Major alterations and refurbishment of a large Grade 2 listed terrace in Belgravia. The existing property consisted of the main house as well as two connected mews houses at the rear. An unlovely central lightwell did little to benefit the house and added to the awkward and convoluted circulation. We enlarged and enclosed the lightwell to create a spacious and light-filled internal atrium which includes a spectacular floating stone stair, unlocking movement through the house and creating a new space at its heart. The entire house underwent a complete internal and external refurbishment.