Ansdell Street

Location: London, UK
Scope: Office Headquarters
Area: 1,350 sqm
Stage: Completed 2016
Client: BB Energy
Architect: Studio Seilern Architects
Structural Engineer: Elliott Wood
Services Engineer: Atelier TEN
Quantity Surveyor: Jackson  Coles
Lighting: Atelier TEN
Landscape: Hyland Edgar Driver  (HED)
Photography: Morley von Sternberg, Philip Vile

A commercial development that breathes life into a 1970’s office block, this scheme comprises the refurbishment of the interior spaces while retaining the existing structure and adding a new stair and lift core.  The existing street façade has been re-clad, while an origami roof structure gives this quiet Kensington Street a contemporary edge.

The main challenges of the existing building included the limited floor to ceiling heights, residential-type windows and an elevation treatment of little or no merit.  The new façade incorporates more commercial large-scale windows, which mitigate the lack of natural light and re-introduce the principles established by the late 19th Century buildings that once occupied the site. At ground level, large warehouse type window openings with floor to ceiling height windows were introduced, giving the building a distinctive character, more reflective of its use.

The existing building and its location presented a series of challenges, primarily at roof level where Daylight and Sunlight legislation imposed limitations to any increase to bulk or mass.

The revised massing employed an innovative contemporary interpretation of a mansard roof. Using an origami geometry, the mansard roof pitches back from the street front to achieve the desired ceiling height, while avoiding an imposing bulk when seen from the street. Due to the pitched nature of the origami structure, the massing appears more sympathetic and integrated in the overall building mass and within the Daylight, Sunlight and Rights of Light site constraints.