Use a maths set to help make your houses, I find that the set square is perfect for getting a triangle shape for your house roof! No need to measure it!
Collage images which are normally used for Slider Mailers, Bottle Caps or Inchies are all a perfect size for Row Houses!
Background scraps and left overs are perfect to make into Row Houses!
Make yourself a Row House template first and use it to draw round and cut shapes onto a handmade background sheet in advance before stamping them.