In Wales, George meets Tim and Kirsti, who are embarking on a renovation to create a new home for their blended family. Tim's two children recently moved over from South Africa, making their current rental tight on space, so they needed to upsize and quickly. The high-street-shop-turned-accountants'-office offered the five bedrooms they needed for a price they could afford. However, it lacks a family kitchen as well as connection to the garden, so they need to build a modern extension. But the building was built in 1725, is listed and is in a conservation area, which doesn't make things simple.