Space House
We were employed by Seaforth Land to carry out enabling works at Space House, the former home of the Civil Aviation Authority on London's Kemble Street.
The offices consisted of two separate towers - the circular 13-storey Kemble Tower and the 8-storey Kingsway Building.
Technical Challenge
The grade II listed buildings were constructed from reinforced concrete and incorporated a number of listed features including the Kemble Tower entrance and staircase, mosaic work on the roof and an ornate T piece top level of Kemble Tower.
These areas were protected from the live demolition works and were incorporated in to the final design of the refurbished building.

The works enabled the refurbishment and extension of Space House, in order to provide high quality office space with modern, flexible retail space at ground floor level.

The scope of works included a full programme of asbestos removal followed by full soft strip of both structures.

On completion of these works, the top two floors of Kemble Tower were dismantled for reuse  with numerous structural alterations to both buildings.

Swanton Consulting designed a bespoke temporary works solution to facilitate these works, allowing the T pieces to be lifted down via stillages, for further transport off site to complete a refurbishment scope and later, future reinstatement.

Works included asbestos removal, soft strip, top-down demolition, temporary works and structural alterations.
Erith's in-house design engineers, Swanton Consulting, provided detailed designs for propping to the basement through to the top floors ensuring that the structure remained supported during the demolition process.  Swanton also designed the slab for the tower crane and propping for floor slabs while new lift shafts were cut.
Live services

Throughout the project, UKPN required safe 24 hour access to the basement switch room.  Together with a live transformer room and various HV, fibre and telecommunications and government cabling running through or adjacent to the site. Works were carefully planned and carried out to avoid any disruption to the supplies powering Covent Garden and Kingsway during the works.


The commencement of works coincided with the start of the pandemic, meaning that alterations had to be made to processes and procedures on site to ensure government guidelines and company protocols were followed.  Despite the potential for delays, works were completed in a very short time scale to the complete satisfaction of the client.

Summary of service
Asbestos removal
Soft strip of all remaining non-structural items
Removal of all windows and glazing
Erection of tower crane
Temporary works to precast façade panels
Removal of precast façade panels
Temporary works to basement retaining walls
Structural opening up works
Ground floor demolition works
Working with and around listed assets.