Office-to-residential conversion economics usually fail in the middle, not at the beginning

At first glance, a vacant office building can appear to be a bargain because the shell already exists. That surface impression is misleading. The structural frame is only one piece of residential feasibility. The real cost pressure often comes from the conflict between an office floor plate and a residential planning logic that requires daylight access, repetitive plumbing, efficient vertical circulation, and code-compliant egress.

When the plate is too deep, the design team is forced into long double-loaded corridors, oversized light wells, expensive facade modification, or a unit mix with weak livability. When the core is in the wrong place, rentable efficiency erodes further. When building systems are outdated, the mechanical, electrical, plumbing, and fire protection scope expands at the same time. The result is not one bad number. The result is multiple small penalties stacking on top of each other until the conversion spread disappears.

That is why a strong early conversion screen should never rely on acquisition price and raw area alone. It should test usable residential yield, anticipated systems replacement, facade intervention, lobby repositioning, vertical transportation adequacy, and circulation losses together. If the project still works after that pressure test, it is worth deeper study. If it only works before those realities are introduced, the project is not actually cheap.