The concept was to create a seamless transition between old and new, borrowing from the building’s Queen Anne decorative heritage with elegance and subtlety. Situated in the Smith Square Conservation Area, the building is rich in character with a generous interior space typical of its prestigious neighbourhood. Originally a post office and subsequently the UK Government’s Cabinet Office, this is a fine example of London’s architectural legacy.

The conversion from office to residential is a natural transition that benefits from the substantial floor-to-ceiling heights and existing rhythm of the fenestration. We have retained much of the original structure whilst making significant improvements such as reinstating the original entrance door, adding a new corner bay expression and extending the roof volume to two storeys. The new mansard roof conceals three duplex penthouses with private terraces and superb views of the local area.

The building’s common areas have been redesigned to focus on the dramatic sweeping staircase with a grand reception area featuring an intricately tiled floor and coffered ceilings to mimic the historic cornicing. A palette of polished copper and dark timber panelling add a level of sophistication and craftsmanship that complete the buildings transformation to residential use.

The internal aesthetic beautifully combines old and new, with subtle references to the original Queen Anne decor, a nod to Art Deco styling and a distinct contemporary urban style.

The overall sustainability strategy combines complementary renewable technology, low environmental impact materials and green/brown roofs, enhancing site biodiversity and upgrading the façade to improve insulation levels. 67 Tufton Street is designed to achieve a BREEAM ‘Domestic Refurbishment’ Excellent rating.