Contract awarded for £50M low carbon London office scheme

Main contractor ISG has won the contract to redevelop and refurbish Woolworth House in Marylebone, central London.

The mixed-use scheme, for General Projects with Henderson Park, will increase the building’s gross floor area by around 9,290m² to over 21,900m². It includes the complete refurbishment of the existing eight-storey office building, located at 242 Marylebone Road in the London Borough of Westminster.

Renamed Metropolis, the new building will benefit from both office and retail facilities, with external green roof terraces across every floor. An events auditorium, rooftop-bar, on-site coffee shop, cyclist zone as well as new health and wellbeing amenities complete the specification.

A new extension will significantly increase outdoor and green space, adding new landscaped gardens. To achieve this, the scope of work includes infilling the existing courtyard area up to the seventh floor, providing tiered planted terraces, while the structure will be extended across floors three to eight using a steel frame with cross laminated timber (CLT) floor slabs.

In addition, the existing roof plant enclosures will be removed and consolidated, allowing the creation of rooftop office pavilions on levels five and eight.

Designed by London architect AHMM, the environmental performance of the refurbished building will be boosted to a BREEAM rating of ‘Outstanding’. Careful retention of existing building material will result in over 4,500 tonnes of carbon saved during the construction process and diverted from landfill.