21 Gloucester Place is an elegant, Grade II listed Georgian townhouse that has recently been refurbished by Feilden+Mawson to provide contemporary, high spec office space for The Portman Estate in Marylebone. Originally built in 1790, the building is situated in a prominent position on the corner of George Street and Gloucester Place, in the Portman Estate Conservation Area.

Feilden+Mawson were the architects and lead consultants for the refurbishment of the Grade II listed building. Comprising of three bedrooms (all with ensuites), one WC, a combined living and dining room, and a garage with an electric charging point, F+M have delivered an impeccably designed residential property. It’s contemporary and modern aesthetic contrasts, yet respects, the language of the existing building while not betraying the technically proficient upgrading required to improve its thermal performance to reduce its overall carbon footprint and long-term energy demands. Contemporary WCs, shower rooms, and kitchens now complement the historic setting. Bespoke lighting enhances both the full-height main stairwell and several of the meeting rooms.

The property is the first Grade II listed building in the country to achieve Passivhaus Enerphit Standard. The project also received a BREEAM Excellent accreditation.