Office buildings can be very hard to convert to residential uses. Office tenants want large, unbroken floorplans, so most office buildings built in the last fe

Office buildings can be very hard to convert to residential uses. Office tenants want large, unbroken floorplans, so most office buildings built in the last few decades have a lot of interior space that's far from any windows. Residential uses need windows for every unit. Adding plumbing for individual kitchens and baths, creating separate HVAC zones, etc. adds more costs and complications.