Double Your House for Half the Money

In St Ippolyts in Hertfordshire, Sarah meets Ben and his French housewife Alex and the couple's six children. The family want to turn their tiny three bedroom home into a stylish six bedder, but on a very tight budget. In Clapham, south London, Stephen and Tara are feeling the squeeze and want to dig out their basement. But once digging commences the costs start to spiral.