this question is refering to the house described in the beginning of the story.
Poe uses metaphor, simile, and personification to describe the bleak house. The degrading house matches the degrading Usher. Here is a sample from the text:
"upon the bleak walls - upon the vacant eye-like windows - upon a few rank sedges - and upon a few white trunks of decayed trees - with an utter depression of soul...Nevertheless, in this mansion of gloom...The discoloration of ages had been great. Minute fungi overspread the whole exterior, hanging in a fine tangled web-work from the eaves. Yet all this was apart from any extraordinary dilapidation."
