Washington Mass Timber Accelerator

Building a stronger, more resilient future, together.

University of Washington Foster School of Business. Design by LMN.

Washington Mass Timber Accelerator

Building a stronger, more resilient future, together.

Green Canopy NODE. Prefabricated Housing

Washington Mass Timber Accelerator

Building a stronger, more resilient future, together.

Greenville Micro Housing. Design by Atelierjones

WA Mass Timber Accelerator (MASSTAC) is sustainably and equitably accelerating the adoption of mass timber in construction, in Washington, and nationally.

What is Mass Timber?

Mass timber is, at once, a material, a system of building, and a new paradigm for construction that is climate sustainable, beautiful, and efficient.

Washington is ready to advance the use of mass timber in construction. Mass timber can be used for everything from multifamily housing to civic buildings, office and industrial buildings, and more.

The Bush School New Upper School. Design by Mithun. Photos by Lara Swimmer.
The Bush School New Upper School. Design by Mithun. Photo by Lara Swimmer/Esto.

Resources & Events

How to Mass Timber

Mass Timber Schools: Case Studies

MASSTAC (Erica Spiritos, Sofia Chavez)

Developed with the Mass Timber Schools Committee, this book features a selection of mass timber schools in construction and in design throughout the Pacific Northwest.

Learn More

Save the Date

Tue
31
Mar

March 31, 2026

International Mass Timber Conference

Event Details & RSVP
Get Involved

Pledge your support for Mass Timber

Pledge your commitment to sustainably and equitably accelerating the adoption of mass timber in construction, in Washington and nationally. You can also add your name to our distribution list to be notified of newly published resources, events, and announcements.

Washington School for the Deaf. Design by Mithun. Photo by Lara Swimmer/Esto.

Thank you to our Funding Partners

Coughlin Porter Lundeen
PCS Structural Solutions
Port Blakely
Swinerton
StructureCraft
Timberlab
PNW Ironworkers District Council
Holmes US
Perkins&Will
Seattle Office of Economic Development
Craft Contracting
Washington State Department of Commerce

Lead Washington & the Pacific Northwest Toward a Timber-Based Future

Our region has always been defined by its forests, waterways, and ingenuity. Today, we have a chance to lead the nation in reimagining how we build—with mass timber, a material that honors our region’s natural resources while advancing climate-smart innovation. By supporting MASSTAC, you help position Washington, the PNW, and the U.S. as global leaders in sustainable construction.

Invest In Us