Colleges and Universities
–  Amherst College
–  Colgate University
–  College of the Atlantic
–  Hampshire College
–  Mt. Holyoke College
–  Smith College
–  University of Massachusetts
–  Williams College

–  Beacon Communities
–  Boston Community Capital
–  Crotched Mountain Farm
–  The Harris Center
–  Hawthorne Valley Farm
–  Historic Deerfield
–  Housing Assistance Corporation
–  Lawrence Community Works
–  Olson Kundig Architects
–  Peabody Properties

–  Just Roots
–  Mass Audubon Society
–  The Natural Dharma Fellowship
–  Solidago Foundation
–  The Trustees of Reservations
–  Rocky Hill Cohousing
–  South Mountain Company

–  City of Northampton
–  Quabbin Regional School District


Structural Engineers
–  Barry Engineers & Constructors
–  GNCB Consulting Engineers
–  Novelli Engineering
–  Structures North
–  Whetstone Engineering

Mechanical, Electrical, and Plumbing Engineers
–  Arup
–  B2Q Associates
–  BVH Integrated Services
–  Hallam, ICS
–  LN Consulting
–  Petersen Engineering
–  VanZelm Engineers

Civil Engineers & Landscape Architects
–  Berkshire Design Group
–  Coplon Associates
–  Horsley Whitten Group

Energy/Performance Consultants
–  DEAP Energy Group
–  Energy Balance
–  Energysmiths
–  EnergyPower House
–  HB Fishman
–  New Ecology Inc.
–  PV Squared
–  Solar Design Associates


Acoustical Engineers
–  Accentech

Code Consultants
–  AKF Group

Lighting Consultants
–  Conceptual Lighting

Historic Consultants
–  MacRostie Historic Advisors

Interior Designers
–  Starr Interiors
–  Workroom Design Studio

Cost Estimators
–  Vermeulens

LEED Constultants
–  Sage Design

Geotech Consultants
–  Gifford Engineering
–  SW Cole

Project Management & Owners Rep Consultants
–  Bruss Project Management
–  CSL Consulting – owner rep


Aalanco Service Corporation
Allegrone Construction
Bebee Construction
Berkshire Photovoltaic Services
Celluspray Insulation
Daniel O’Connell’s Sons
Eckman Construction
EL Shea Builders and Engineers
Elm Electric
FCM Smart Build
Garland Mill Timberframes
Harry Grodsky & Co.
Heartwood Group
Holden Builders
Integrity Construction
Kent Hicks Construction

Keiter Builders
Landmark Structures
Milestone Engineering & Construction
MJ Moran
RL Whipple
Sano Rubin Construction
Scapes Builders & Excavation
Teagno Construction
Thayer Street Associates
The MacMillian Company
Two Storey Builders
Waterman Excavation
Western Builders
Whittier Heating and Plumbing
Wright Builders



The value of our collaboration with NESEA is evidenced by the broad network of professional colleagues that bring depth and joy to our practice. In fact, Bruce and Tom met through NESEA and this organization is at least in part responsible for the genesis of Coldham & Hartman Architects

American Institute of Architects (AIA)

Thomas RC Hartman is the New England representative of the AIA Strategic Council 2020, which advises the Board of Directors on the overall goals of the Institute.

New England Chapter of the AIA

The American Institute of Architects is a professional organization that fosters engagement within the building professions and between architects and the wider community. Thomas RC Hartman, principal at C&H is former president of the New England AIA.

Western Massachusetts Chapter of the AIA

The local chapter of the AIA hosts many enrichment and networking events for architects in the Pioneer Valley and surrounding communities. Garth is the chapter Treasurer and a member of the Executive Committee.

Passive House Institute US

Passive House is a rigorous performance standard for energy efficient building. The Passive House Institute US hosts an annual conference, provides certification for buildings and products, and training for professionals to become Certified Passive House Designers and Consultants.

Architecture 2030 & the AIA 2030 Commitment

C&H is a participating firm in the Architecture 2030 Challenge and signatory firm of the AIA’s 2030 Commitment. We submit documentation on the performance of our built projects to assist in the development of a rubric for green building best practices.

Carbon Leadership Forum

We have become members of the Carbon Leadership Forum with the goal of increasing our capacity and understanding of the importance of embodied carbon in our buildings. As we have decreased operational carbon, and as the clock ticks on atmospheric carbon, the analysis and understanding of design decisions and the resulting carbon impact (or drawdown) becomes critical.