The process of wholeheartedly altering a building. The function is the most obvious change, but other alterations may be made to the building such as its structure, circulations routes and its orientation. Additions may be constructed while other areas may be demolished., hoone muutmine täies ulatuses, kusjuures olulisim on hoone funktsiooni muutmine, millega kaasneb tihti hoone konstruktsiooni, liikumisteede ja asendi suuna muutmine