How Greyn works
Greyn is the B2B marketplace for surplus and reusable construction materials. Sellers place a listing, buyers find locally available materials, and both parties trade through a professional channel.
One professional channel for surplus and reuse
In the construction sector, many usable materials remain unused: project surpluses, returns, slow-moving stock or materials from demolition and renovation projects. Greyn makes those materials visible and tradeable through one B2B marketplace.
For sellers
A new channel to monetise existing stock.
For buyers
Quick access to locally available construction materials.
For the sector
Less waste, more reuse.
How it works for sellers
Place a listing
Take a photo of your material, add specs and publish. With AI support, a listing takes just a few minutes.
Reach professional buyers
Buyers search and filter by material type, location and availability. Your offer becomes visible to relevant businesses.
Handle professionally
Communicate with the buyer, make arrangements and handle the transaction via Greyn with clear documentation.
How it works for buyers
Search available listings
Browse listings from verified businesses. Filter by material type, location, quantity and availability.
Compare and get in touch
View details, photos and specs of a listing. Ask questions or make arrangements with the seller.
Order and collect
Confirm the transaction, arrange payment and plan collection or delivery as agreed.
Faster listings thanks to AI
From hours of admin to just minutes per listing.
A professional B2B channel
Verified businesses
Only professional businesses can trade on Greyn.
Transparent listings
Clear material information, photos and specs.
Professional handling
B2B trade with invoicing and clear documentation.
Support
The Greyn team helps with questions or issues.
Frequently asked questions
Ready to get started with Greyn?
Create an account, place a listing or browse the available offer.