently Asked Questions

There are more than 2 million real estate agents across the U.S., and you want to be sure the one you partner with is an experienced and trustworthy professional with strong local expertise covering the housing market in and around Great Diamond Island. Working with a proven agent will help you sell your home faster and for more money, and help you find your dream home at the best possible price.