Construction & demolition waste in the U.S. each year
600M tons
U.S. EPA, 2023
Our mission
We connect construction surplus with the people and projects who need it most.
CircularBuild is the world’s first donation-based raw materials reuse marketplace. We keep excess framing lumber, metals, fixtures, and even light machinery in motion by linking generous donors with homeowners, educators, and nonprofit teams delivering human-centered infrastructure.
In a world battling climate change, rising resource scarcity, and a disconnect between projects, CircularBuild invites everyone to connect the circle.
From local job sites to overseas humanitarian work, our team has seen how a reliable pallet of materials can launch community resilience projects. CircularBuild makes sure those materials never go to waste again.
Reuse saves budget & carbon
Most common materials wasted
- • Dimensional lumber and engineered wood
- • Structural steel and aluminum stock
- • Finish fixtures: tile, flooring, cabinetry
Avg. project waste from over-ordering
10-15%
McKinsey Construction Productivity Report
Communities CircularBuild prioritizes
Nonprofits, schools, homeowners
Platform focus
Materials we keep in circulation
Explore the categories donors move most through CircularBuild.
Tap a category to reveal how we redirect surplus into the hands of nonprofits, students, and homeowners tackling mission-critical builds.
Dimensional lumber, sheathing, and trim make up 40% of residential waste. Match offcuts with community crews instead of paying tipping fees.
Steel and aluminum offcuts carry heavy embodied carbon. Reuse avoids smelting emissions and keeps local fabrication on schedule.
Tile, windows, flooring, and cabinetry stretch nonprofit budgets and reduce trips to salvage yards.
Built from the field up
Matthew Cooper launched CircularBuild after half a decade of navigating construction management and civil engineering roles where end-of-project surplus was routine. Factors of safety are built into a project’s budget, but in many cases this emergency supply is never tapped. The result? Pallets of engineered lumber, steel, and workable fixtures discarded because matching them with the right recipient was too complicated.
Service-inspired mission
Work on a design partnership with a Malawi refugee camp and experiences with Engineers Without Borders highlighted how transformative access to basic materials can be. High school and college clubs, nonprofit organizations, and even capstone projects often have little to no budget but urgently need safe, reliable materials without the price tag of virgin sourcing.
An innovative solution to a growing problem
CircularBuild bridges donors with high-quality leftovers and recipients who can turn them into resilient housing, community facilities, and learning labs. The platform manages intake, verification, location-aware search, and direct messaging so swaps stay simple and transparent—whether you’re a student in a design-build club, a social infrastructure organization, or a homeowner tackling a repair. Contractors and neighbors with leftover materials destined for landfill can join us in creating a more sustainable, efficient development industry worldwide.
Our north star
Every donation keeps materials in circulation, reduces embodied carbon, and empowers innovators who are building better places to live. CircularBuild is the bridge that makes both giving and receiving effortless.
Keep materials moving
We make reuse the default option by pairing surplus structural lumber, metals, and fixtures with builders who can deploy them immediately.
Serve community-led projects
Grassroots organizations, student engineering clubs, and households tackling critical repairs deserve the same access to quality materials as large contractors.
A win-win for both sides
Our product is built with an understanding of the benefits of donating—from avoiding landfill fees to hitting diversion targets to simply being a good neighbor.
CircularBuild operates as a mission-driven nonprofit. We measure success by the tonnage redirected from landfills and the projects made possible in classrooms, workshops, and communities worldwide.
How reuse delivers value
Tap to see why donors and builders rely on CircularBuild.
- Cut tipping fees: Listing high-value materials is free and keeps resources in circulation.
- Keep crews moving: Builders can source nearby stock versus waiting on volatile supply chains.
- Empower community impact:Makerspaces, schools, and humanitarian teams gain transparent inventory.
- List surplus: Add photos, availability, and pickup notes.
- Search smarter: Filter specs or switch to map view to scout opportunities.
- Coordinate: Chat in-app, confirm transfers, and track landfill diversion.
Ready to partner with us?
Whether you have a jobsite full of extras or you’re equipping a service project, CircularBuild brings everyone to the same table. List materials, discover donations, and share impact metrics with your stakeholders.