CircularBuild
Workers organizing reclaimed construction materials
Circular materials marketplace

Waste less. Share smarter. Help neighbors build with what you already have.

CircularBuild is a donation-first marketplace for homeowners, renters, and small crews to pass along surplus materials. Share what's left after a project, match it with neighbors or local rebuild teams in real time, and document the climate impact every donation creates.

82 lbsMaterials diverted
11Active users
3.5 daysAvg. pickup time
Marketplace preview

Explore donation-driven inventories across the network.

Preview a handful of active donations below. Sign in when you're ready to save listings, chat directly with nearby homeowners and community groups, and coordinate easy pickups.

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Stories from the field

Neighbors and community crews proving circular works at every scale.

Coordinated pickups, transparent chat threads, and impact-ready reporting keep reuse simple for households, block clubs, and project leads alike.

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Cities That Reuse America: New York City - Five Boroughs. One Rule. Reuse What Exists.

New York City is not one reuse story. It is five of them layered on top of one another, shaped by different building types, economic pressures, and histories, …

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Cities That Reuse America: Boston - A City With No Space to Waste

Boston is a city where reuse is woven into the street grid. Brick rowhouses line narrow corridors. Industrial buildings sit shoulder to shoulder with universit…

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Ready to keep materials in circulation?

Create an account to publish donations, receive real-time interest from neighbors, mutual-aid organizers, and DIY clubs, and share diversion data with your community.