2 by 4s free to a good home!!
08648
Wood2"x4"x5'
Available until November 30, 2025
Circular materials marketplace
Waste less. Build smarter. Join the circular future of construction.
CircularBuild is a donation-first marketplace that keeps surplus materials in motion. Share what's left on your job site, match it with builders in real time, and document the climate impact every donation creates.
2.8M lbsMaterials diverted
640Active donors
3.5 daysAvg. pickup time
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Preview a handful of active donations below. Sign in when you're ready to save listings, chat directly with donors, and coordinate pickups.
timber
90024
Wood2'x4' piece
Available until November 29, 2025
Steel piping
94020
Steel1" DIA
Available until December 10, 2025
≈ 12 lbs • 10.1 kg CO₂e
Stain glass window
75001
Glass2' by 3'
Available until January 24, 2026
≈ 12 lbs • 3.3 kg CO₂e
Stories from the field
Donors and builders proving circular works at scale.
Coordinated pickups, transparent chat threads, and impact-ready reporting keep reuse simple for both sides of the exchange.
Read more storiesFrom Smoke to Ceilings: Knauf India’s Revolutionary Announcement
What if the ceiling above your head were made from coalplant exhaust instead of mined rock? In India’s booming construction market, one major player is rewriti…
Read briefingThe Hidden Weight of Construction: How Denver Is Tackling the Embodied Carbon Crisis TODAY
When a new tower rises above the Denver skyline (and any other major metropolis), the focus often lands on height, design, and cost. But beneath the glass and …
Read briefingReady to keep materials in circulation?
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