Earlier quoted context omitted.
> This is necessary because many office floorplans are huge with modern HVAC and when converted into residential you end up with either undesirable or illegal apartments due to lack of windows/egress/etc. Couldn't you just wall off the middle? I mean, you do get another set of windows on the inner courtyard, but it seems expensive to perform such major surgery on a building.
Depending on local laws.. windowless apartments are illegal. windowless bedrooms are illegal. etc.
https://www.greenbuildingadvisor.com/article/bedrooms-withou...