Helen and Rob live in a Victorian terraced house in St Albans. When they bought it five years ago, it needed a lot of work. They have put all their energy into renovating the entrance and the front room, but the back of the house remains a mishmash of tiny and unpractical rooms. A narrow kitchen is uncomfortably close to the only family bathroom, and a dark, windowless utility space has Helen comparing the rear of her home to a dungeon.