Greater Portland Office Market Survey

Our 2024 Greater Portland Office Market Survey is now available. The Greater Portland office market is still adjusting to the post-pandemic world. Although the major headlines from primary markets are scary and fear-mongering, Southern Maine is not poised for as bumpy a ride as you might see on the news or read about in the… » Read more

Sam LeGeyt Joins Partnership

The Dunham Group is pleased to announce that broker Sam LeGeyt has been elected Partner of the firm. “Sam’s promotion to Partner not only reflects his impressive brokerage achievements but also his leadership and invaluable contributions to our firm,” shares Designated Broker and Partner Justin Lamontagne, CCIM, SIOR. “He is highly respected within the business… » Read more

2024 Southern Maine Industrial Market Survey

We are pleased to announce the release of our 2024 Southern Maine Industrial Market Survey. In this 13th edition of the Survey, we once again expanded its geographical area. The expanded report added seven new towns and cities growing the full inventory to 990 buildings and over 30,000,000 SF. With the increased scope, we can… » Read more

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Integrity. Reputation. Client-First Approach.

Our firm was built on a strong ethical foundation, and our collaborative approach allows brokers to pass industry wisdom from one generation to the next. Our commitment to communication and teamwork is how we do business and build lasting relationships with our clients.

5-building industrial portfolio sells for $14.6M in off-market deal

$14.55 million, 5-building portfolio sale: The buildings total 152,757 square feet on 12.58 acres and are fully leased to Beacon Building Products. TC Haffenreffer and Sylas Hatch brokered the transaction on behalf of the seller and Brandon Mitchell from Malone Commercial Brokers represented the buyer. Read the Mainebiz story here.

After three-year search, recovery center finds location to expand on outskirts of Portland

After a 3 year search with their broker Justin Lamontagne, Milestone Recovery found the perfect home for its expansion. Congrats Milestone Recovery on your recent purchase of 10 Andover Road in Portland! Milestone’s incredible work tackles two of Maine’s biggest challenges — the housing crisis and substance abuse. Read the full Mainebiz story here.

How to relocate your industrial business in a tight real estate market

The industrial real estate market continues to face historically low vacancy rates – currently at 1.91%. In this How-To article, our Designated Broker Justin Lamontagne shares his pro tips on navigating today’s industrial market. Read “How to relocate your industrial business in a tight real estate market” on

Southern Maine Industrial & Office Market Mid-Year Review

We are happy to share our Southern Maine Industrial & Office Market 2023 Mid-Year Review. This report is powered by the in-depth market knowledge of our team of brokers and their comprehensive internal database of commercial properties. The Mid-Year Review includes insightful analysis on the industrial market from Designated Broker and Partner Justin Lamontagne, CCIM, SIOR, and on the office… » Read more

How to move your commercial office space

We are experts in finding the perfect space for our clients…. but after moving into new space ourselves, we have even more insight to share! Check out this Mainebiz article “How to move your commercial office space” written by our Designated Broker, Justin Lamontagne, CCIM, SIOR. Read here on

We’ve Moved!!

It’s official! We moved into our brand new office space at 2 Monument Square, Suite 602. Stop in and say hi!

New Office, New Hires

Thanks to Mainebiz for a wonderful feature about our recent announcements (Read the story here!). After 20+ years at 10 Dana Street, The Dunham Group will be moving our offices to a beautifully upgraded space at 2 Monument Square in Portland this May. After years of strategic planning, a rebranding, and the recent hiring of… » Read more

Introducing Jim Harnden!

The Dunham Group is thrilled to announce that Jim Harnden has joined the firm as Broker and Partner. Jim comes to the Dunham team having over 35 years of experience in Maine’s commercial real estate market. Most recently, Jim has been President of Harnden Commercial Brokers. Jim’s focus and expertise is tenant representation, having worked… » Read more

Introducing Bryan Plourde!

We are thrilled to announce that Bryan Plourde has joined the firm as a new broker/Sales Agent. Having spent the last 10 years as a commercial real estate appraiser at Maine Valuation Company, Bryan brings an invaluable skill set to the firm. With a decade of experience appraising over $1 billion dollars and 5 million… » Read more