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Crescent House

Client: Galliard Homes Limited

Sector: Residential – Permitted Development

Value: Circa £3m

Services: Mechanical and electrical design up to RIBA Stage E, with the potential to progress the project through to construction.


The complete project is a permitted development involving the conversion of an existing 1930s three storey office block. Originally a two storey office used by the Union of Post Office Workers, the building was extended via the addition of a mansard roof in 1976. The building has been vacant since 2012. The building is to be converted into 36 flats, with the inclusion of a five storey extension to the rear of the central core.

As this is a permitted development the existing building is to be refurbished to the latest Building Regulations Part L1B, with the central core extension to be to Building Regulations L1A.

A number of options for the mechanical services to the dwellings were considered, with central plant supplying the whole site one of the options considered; however, at this time individual gas boilers to the extended central core and electric wet heating to the existing wings was chosen as the way to proceed.

The existing drainage system was extensively expanded to allow for additional soil stacks to all flats.