It depends on which FTTP programme the 'main estate' falls under ?? If it's 'Retro New Sites' (ie: built within the last 30yrs) then this will be because the estate is ducted. If your 'small road' is fed overhead or by buried cable (DiG), then it probably won't have been captured on the Ghost Plan blueprint ??
It's a hard call to make based off the info we have, I'm afraid.