Laura Jane Clark and Robert Jamison compete to redesign the home of accountants Mimi and Luke, whose terraced house in Grantham is bursting at the seams. The couple live with their two-year-old daughter and Mimi's 10-year-old son, while Luke's two older children are often there as well, but the layout of the house remains completely impractical. Mimi and Luke are blown away by Laura and Robert's visions, but now face a difficult decision - which one will they decide to build?

S1 Ep4