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.

Reclaimed lumber bundle

Reclaimed lumber bundle

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Donation
Wood

Availability shared after sign in

Wood (dimensional lumber)1,800 lbs • 1071.0 kg CO₂e

Total ≈ 1,800 lbs • 1071.0 kg CO₂e

Steel beams, assorted

Steel beams, assorted

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Donation
Steel

Availability shared after sign in

Steel (structural, generic carbon)2,400 lbs • 2028.0 kg CO₂e

Total ≈ 2,400 lbs • 2028.0 kg CO₂e

Fixtures & lighting lot

Fixtures & lighting lot

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Donation
Fixtures

Availability shared after sign in

Plastic PET (#1)600 lbs • 654.0 kg CO₂e

Total ≈ 600 lbs • 654.0 kg CO₂e

Composite decking surplus

Composite decking surplus

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Donation
Decking

Availability shared after sign in

Plastic PVC (#3)950 lbs • 926.3 kg CO₂e

Total ≈ 950 lbs • 926.3 kg CO₂e

HVAC equipment bundle

HVAC equipment bundle

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Donation
Mechanical

Availability shared after sign in

Steel (structural, generic carbon)1,200 lbs • 1014.0 kg CO₂e

Total ≈ 1,200 lbs • 1014.0 kg CO₂e

See more available materials
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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The Hidden Inventory Inside Every Renovation

At 7:12 a.m., a crew starts peeling back the skin of a Midtown office floor. Ceiling grid comes down first. Then lights. Then glass. Then the metal studs that …

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Cities That Reuse America: Chicago - Reuse, Chicago-Style

Cities That Reuse America: Chicago Chicago is a city that builds in layers, then keeps those layers in circulation. You can feel it in the streetscape. Limesto…

Read briefing

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.