This is a very, very, very old book. You probably had to read it in high school. At least part of it.
The thing that stands out about that house is the complicated roof design. Does part of the answer involve the roof?
I’ll take a wild guess at Ann of green gables ?? Playing a few games today when I’d normally be out in garden or shopping I’m not going anywhere 43c here today
I thought for sure @Milla Jonas had it. There are 7 gables on the roof if you count the end. The House of the Seven Gables ?