50 Berkeley Street

Mayfair W1J
Commercial development

Key Details

50 Stratton Street, London W1J 8LL
Use Classes


50 Berkeley Street & 50 Stratton Street redevelopment in Mayfair, London W1.

Astrea is will redevelop the two office buildings. Both buildings will be updated to provide high-quality modern office accommodation which is more sustainable, more energy-efficient and enhances the wellness of their occupants.

The scheme will provide 270,000 sq ft of fully refurbished offices with private and communal rooftop terraces in both buildings. 50 Stratton Street will have a restaurant and retail space at ground level.

The buildings will offer facilities and significantly enhanced amenities.

The scheme is targeting a minimum of BREEAM 'Excellent'.

Construction is expected to start in Summer 2022.


The site was originally the Gardens of Devonshire House, built in 1673 by John Berkeley, Baron Berkeley of Stratton.

The building currently occupying the site at 50 Stratton Street was designed by EPR Architects and completed in 2001.

2021 January - Westminster Council approves plans for the redevelopment.

2020 September - Planning application submitted for the demolition of existing roof storeys and rebuilding to create a new sheer storey at the fifth-floor level and realigned tiered extensions at sixth, seventh and eighth-floor level, plus rooftop plant room. Erection of full height extension (ground to new eighth-floor level) in rear enclosed lightwell. Creation of new terraces on all elevations at sixth, seventh, eighth and roof level. Use of ground floor unit (northern unit) for either retail or office use within Class E and use of the ground floor unit (southern unit) for either retail, restaurant or office use within Class E. Alterations at ground floor to bring the building line forward and align with column line, and including new shopfronts and entrances. Westminster Council ref. no. 20/06105/FULL.

2020 September - Online consultation from 2nd to 15th September 2020.

Site & Location


Project Manager
Structural Engineer
Cost Consultant
Services Engineer
Daylight and Sunlight Consultant
Landscape Architect
Heritage Consultant
Transport Consultant
Ecological Consultant
Office Leasing


News, events, milestones and offers from the new development
+ Post a new milestone


Information on this page is for guidance only and remains subject to change. Buildington does not sell or let this property. For more information about this property please register your interest on the original website or get in touch with the Connected Companies.