The 2003/2004 cost for a National Standard Art Gallery was in the range £2,065/m 2 to £2,550/m 2. Pallant House Gallery included the demolition of an existing property adjacent to the Grade I-listed building, with the need for temporary works to maintain the existing structures. Archaeological works formed part of the brief once the site for the new extension was cleared, and Pallant House itself needed additional works to render it structurally sound. Therefore the tender price of £2,480/m 2 represented a keen and competitive offer within the expected range and allowing for regional variations.
Certain parts of the structure were designed to high embodiedenergy characteristics and this led to a concrete-framed structure with a pitched, in situ concrete roof overlaid with a copper roof. The tender was based on full Bills of Quantities with a design which had been developed to provide the tenderers with details at scales of 1:25 and 1:5. There was a mid-tender interview process to better assure an understanding of the project requirements. During the tender period some changes were required to achieve planning consent, and the principal redesign needed was included as part of the tender accepted. The use of energy piles was adopted to reduce the annual running costs and keep within the design capacity at an acceptable cost of the basic utility services capacity which was available. The design process for the main fit-out evolved during the construction period and a process of tendering the main provisional sums was adopted with specialists.
David Bailey, Davis Langdon
Cost per m (£)
SUPERSTRUCTURE Upper floors 52.68 2.12 Roof 232.81 Rooflights 38.10 Staircases 73.66 External walls 132.54 5.34 Windows 16.74 External doors 51.93 2.09 Internal walls and partitions 43.82 1.77 Internal doors 63.49 2.56
GROUP ELEMENT TOTAL 705.77 28.46
INTERNAL FINISHES Wall finishes 55.10 2.22 Floor finishes 69.79 2.81 Ceiling finishes 33.54 1.35
GROUP ELEMENT TOTAL 158.43 6.39
FITTINGS AND FURNITURE 186.92 7.54
SERVICES Sanitary appliances 7.60 0.31 Services equipment 7.45 0.30 Disposal installations 39.83 1.61 Water installations 23.76 0.96 Heating/air treatment 283.67 11.44 Electrical services 194.83 7.86 Lift and conveyor installations 24.08 Protective installations 66.98 Communication installations 31.32 Builders' work 49.15 1.98
GROUP ELEMENT TOTAL 728.67 29.38
EXTERNAL WORKS 75.50 3.04
PRELIMINARIES AND 327.51 13.20
INSURANCE TOTAL 2,480.30