two-up two-down 
noun British informal
A house with two reception rooms downstairs and two bedrooms upstairs: he has returned to his two-up two-down in Billericay...
- I was raised and lived till I was married in a traditional two-up two-down terraced house with no bathroom and an outside toilet.
- Life wouldn't be as glam as in the original show, they wouldn't be as rich, and they'd be more likely to be living in a rented two-up two-down in Leeman Road than an art deco-style loft apartment.
- ‘Take the kids and go back up to Yorkshire,’ he said, so my grandmother - with an eight-year-old boy, three girls aged six, four and two, and a new baby (my dad) - went back to Barnsley to live with her parents in a two-up two-down in Old Mill Lane.