An office only needs one central water/sewer connection for the bathroom and kitchen. Renovating concrete floors to add additional water/sewer connections - and

An office only needs one central water/sewer connection for the bathroom and kitchen. Renovating concrete floors to add additional water/sewer connections - and renovating the main water intake and sewer lines to handle the additional volume makes office -> housing renovations more expensive than flattening the building and starting over from scratch (which is obviously horrible for the environment)