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Elemental cost analysis
Element Total cost £/³¾ % of
total cost 		Specification
Substructure 1,193,996 55.86 3.10 CFA piles, groundbeams and groundbearing slab
Superstructure
Frame 1,616,699 75.63 4.20 Steel frame, 9 x 9 m grid; intumescent paint fire protection
Upper floors 555,000 25.96 1.44 Composite deck
Roof 1,579,070 73.87 4.10 Kalzip standing sseam zincwith Northlights and curved ridges
Stairs 671,389 31.41 1.74 Internal feature stairs and fire escape pcc stairs
External walls 3,232,036 151.20 8.39 Brickwork, lightweight steel inner leaf, zinc feature cladding
Windows and doors 1,852,078 86.65 4.81 Aluminium cladding and frame system with security and acoustic rated glazing
Internal walls and partitions 1,312,509 61.40 3.41 Highly cellularised part glazed space with full height doors
Internal doors 418,948 19.60 1.09 Full height doorsets
Internal finishes (to Category B occupant’s fit out)
Walls 584,942 27.37 1.52 Ceramic tiling and painted walls; plaster to walls
Floors 1,484,399 69.44 3.85 Raised floor and carpet tiles; screed to atrium base; feature timber and stone; flooring to central areas
Ceilings 1,181,042 55.25 3.07 Glass-reinforced-gypsum suspended ceiling tile system and atrium soffit (acoustic rated)
Fittings and furnishings 1,922,809 89.95 4.99 WC cubicles, blinds, signage, shopfronts, glazed screens, specialist joinery, kitchen equipment
Services
Mechanical installations 6,101,923 285.46 15.84 Central roof plantroom, four-pipe fire control units, 6x6 m
Electrical installations 3,393,995 158.78 8.81 Market model upgraded for highly cellularised space
Lift installation 223,700 10.47 0.58 Four lifts overall
Fire protection 265,770 12.43 0.69 Drop-down smoke curtains, fire alarm systems
Communication installations 631,497 29.54 1.64 Data cabling only (equipment by client)
BWIC 245,916 11.50 0.64
Main contractor costs
Preliminaries, profit and overheads 3,935,889 184.13 10.21
Sub-total 32,403,609 1,515.93 84.10
External works/infrastructure 6,128,467 286.71 15.90 Brownfield site requiring utilities, groundwater control, amenity landscaping and high ratio car parking
Total construction cost 38,532,076 1,802.63 100.00
Guillemont Park (Phase 1)
Completion date: September 2000
Gross internal floor area: 21,289m2 over two similar three-storey office buildings with rooftop plantrooms