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Cost analysis based on gross internal floor area, for tender sum. Cost data provided by David Reynolds and Jim Crouch at Buro Happold

DEMOLITIONS AND ALTERATIONS £198/m 2Internal demolition of all walls, concrete upper floors and part basement slab and roof, external walls only remain; temporary support; alterations to adjoining property.

SUBSTRUCTURE £79/m 2Basement concrete slab; underpinning to external walls

SUPERSTRUCTURE Frame £185/m 2Steel frame to support upper floors and steel technical gallery Upper floors £348/m 2Mainly concrete upper floors with areas of timber in lobbies; timber plenum construction and fixed seat framing in auditorium; acoustic floor construction to all upper floors.

Roof £76/m 2Timber roof structure; plywood sheeting and zinc standing seam covering Staircases £48/m 2Mixture of in situ concrete and bespoke plywood staircases and landings; mild-steel handrails External walls £49/m 2Bath Stone clad wall at roof/parapet level; various stonework repairs Windows £68/m 2New and replacement hardwood windows; secondary glazing with blinds and shutters; Trocal clerestory and dormer windows; repairs to existing timber windows; acoustic linings to window reveals.

External doors £7/m 2Hardwood external doors and frames, including ironmongery Internal walls and partitions £52/m 2Blockwork and stud partitioning; acoustic barriers and fire stopping Internal doors £73/m 2Solid-core, ply-faced flush doors, frames and ironmongery

INTERNAL FINISHES Wall finishes £56/m 2Felt acoustic wall linings; PVC wall-feature panelling;

auditorium render; mirrored-wall areas Floor finishes £51/m 2Resin flooring in basement; rubber-sheet flooring or carpet to other areas; plywood flooring to stage and rehearsal room Ceiling finishes £23/m 2Plasterboard suspended metal frame system Decorations £40/m


Furniture £66/m 2Auditorium seating; signage; bespoke plywood WC partitions; inbuilt seats; bespoke joinery counters; benches and desks

THEATRE EQUIPMENT £133/m 2Lighting bars; specialist stage lights; sound system; technical power supplies; paging system; stage-control desk

SERVICES Sanitary appliances £16/m 2Adult and child WCs and Disabled WC Disposal installations £64/m 2Pumped underground drainage system; above-ground drainage to WCs, dressing rooms and café; cast-iron downpipes to roof Water installations £21/m 2Mains-fed water system to WCs, café, dressing rooms.

Space heating/air treatment £174/m 2Air-conditioning to auditorium; air heating and ventilation Electrical services £174/m 2Power, lighting and specialist installations Lift and conveyor installations £62/m 2Eight-person passenger lift serving five floors and goods scissor lift serving the stage Protective installations £61/m 2Alterations to sprinkler system in adjacent properties, fire alarm system Communication installations £17/m 2Paging system, data installation and hard-of-hearing loop Builders' work in connection £9/m 2

EXTERNAL WORKS Landscaping, ancillary buildings £6/m 2Access ramp and modifications to external paved areas

PRELIMINARIES AND INSURANCES Preliminaries, overheads and profit £358/m 2GENERAL CONTINGENCY £138/m 2

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