The last remaining building of it's kind, built behind a Grade I listed John Nash facade on Regent's Park
In 2021, Marek Wojciechowski Architects secured unanimous planning consent from Camden Council for the restoration and extension of the Grade I listed Diorama – the last surviving building of its kind. Built in the 1820s behind a John Nash terrace, the Diorama was designed to house a theatrical invention by Louis Daguerre: an immersive rotating viewing platform that became an early precursor to cinema.
The building had remained vacant for several years, with previous redevelopment proposals failing to secure approval. Working closely with Bidwells’ heritage consultancy team, we navigated the complex planning process, engaging with Historic England and the local conservation area group to achieve permission for the renovation of this iconic London landmark.
Our proposals reinstate the central rotunda, bringing the building back into meaningful use while preserving its structure and spatial character. The flanking buildings, originally residential, will be returned to single family homes. The main Diorama space will be adapted into high quality office accommodation.
The site overlooks Regent’s Park and includes access to private gardens and tennis courts. A new fourth floor extension will increase the total floor area from 30,000 to around 42,400 sqft.
The design was informed by a detailed heritage study by Bidwells and shaped in close consultation with Camden’s conservation team. The project safeguards the building’s future while re-establishing its presence within the Nash composition.
