The building is located in a prominent position on Euston Road close to St Pancras International station. It was constructed for and, until recently, occupied by Unison who will lease the building to Stanhope Plc with the aim of maximising the net lettable floor area for office use.
The existing building, although distinctive in form and appearance, has a number of constraints. It consists of an 11-storey tower connected, by a glazed link, to a 5-storey annex building. A freestanding but inflexible conference hall, solely used by Unison, completes the set of building elements. At ground floor an office reception and a retail unit are accessed via a series of steps. Externally, the building is clad with profiled storey-height concrete panels and narrow strip windows.
The design aspires to improve the standard of accommodation and accessibility into the building whilst creating more transparency at ground floor. This will be achieved by lowering the reception floor slab to street level and increasing the extent of glazing to enhance animation at this level. The conference hall will be removed and replaced with 2 storeys of office accommodation, together with a green roof. The window units will be replaced with a continuous curtain walling system to improve the daylight penetration and thermal performance of the building. The original concrete panels will be retained and cleaned. A cantilevered roof structure or ‘halo’ will be added to the tower to provide the building with a striking feature.
The existing building services will be replaced and defined by a sub-metering strategy which encompasses on-floor plant with the aim of limiting carbon emissions to 30kg.CO2/m² with an EPC Grade B.