An office closure or consolidation is where ITAD stops being an IT project and becomes a logistics problem. The computers are the easy part — the building also holds AV systems, conference equipment, network infrastructure, lab and specialty gear, and universal waste like batteries and lamps that carry their own regulatory handling requirements.
Most of it is quietly data-bearing: conference displays cache configs and credentials, badge and camera systems hold personnel data and footage, networking closets hold the map of everything. And the lease deadline doesn't care which vendor handles which category.
Single-vendor decommissioning collapses the chaos: one schedule, one chain of custody, destruction evidence for the data-bearing assets, compliant handling for the regulated waste, value recovery on what can be remarketed, and one documentation package when the keys go back.
One call covers the whole building — IT, AV, infrastructure, universal waste — with the paper trail intact.