What Briburn does

Briburn is a boutique architectural firm headquartered in Portland, Maine, founded in late 2012 by Christopher Briley and Harry W. Hepburn IV. The firm provides full-service architectural design—from schematic design through construction administration—for residential, commercial, and institutional clients seeking high-performance, sustainable buildings. Briburn specializes in the most stringent voluntary green building certifications, including Passive House (PHIUS+), Living Building Challenge, LEED, and WELL Building Standard, and has delivered several pioneering "firsts" including the nation's first Passive House high school (Maine Coast Waldorf School), Maine's first WELL-certified office (The Nature Conservancy in Maine), and Maine's first Living Building Challenge project (The Ecology School, $14.1M campus completed in 2021).

The firm's technical approach is grounded in iterative energy modeling used throughout the design process to balance envelope investment with operational savings. Its technology stack includes vapor-open Larsen truss wall assemblies with dense-packed cellulose insulation (achieving near R-60 wall performance), triple-glazed European-style windows, energy recovery ventilators, ground-source heat pumps, photovoltaic solar arrays, and blower door air-sealing testing, with documented ACH50 ratings of 0.25–0.85 and EUI values at or below the AIA 2030 baseline by more than 70%. Multiple projects are net-positive energy producers. The firm operates with a relationship-driven, sales-led go-to-market in which principals engage clients directly from initial consultation through long-term stewardship.

Briburn's revenue model is professional services fees on custom projects; the firm does not publish pricing, with project costs determined by scope, size, complexity, and certification requirements. Customers span individual residential homeowners (mid-market custom-home buyers across Maine communities including Portland, Falmouth, Cape Elizabeth, Brunswick, Freeport, and Ellsworth), commercial clients focused on the triple bottom line (TideSmart Global, 80 Exchange historic renovation, Marina Restaurant + Office), and institutional/educational clients (Maine Coast Waldorf School, The Ecology School, The Nature Conservancy in Maine). Distribution is entirely direct with no resellers or intermediaries, and project acquisition is driven by thought leadership content (multiple published books, the 'Green Architects' Lounge' podcast, conference speaking), earned media (Maine Home+Design, Fine Homebuilding, Dwell, HGTV Urban Oasis 2020), Houzz referrals (Best of Houzz Design/Service 2016–2021), and word-of-mouth within the Maine market.

Name

Briburn

Legal name

Briburn

Website

https://briburn.com

Company type

Private

Founded year

2012

Operating status

Operating

Headcount range

1–10 employees

Short description

Briburn is a Portland, Maine-based sustainable architectural firm founded in 2012, providing full-service design for residential, commercial, and institutional clients. The firm specializes in Passive House, Living Building Challenge, LEED, and WELL-certified high-performance buildings across the Northeast U.S.

Ownership category

akta.pro rank

Product category

Sustainable Architectural Services

NAICS

Architectural Services (54131), Architectural Services (541310)

akta.pro primary industry

Building Information Modeling (BIM) & Digital Design Services (BPAHAKAK)

akta.pro secondary industry

Residential Design-Build & Renovation-Integrated Builders (IMAFABAE)

Keywords

• Sustainable architecture services
• Passive house design
• Energy efficient buildings
• Green building consulting
• Architectural design services

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. Architectural Design Services: Full-service architectural design from concept through project completion. Services include schematic design, design development, construction documentation, and construction administration for residential, commercial, and institutional projects. The firm is engaged with clients 'every step of the way' and remains involved long after project completion.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels8 records

Core offering

Briburn is a Portland, Maine-based architectural firm providing sustainable, energy-efficient and "planet-positive" design services for residential, commercial, and institutional buildings. The firm delivers full-service architecture from concept through construction administration, applying Passive House, Living Building Challenge, LEED, and WELL building science principles supported by iterative energy modeling. Its work spans new construction, deep energy retrofits, historic renovations, and certification-driven projects across Maine and the Northeast U.S.

Product overview

Briburn is an award-winning architectural firm in Portland, Maine that offers sustainable architecture services for residential, commercial, and institutional projects. The firm practices 'Architecture for Life' - creating timeless, environmentally friendly, beautiful, and long-lasting buildings. Their service portfolio spans core architecture disciplines (Residential, Commercial, and Institutional Architecture Services) supported by specialized sustainable design approaches including Passive House Design, Living Building Challenge Projects, WELL Building Standard Certification, LEED Certification, Net Zero/Net Positive Design, and Deep Energy Retrofits. The firm has delivered notable firsts including Maine's first WELL certified office and the nation's first Passive House high school.

Differentiator

Problem solved

Functional benefit

Quantifiable outcome

• Ecology School achieved 0.0 EUI (net positive energy, generating more energy than consumed)
• +10 more outcomes

Named customers11 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

18 partnerships are on record, tiered minor and core.

