Project 1947
Metropolis
Contemporary workplace refurbishment of Richard Seifert’s Woolworths building at 242 Marylebone Road, increasing the floor area by about 50%.
Location
City of Westminster
Client
Henderson Park, General Projects
Architect
Allford Hall Monaghan Morris
Status
On site
GIA
16,258m²
Feature
Key features
Rear terraced extension
The refurbishment fills in the former car park space with a terraced ‘wedding cake’ style extension, adding floors to the rear block.
Working with existing floor-to-ceiling heights
Tight head heights in the existing building have required a thin structural zone to the extension, this has been overcome with new RC flat slabs.
Reducing weight on the existing foundations
To reduce weight on the existing foundations and maintain a large column grid, a steel frame with lightweight cross-laminated slabs was used on the additional floors.
Relocating plant to enable floor space
A new basement plant room is planned below the existing car park, freeing up roof area for high quality office space.
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