Took me awhile to find the old drawings from back when I bought this place, but here is the footprint of the original house on the lot.
It's not a huge lot, but then I didn't want to mow grass all weekend (and currently I pay the neighbor boy to do that). My mom's place has more than 1 acre to care for, and that is way more than either of us want to maintain, even if it does look like an English park.
This is my try at adding the new part to the old house -- not to scale, although I did the best I could, since I really want to eyeball the remaining space and work out where other things need to go & think about landscaping. The addition sits about four feet beyond the old porch roof, which spanned the back of the house. I think there is room enough for a modest garage behind the house (someday).
The backhoe man arrived at 7 am today and started in with an earth-compactor, much to the cat's distress. I hope my neighbors weren't planning on sleeping in. 0_o Me, I'm going to work as soon as I call the plumber to fix the commode.