• Wright-Ryan ConstructionminorImplementation/ SI/ Consulting Partner · 1 January 2024General contractor for the West End Garden House project in Portland, Maine (2024, 2,566 sq ft).
• Kaplan Thompson ArchitectscoreStrategic or Co-development Partner · 1 January 2021Kaplan Thompson Architects served as the principal architects and architects of record for the Ecology School Living Building Challenge project. Briburn was engaged as the design lead for the Dormitory building and energy modelers for the whole project. This 'Ecology of Architecture' team approach was designed to spread knowledge of Living Building Challenge across three firms at three times the rate.
• Simons ArchitectscoreStrategic or Co-development Partner · 1 January 2021Simons Architects served as the design lead for the Commons building of the Ecology School project as part of the collaborative 'Ecology of Architecture' team alongside Briburn and Kaplan Thompson Architects.
• Living Future InstitutecoreTechnology or Integration · 1 January 2021Briburn's Ecology School project was certified through the Living Building Challenge and Living Community Challenge programs administered by the Living Future Institute, making it Maine's first Living Building Challenge project.
• Richardson & Associates (Landscape)minorImplementation/ SI/ Consulting Partner · 1 January 2021Landscape architecture consultant for the Ecology School project.
• Becker | Thornton ThomassettiminorImplementation/ SI/ Consulting Partner · 1 January 2021Engineering consultant for the Ecology School project.
• Routledge / Taylor & Francis GroupminorOthers · 1 January 2020A Briburn team member contributed to the book 'Passive House Details: Solutions for High Performance Design' published by Routledge in 2017.
• Rainbow ConstructionminorImplementation/ SI/ Consulting Partner · 1 January 2019General contractor for the Urban Infill project in Portland, Maine (4-story net zero ready single family home, 3,350 sq ft).
• PHIUS (Passive House Institute US)coreTechnology or Integration · 1 January 2018Briburn projects are certified through PHIUS's Passive House certification programs. The firm has received multiple PHIUS awards including the 2018 Commercial Winner for Maine Coast Waldorf School and 2016 Residential Honor Award for Viridescent House. Christopher Briley is a Certified Passive House Consultant (CPHC) through PHIUS training.
• The Nature Conservancy in MainecoreStrategic or Co-development Partner · 1 January 2017Briburn designed a complete interior renovation for The Nature Conservancy in Maine's office in the historic Fort Andross Mill Business Center in Brunswick, achieving LEED Gold and WELL Building Standard Silver certifications — the first non-profit office in the Eastern U.S. to achieve WELL certification.
• WELL Building InstitutecoreTechnology or Integration · 1 January 2017Briburn's Nature Conservancy in Maine project was certified through the WELL Building Standard, making it the first office in northern New England and first non-profit space in the Eastern United States to achieve WELL certification.
• Warren Construction GroupminorImplementation/ SI/ Consulting Partner · 1 January 2017General contractor for The Nature Conservancy in Maine renovation project (WELL Gold / LEED Gold). Also served as general contractor for the 80 Exchange historic renovation and the Maine Coast Waldorf School addition.
• Revision EnergyminorImplementation/ SI/ Consulting Partner · 1 January 2016Solar energy consultant and installer for the Viridescent Passive House project (19.4 kW solar array). Also worked with Briburn on the Pemaquid Pond project (90-tube solar collector).
• Becker Structural EngineersminorImplementation/ SI/ Consulting Partner · 1 January 2016Structural engineering consultant appearing across multiple Briburn projects including Royal River Home + Studio, Maquoit Bay Residence, Munjoy Hill Modern, Marina Restaurant + Office, and Broad Cove Residence.
• Northeast Sustainable Energy Association (NESEA)minorOthersBriburn is a member of NESEA, a regional association supporting sustainable energy and green building. The firm is committed to meeting or exceeding the AIA 2030 Challenge and has signed the AIA materials pledge.
• U.S. Green Building Council (USGBC)coreTechnology or IntegrationBriburn is a member of the USGBC and is a founding board member of the Maine Chapter. The firm has completed multiple LEED certified projects and is committed to green building certification standards.
• PassivhausMAINEminorOthersChristopher Briley is a founding board member of PassivhausMAINE, a regional organization promoting Passive House building standards in Maine.
• American Institute of Architects (AIA)minorOthersBriburn has signed the AIA Materials Pledge and joined the AIA 2030 Commitment Program in 2019. Harry Hepburn serves as a committee member for Maine AIA's Committee for the Environment (COTE). The firm has won multiple AIA Maine design awards.

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Olson Kundig: Larger nationally recognized architecture firm with deep sustainability and high-performance residential and commercial work. Comparable on sustainability credentials and design philosophy, though broader in scale, geography, and project typology.
• Lake|Flato Architects: Texas-based nationally recognized firm known for sustainable, climate-responsive design across residential, commercial, and institutional projects. Comparable in sustainability leadership and design philosophy, but much larger in scale and geographic reach.

Direct peers

• ZeroEnergy Design: Northeast U.S. architecture firm specializing in Passive House, net-zero, and high-performance residential and light commercial design. Comparable to Briburn in building science methodology, certification focus, and custom residential orientation.
• BrightCommon: Maine-based architecture and design firm with a strong focus on sustainability, wellness, and biophilic design for residential and commercial clients. Comparable to Briburn in service mix, customer base, and regional focus.
• GO Logic: Maine-based firm that designs and builds Passive House and net-zero energy buildings, with a similar focus on high-performance residential and small commercial work. Closely comparable in target market, building science approach, and regional footprint.
• Simons Architects: Maine-based architecture firm with a strong sustainability practice; served as Commons design lead on the Ecology School project alongside Briburn and Kaplan Thompson. Comparable in size, geography, and high-performance building focus.
• Maclay Architects: Maine-based firm focused on sustainable residential and small commercial architecture, with deep expertise in energy-efficient design. Comparable to Briburn in market segment, regional presence, and sustainability positioning.
• Kaplan Thompson Architects: Maine-based architecture firm specializing in sustainable, energy-efficient residential and small commercial design. Partnered with Briburn as principal architects of record on the Ecology School Living Building Challenge project, making them the closest direct peer in size, region, and sustainability focus.
• buildLAB: Maine-based sustainable design-build firm focused on high-performance residential projects with Passive House expertise. Comparable to Briburn in target market and building science approach, though operating in a design-build model.

Others

• Northeast Sustainable Energy Association (NESEA): Regional industry association of which Briburn is a member; not a competitor but a peer convener for the high-performance building community in the Northeast. Relevant ecosystem participant rather than direct market peer.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/profile.php
• LinkedInlinkedin.com/company/briburn-architects

Compliance7 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 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 Briburn