Rooftop extension to a 6-storey 1930’s mansion block in Bloomsbury. The single storey 135m2 extension creates two new penthouse apartments with generous private terraces and fine views over Brunswick Square.

The site, facing Brunswick Square, is in the Conservation Area and adjacent to the listed Brunswick Centre. The extension is designed to be unobtrusive, set back all round from the existing building’s parapet and responding to its articulation and symmetry.

Client: Freshwater Group

Cost: £1.2 million

Status: Current (Stage 3)

Team: JLL, Matter (as McDowell+Benedetti to stage 3), KM Heritage, Price & Myers, FHP Engineering Services, Savills