Call Now
Website
Call
Business Details
Trusted Commercial Real Estate Services in Portland, Maine
Dunham Group has been a leader in Maine's commercial real estate market for over 45 years. We specialize in providing in-depth market knowledge and trustworthy representation to help clients achieve their commercial real estate goals. Our collaborative approach combines local expertise with data-driven analysis to connect clients with the right opportunities. With a focus on ethical standards and client relationships, we offer tenant and landlord representation, buyer and seller representation, and consulting services. Our team of experienced brokers works across all property types, including office, retail, industrial, multi-family, land, and investment properties.

We are committed to delivering results-oriented brokerage and consulting services that prioritize client needs. Through strategic marketing and a vast network of industry connections, we ensure clients receive tailored solutions. Our dedication to excellence has built long-term partnerships and a reputation as Maine's commercial real estate specialists. From strategic planning to transaction management, we go the extra mile to ensure informed decisions. Our brokers are recognized for their expertise in specific sectors and have brokered many of Maine's most recognizable commercial properties.
Services
Tenant Representation Landlord Representation Buyer Representation Seller Representation Consulting & Valuations Industrial Real Estate Office & Retail Brokerage Investment Property Services Multi-Family Brokerage Land Development Consulting
Highlights and features
  • We have over 45 years of experience in Maine's commercial real estate market.
  • Our brokers specialize in specific sectors like office, retail, and industrial real estate.
  • We utilize data-driven analysis and collaborative strategies for optimal client outcomes.
  • Our team includes SIOR, CCIM, and ICSC-affiliated professionals with proven expertise.
  • We maintain long-term client partnerships through ethical standards and personalized service.
Associations and certifications
  • SIOR
  • CCIM
  • ICSC
Services
Tenant Representation
Dunham Group provides strategic tenant representation services, helping clients identify and secure optimal commercial properties. Our brokers conduct comprehensive market analyses and leverage extensive industry networks to connect tenants with spaces that align with their specific operational and financial goals. With a focus on long-term partnerships, we ensure clients receive transparent guidance from strategic planning through transaction completion.
Landlord Representation
Our landlords representation services combine local market expertise with a vast network of potential tenants to maximize property value. We develop tailored marketing strategies and leverage data-driven insights to attract qualified tenants, ensuring competitive positioning in the industrial, office, retail, and investment property sectors. Our team prioritizes transparent communication and cooperative brokerage practices for successful outcomes.
Consulting & Valuations
Dunham Group offers expert consulting and valuation services supported by in-depth market research and historical property data. Our brokers provide comprehensive investment analysis, property valuations, and strategic planning advice to help clients make informed decisions. With generations of collective experience, we deliver actionable insights aligned with current market conditions and long-term investment goals.
Industrial Real Estate
Specializing in industrial real estate, we represent over 85 combined years of expertise in southern Maine's market. Our team tracks inventory trends and lease rates to help clients optimize industrial property transactions. With deep connections to building owners, tenants, and economic development stakeholders, we deliver strategic solutions for warehouses, distribution centers, and manufacturing facilities.
Office & Retail Brokerage
As Maine's leading office and retail specialists, we leverage unparalleled market knowledge to facilitate successful transactions. Our brokers understand the nuances of these property types and maintain strong relationships with key industry players. From small businesses to large corporations, we provide tailored solutions for leasing, sales, and investment opportunities in southern Maine's commercial marketplace.
People
Thomas Dunham
Partner | Broker
With decades of experience, Thomas Dunham combines market expertise and ethical leadership as a partner and broker. He upholds the firm's founding principles of integrity and client-focused service.
Greg Hastings
Partner | Broker
SIOR-designated broker Greg Hastings specializes in industrial real estate with a proven track record of delivering strategic solutions for complex property transactions in Maine's commercial market.
Justin Lamontagne
Partner | Designated Broker
As Designated Broker since 2019, Justin Lamontagne brings CCIM and SIOR credentials to his role, combining analytical expertise with market specialization to serve commercial property clients effectively.
Sylas Hatch
Partner | Broker
Sylas Hatch leverages extensive market knowledge and client relationships to deliver successful outcomes for industrial, office, and retail properties, drawing on years of experience in Maine's commercial real estate sector.
Bryan J. Plourde
Associate Broker
MAI-certified associate broker Bryan J. Plourde combines valuation expertise with commercial brokerage services, providing clients with data-driven insights and strategic guidance for real estate investment decisions.
Questions
What commercial property types do you specialize in?
We specialize in office, retail, industrial, multi-family, land, and investment properties across Maine, with expert brokers focused on each specific sector.
How do you help tenants find commercial spaces?
Our tenant representation services include strategic planning, market analysis, and personalized guidance to help clients find and secure optimal commercial spaces aligned with their business needs.
Do you represent landlords in property leasing?
Yes, we offer comprehensive landlord representation services, utilizing strategic marketing and our extensive network to attract qualified tenants and maximize property value.
Are your brokers certified by professional organizations?
Many of our brokers hold prestigious designations like SIOR, CCIM, and MAI, demonstrating advanced expertise and commitment to professional standards in commercial real estate.
What areas in Maine do you cover?
We serve all major regions including Portland, Greater Portland, Lewiston/Auburn, Western Maine, Bangor Area, MidCoast Maine, and southern Maine communities.
Videos
Reviews (4)
Martin Duval
Nov 13, 2020 Report
Positive:Professionalism,Quality,Responsiveness
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.
Philip O'Connor
Aug 19, 2020 Report
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.
Win Dodge
Jul 25, 2020 Report
Positive:Professionalism,Responsiveness
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!
Scott Dobos
Jul 06, 2019 Report
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!