some would have a side entry, sometimes under roof, but open for carriages or buggies to stop to drop off passengers, then drive further to the back of the property to tie the horses; service entrance for household help, ice deliveries and kitchen uses; the formal entry with porch for sitting out, no air conditioning, a lot of socializing was on porches. when you see 2 sets of stairs, generally the front, formal stairs to the bedrooms, the second set of stairs for the maid(s) they would get to the kitchen first, to light the kitchen stove fire and get the day started. the bedrooms were (usually) on the same 2nd level, but the maid's quarters would be to the rear, with steps to the kitchen area. sometimes the maid/servants' quarters would be in the attic. these stairways are plain and kinda narrow, sometimes steep - almost an afterthought.
outhouses were behind the property. sometimes old city lots, in the midwest, would be rows platted 50X250' long+narrow, with alleys in the back. horses would drive through that way. outhouses in back.