Chennai Rubble AtlasWhere Chennai’s demolition rubble goes, who trades it, and where to find it.
Rubble is a material. It just isn’t treated like one.
The aim is simple: to use demolition rubble as a building material, without disturbing the system that already handles it.
To do that, we first studied how Chennai’s demolition logistics already work: every stage from demolition to disposal, every actor, every route. Much of it works remarkably well. Steel, copper, brick and wood all find buyers within days, and that trade supports crews, scrap dealers and markets across the city.
So we looked for the one place where no one is competing. After a site is sorted, the concrete is left behind: around 60% of the building, with only 8% recovered. That is the point where we step in. Instead of going to a plant, or into a wetland at night, the concrete can go straight to someone who needs it.
Nothing is taken from anyone. The scrap dealers keep their steel, the markets keep their brick, the crews keep their work. The concrete that no one wanted becomes a resource, and the system becomes circular without disturbing the economy it already has.
- 01Hazmat surveyAsbestos, chemicals
- 02Selective stripCopper, aluminium → kabadiwala
- 03DemolitionFloor by floor
- 04Rebar extractionSteel → re-rolling mills
- 05SortingBrick, wood, tile → market
- ◉We step in hereConcrete → reuse
- 06TransportPlant, or the marsh at night
Study the system
Map every stage, actor and route as it works today.
Find where to step in
The point where a material has value but no buyer: concrete, after sorting.
Divert, don’t disrupt
Take only what no one wants. Leave the existing trade untouched.
Built for everyone who handles rubble.
Pick your role. The planner and the board set themselves up for what you need.
Plan it in numbers.
Enter a demolition to see the tonnes, trucks, stockpile and route. Or enter what you need and find who has it.
Most of a building is sold before it leaves the site. Concrete is what’s left behind.
Run a demolition.
Built for value, not for volume.
Migrant crews take buildings apart, scrap dealers pre-book the steel, and markets resell brick, wood and tile. The formal system runs at a quarter of its capacity.
About 1,000 of 4,000 TPD. Kodungaiyur and Perungudi together.
Paid each year to Delhi MSW (Ramky) for Zones 5 and 6: 78% of the ₹352 cr citywide budget.
Per trip. The fine, if caught, is ₹500–5,000. 260 cases, ₹13 lakh, Jan–Feb 2025.
Where the ₹276 cr goes
An independent engineer monitors the contract, but the contractor pays 50% of their salary. Ramky Group also manages most of Zones 1–8 and will run the proposed waste-to-energy plant at Kodungaiyur.
Recovery by material
Everything with a buyer is recovered. Concrete is the orphan.
Who handles the rubble
Who generates it
- Micro, < 1 MT
- Household repairs.Call 1913 for a free pickup.
- Small, 1–20 MT/day
- Renovations and small builders.Deliver to the plants directly and obtain a receipt.
- Large, > 20 MT/day
- Commercial demolition.Vendor pickup with a processing fee. GCC bylaws, 2025. Dumping elsewhere: ₹500–5,000 fine.
The circular path
- BIS 2024
- Recycled aggregate allowed up to 50% in main concrete, up from 25%.100% in lower road layers.
- IIT Madras
- Roads with 100% recycled aggregate tested.With the Indo-German Science Centre; pilots in Chennai and Ladakh.
- Habitat for Humanity
- A multi-purpose hall in Kancheepuram built from Perungudi C&D waste.With M-sand and recycled concrete, February 2024.
- The barrier
- Nobody specifies it.No real-estate buyer demand yet.
Find it.
Demolitions posted from the planner, requests for material, and the sites named in the research.
Rubble, point by point.
Seven pieces of Chennai concrete. Pick one up.
+ R-01
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