Holles Street Hospital involved the construction of a new operating theatre, associated ancillary accommodation and plantrooms.

The project comprised the construction of a two storey extension, at third and fourth floors of the existing hospital building with attached five storey (fire exit only) stair-well and break-ins to the existing building on first, second, third and fourth floor levels.

Daily consultation and forward planning was required with the hospital authorities to ensure there was no disruption as the works included some internal remodelling at third floor level to rearrange accommodation which became displaced due to tie-in of the new accommodation and the project was bounded on three sides by the existing hospital building.