As we grapple with our growing needs and changing lifestyles, the idea of expanding our homes can be an appealing one. The addition of an extra room, an expanded kitchen, another bathroom or a brand-new conservatory can add valuable living space and potentially increase the value of our homes. But the question that often arises is, how much does a house extension cost? In this article, we take a look at typical house extensions, their associated costs, and the critical factors to consider, such as planning permission and potential escalating costs.