This building has been debased.
An example of debase is to lower the value of a building by spray painting it with graffiti.
transitive verb-·based′, -·bas′ing
Origin of debasede- + base, aphetic from abase
transitive verbde·based, de·bas·ing, de·bas·es
Origin of debasede- base 2
(third-person singular simple present debases, present participle debasing, simple past and past participle debased)