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slug: urban-mining-reuse
created: 2026-05-06
updated: 2026-06-25
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# Urban Mining and the Reuse Supply Chain

Urban mining starts when an existing building is treated as a stock of recoverable assets rather than a pile of future waste. The work is practical: audit the building, separate the streams, protect the components that still have product value, test what has to be certified, and move the recovered material into a buyer's specification before weather, storage cost, or demolition speed destroys the opportunity.

This section covers the supply-chain patterns that make that work credible, roughly in the order the work itself runs:

- Finding the stock: [material stock analysis](material-stock-analysis.md) estimates what a city or portfolio holds and when it becomes available, and a [pre-demolition material audit](predemolition-material-audit.md) verifies that stock building by building before the strip-out clock starts.
- Grading it: [component reuse potential assessment](reuse-potential-assessment.md) turns an audit's hopeful inventory into a defensible decision about what can credibly be reused, repaired, or recycled.
- Recovering the high-value components: [reused structural steel](reused-structural-steel.md), [reused precast concrete elements](precast-element-reuse.md), and, where intact reuse is not credible, [recycled concrete aggregate](recycled-concrete-aggregate.md).
- Moving it into a buyer's specification: [reverse logistics](reverse-logistics.md) is the physical collection-storage-grading-delivery chain, [salvaged-component marketplaces](salvaged-components-marketplace.md) are the matching layer, and a [circular construction hub](circular-construction-hub.md) wraps both with regional storage, inspection, and finance.

Start with [Pre-Demolition Material Audit](predemolition-material-audit.md) when a project is about to take an existing building apart. It finds the recoverable stock early enough for the steel, concrete, salvage, and contract patterns to do real work.

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- [Next: Reused Structural Steel](reused-structural-steel.md)
- [Previous: Design for Maintenance and Repair](maintenance-repair.md)