Lack of opening windows is a bigger deal. Replacing all the curtain walls and stripping the place down to concrete gets suspiciously close to new construction c

Lack of opening windows is a bigger deal. Replacing all the curtain walls and stripping the place down to concrete gets suspiciously close to new construction costs. The land had better be worth it. I've seen in down quite successfully in dense urban locations for condos but that only worked because the land was highly valuable and the building had grandfathered exemption from zoning / sightline laws for height.