Business Details
46 Years
experience
Your Trusted Commercial Real Estate Partner in Maine
At Dunham Group, we combine over 45 years of commercial real estate expertise with a collaborative, client-first approach to deliver exceptional results. Founded on a foundation of ethical standards and market specialization, our team of brokers brings deep local knowledge and data-driven insights to every transaction. We prioritize long-term relationships by listening to client needs, conducting thorough research, and leveraging our extensive network across Maine's commercial real estate landscape. Our brokers specialize in office, retail, industrial, multi-family, land, and investment properties, with additional expertise in dental, medical, and special-purpose properties.Recognized for our SIOR, CCIM, and MAI designations, we maintain affiliations with leading industry organizations to ensure access to the latest market intelligence. Through in-house marketing, strategic consulting, and a commitment to innovation, we help clients achieve their real estate objectives while contributing positively to Maine's communities. Our success stems from combining generational wisdom with modern analytics to create value-driven partnerships that extend beyond single transactions.
Services
Office Brokerage
Retail Properties
Industrial Real Estate
Multi-Family Investments
Land Development
Investment Sales
Tenant Representation
Landlord Services
Property Consulting
Market Analysis
Details
- Year established: 1980
Highlights and features
- 45+ years of specialized commercial real estate experience in Maine
- Collaborative team approach with data-driven market analysis
- SIOR, CCIM, and MAI designations demonstrating industry expertise
- Local market specialists covering all property types statewide
- Ethical foundation with long-term client relationships since 1980
Associations and certifications
- SIOR
- CCIM Institute
- MAI
What people say
Market knowledge
Collaborative approach
Successful outcomes
Personalized service
Data-driven insights
Services
Industrial Real Estate
Our industrial real estate specialists provide comprehensive brokerage services for warehouse, distribution, and manufacturing properties. With over 85 years of combined experience in Maine's industrial market, we represent both property owners and tenants in strategic leasing and sales transactions. Our team tracks market trends and maintains relationships with key industry players to deliver optimal solutions for clients seeking industrial space.
Office Property Brokerage
We offer expert representation for office property transactions across southern Maine. Our specialists leverage deep market knowledge and first-hand building insights to connect clients with suitable office spaces. From small professional offices to large corporate headquarters, we provide tailored solutions for tenants, landlords, and investors in Maine's evolving office market.
Retail Property Services
Our retail property experts handle investment sales and leasing for commercial retail spaces throughout Maine. With proven expertise in retail market dynamics, we help clients maximize property value through strategic positioning and targeted marketing. We represent both national retailers and local business owners in finding optimal retail locations.
Multi-Family Investments
We specialize in multi-family property transactions, connecting investors with income-generating apartment complexes and mixed-use developments. Our team provides comprehensive market analysis, valuation services, and negotiation expertise to ensure successful outcomes for buyers, sellers, and investors in Maine's multi-family market.
Land Development
Our land development specialists assist clients with acquisition and disposition of vacant land for residential, commercial, and industrial development. We offer expert guidance on zoning regulations, land use potential, and development opportunities across Maine, working with builders, developers, and investors to maximize land value.
People
Thomas Dunham
Partner | Broker
Founder of Dunham Group with over 45 years of commercial real estate experience in Maine. Established the firm's ethical foundation and collaborative approach that continues to guide our brokerage services today.
Justin Lamontagne
Partner | Designated Broker
CCIM and SIOR-designated broker leading the firm's industrial real estate practice. Brings specialized expertise in logistics and distribution properties across southern Maine with a focus on strategic client representation.
Bryan J. Plourde
Associate Broker
MAI-designated appraiser with extensive valuation expertise. Provides comprehensive real estate consulting services and market analysis for commercial properties across multiple asset classes in Maine.
Greg Hastings
Partner | Broker
SIOR-certified broker specializing in industrial and office properties. Contributes decades of experience in Maine's commercial real estate market with a focus on strategic property representation.
Sylas Hatch
Partner | Broker
Experienced commercial real estate broker representing clients in industrial, retail, and investment property transactions. Combines market knowledge with analytical skills to deliver data-driven solutions for property owners and investors.
Questions
What commercial real estate services do you offer in Maine?
We provide comprehensive brokerage services for office, retail, industrial, multi-family, land, and investment properties across Maine, including tenant representation, landlord services, and market consulting.
How does your collaborative approach benefit clients?
Our team shares market intelligence and resources to provide comprehensive solutions, ensuring clients benefit from collective expertise in their specific property type and geographic area.
What areas in Maine do you cover?
We serve all of Maine with particular expertise in Portland, Lewiston/Auburn, Bangor, Biddeford/Saco, and MidCoast regions, handling transactions statewide.
What makes your industrial real estate team unique?
Our industrial specialists have over 85 years combined experience and represent most available industrial space in southern Maine, providing unmatched market insights for clients.
How do you market commercial properties?
We use targeted marketing plans with professional photography, digital listings on major platforms, local publications, and direct outreach to brokers and economic development contacts.
What credentials do your brokers hold?
Our team includes SIOR, CCIM, and MAI designations, representing the highest industry standards of expertise and ethical practice in commercial real estate.
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Reviews (4)
Martin Duval
Mar 11, 2021
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We've worked with NAI The Dunham Group on sales and leasing throughout greater Portland. The brokers at The Dunham Group are very knowledgeable and professional. TC Haffenreffer and Sylas Hatch are experts in the market.
Win Dodge
Jan 10, 2021
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Have bought properties and leased properties using NAI Dunham Group. TC Heffenreffer has always done a great job for me. Very responsive and in tune with the market!
Philip O'Connor
Aug 19, 2020
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I had commercial property in Lewiston that I wanted to list and unfortunately it was during the height of Covid. I was doubtful I would have many viewings or offers. Sam LeGeyt diligently found legitimate buyers within a short period of time and had several offers on the table quickly. Sam has great communication skills and has your best interest in mind and I would strongly recommend him.
Scott Dobos
May 09, 2020
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The Dunham Group in Portland has helped a non-profit I have worked with relocate and secure new space in South Portland. They were incredibly happy with the professionalism and expertise they received working with a top notch Commercial real estate firm in Portland. Thank you Dunham Group!
