What The Dunham Group does

The Dunham Group is a privately held commercial real estate brokerage firm headquartered at 2 Monument Square in downtown Portland, Maine. Founded in 1980 (45+ years operating), the firm provides buyer, seller, landlord, and tenant representation across all major commercial property types—office, retail, industrial, multi-family, land, investment, medical, and special-purpose—serving enterprise clients such as IDEXX Laboratories, Sun Life Financial, Consolidated Communications, Sappi, and Stantec alongside regional and SMB customers throughout Maine. It operates as NAI The Dunham Group, an affiliated office of NAI Global, the world's largest commercial real estate brokerage network.

The firm's service model is delivered by a specialized team of approximately 15 brokers organized into an Industrial Team and an Office/Retail & Investment Team, with a high concentration of senior industry designations (SIOR, CCIM, MAI). The core technology surface area is conventional: a self-service property listings portal with search-by-type/location/size, broker contact workflows, and CRM-style email/newsletter distribution. Differentiated assets include two proprietary longitudinal research products—the annual Southern Maine Industrial Market Survey (now in its 15th year) and the Greater Portland Office Market Survey—which double as top-of-funnel brand assets. Website analytics run on Microsoft Clarity; no proprietary AI/ML, app, or API platform is operated.

Revenue is generated entirely on a transaction-fee basis: commissions on commercial property sales and leases, with lease rates across the portfolio ranging from $4.00 to $38.00+ per SF NNN and sale prices from $250,000 to $23.5 million. Lead generation combines relationship-driven broker outreach, a self-serve listings site, the annual market surveys, and content/earned-media coverage (e.g., Mainebiz) on marquee deals. Distribution is regional—Maine, with broker-level access to national/international deal flow through NAI Global. Marketing channels span organic social (LinkedIn, Facebook, Instagram), email newsletters, the listings platform, and PR around high-profile transactions such as the $23.5M office sale in April 2026 (the largest Maine office transaction YTD). The firm holds no identified external funding, parent company, or institutional ownership; equity and decision-making sit with its founding and partner brokers (Justin Lamontagne, Jim Harnden, Sam LeGeyt).

Name

The Dunham Group

Legal name

The Dunham Group

Website

https://dunham-group.com

Company type

Private

Founded year

1980

Operating status

Operating

Headcount range

11–50 employees

Short description

The Dunham Group is a Portland, Maine-based commercial real estate brokerage firm that provides buyer, seller, landlord, and tenant representation across office, retail, industrial, multi-family, and investment property types for enterprise, mid-market, and SMB clients across Maine, operating through a 15-broker team as NAI The Dunham Group.

Ownership category

akta.pro rank

Headquarters

HQ city

Portland

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Commercial Real Estate Brokerage: Traditional brokerage commissions on commercial property sales and leases. The firm represents buyers, sellers, landlords, and tenants across all commercial property types in Maine. Revenue generated through transaction fees based on property sale prices or lease values.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

The Dunham Group is a commercial real estate brokerage firm representing buyers, sellers, landlords, and tenants across Maine in office, retail, industrial, multi-family, land, and investment property transactions. Revenue is earned through transaction-based commissions on sales and leases, supported by a property listings platform, proprietary annual market surveys (Industrial and Office), and a team of brokers holding SIOR, CCIM, and MAI designations.

Product overview

The Dunham Group is a Maine-based commercial real estate brokerage firm operating as a single unified service offering. Their portfolio consists of brokerage services for commercial properties (office, retail, industrial, multi-family, land, and investment), supported by a property listings platform on their website and periodic market research publications (Industrial and Office surveys). The firm organizes brokers into specialized teams—Industrial Team and Office/Retail & Investment Team—for focused sector expertise.

Differentiator

Problem solved

Functional benefit

Products and services

• Commercial Real Estate Brokerage Services
• Property Listings Platform
• Annual Market Surveys (Southern Maine Industrial & Greater Portland Office)

Named customers10 records

Segments8 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

AI capability1 record

Feature1 record

Partnerships

Two partnerships are on record, tiered minor and core.

• MainebizminorGTM or Marketing Partner · 14 April 2026Local Maine business news coverage of The Dunham Group's $23.5M office sale transaction, providing press exposure and credibility in the Maine business community.
• NAI GlobalcoreChannel Partner/ Reseller/ DistributorThe Dunham Group operates as NAI The Dunham Group, an affiliated office of NAI Global - one of the largest commercial real estate brokerage networks globally. This affiliation provides access to national and international property listings, investors, and corporate clients.

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• Colliers International: Global commercial real estate services and investment management firm with full-service brokerage across the U.S. and internationally. Broad incumbent competitor for office and industrial mandates.
• CBRE Group: Largest global commercial real estate services firm offering brokerage, valuation, and advisory across all property types and geographies. Competes with The Dunham Group on larger enterprise mandates and investment sales in Maine.
• Cushman & Wakefield: Global commercial real estate services firm offering brokerage, valuation, and advisory. A broad incumbent that competes with The Dunham Group for enterprise tenant representation and institutional investment sales mandates.
• JLL: Global real estate services firm with full-service brokerage, capital markets, and advisory capabilities. A broad incumbent competing for the same enterprise tenants and investment sales the Dunham Group serves in Maine.
• Avison Young: Global commercial real estate services firm offering brokerage, property management, and advisory. Broad incumbent that competes in mid-market CRE transactions and tenant representation services.
• Newmark Group: Global commercial real estate advisory and services firm (which acquired Boulos Company). Competes with The Dunham Group on enterprise tenant representation in Maine via its national platform.

Direct peers

• The Boulos Company: Long-standing Maine commercial real estate firm providing brokerage, property management, and development services across Portland and Northern New England. Closely comparable in market geography and full-service CRE brokerage offering.
• Malone Commercial Brokers: Portland, Maine-based commercial real estate brokerage offering sales, leasing, and tenant/landlord representation across Southern Maine. Directly comparable in geographic focus and core service offering.
• Cardente Real Estate: Maine-based commercial real estate brokerage firm where Dunham Group's recently recruited broker Greg Perry previously spent 16 years as a partner. Directly comparable in market focus (Southern Maine CRE), service mix (brokerage and tenant/landlord representation), and team size.

Emerging players

• Marcus & Millichap: Investment real estate brokerage specializing in commercial investment property sales across the U.S. Comparable to The Dunham Group's investment sales practice (e.g., the $23.5M office sale in 2026) but operating at national scale with an investment-property focus.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/watch?v=e7SvITIxCyk
• Facebookfacebook.com/TheDunhamGroupCRE
• LinkedInlinkedin.com/company/the-dunham-group
• Instagraminstagram.com/thedunhamgroup

Revenue estimate

Valuation estimate

Number of profiles

Profiles15 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about The Dunham Group