In this episode, Aidan Keane helps two couples design their new extensions. In the Big House in Northamptonshire, Jon and Jo have £50k to open up their dated property and create new areas to live and entertain in. The budget is tight but they're prepared to roll up their sleeves and get stuck in to get the job done. In the Little House in Greater Manchester, James and Lucy have £20k to breathe new life into their dark and damp cellar and transform it into a light, bright family-friendly space. Using his years of experience, Aidan helps both couples spend wisely - but will they listen?