Cost study: Scottish gas headquarters | Features

Elemental cost breakdown, Scottish Gas HQ
Office building, including fit-out, of 10,568 m² gross internal floor area, comprising four storeys and basement
ELEMENT	Total cost £	Cost £/m² gifa	% split
SUBSTRUCTURE	489,000	46.03	2.39	rotary and continuous flight auger piles; ground beams; retaining wall; reinforced concrete basement slab
SUPERSTRUCTURE
Frame and upper floors	2,598,000	244.54	12.67	fully exposed insitu reinforced concrete frame; enhanced finish; coffered floor slabs
Roof	376,500	35.44	1.84	insitu reinforced concrete slab; Sarnafil roof covering; soffit to external
Stairs	341,700	32.16	1.67	precast concrete stair cores; feature atrium staircase
External walls	2,089,900	196.71	10.19	aluminium curtain walling; horizontal sun-screens
Windows and external doors	73,600	6.93	0.36	revolving main entrance door; pass doors; emergency exit doors
Internal walls and partitions	971,700	91.46	4.74	core fit-out including cubicles; tenant system partitions; smoke curtains
Internal doors	291,900	27.48	1.42	timber laminate doors to cores; steel doors to plant areas
FINISHES
Wall finishes	89,400	8.41	0.44	emulsion paint; tiled splashbacks
Floor finishes	727,500	68.48	3.55	raised access floors; fixing of diffusers, carpet tiles; granite to reception
Ceiling finishes	77,400	7.29	0.38	ceiling finishes to the core areas
Fittings and furnishings	367,200	34.56	1.79	blinds; signage; integrated furniture; mobile racking; kiosk
SERVICES
Sanitary appliances	144,400	13.59	0.70
Special equipment	454,000	42.73	2.21	kitchen equipment
Disposal installations	94,500	8.89	0.46	syphonic drainage and waste services
Water installations	108,100	10.18	0.53	for toilet cores, vending, shower facilities and kitchen areas
Heat source	–	0.00	0.00	bought as part of package plant room
Space heating and ventilation systems	2,131,000	200.58	10.40	displacement ventilation through plenum floor; electric trench heating to glazed areas; ventilating systems passive chilled beams; fan coil units to restaurant areas; stand-alone cooling to communications rooms
Electrical installations	2,168,000	204.07	10.58	HV/LV substation; landlord’s and small power to desks; lighting; emergency lighting; generator back-up; uninterrupted power supply; sound insulation to generator room
Gas installations	14,800	1.39	0.07
Lift and conveyor installations	340,800	32.08	1.66	three passenger lifts; one goods lift
Protective installations	72,900	6.86	0.36	lightning protection; earthing
Communications installations	788,300	74.20	3.85	fire alarm and voice evacuation; structured cabling; security; data cabling to desks
Special installations	461,800	43.47	2.25	building management system
EXTERNAL WORKS
Site works	587,000	55.25	2.86	external car park; extensive soft landscaping; granite plaza area; benches
Drainage	150,600	14.18	0.73	below ground floor slab and site area
External services	131,300	12.36	0.64
Minor building works	3,800	0.36	0.02
Trade contractor preliminaries	1,930,900	181.75	9.42	allowances extracted from trade contractor packages
CM staff, organisation and fees	2,423,300	228.10	11.82
TOTAL	20,499,300	1929.53	100.00
Notes Figures shown cover whole project costs including shell-and-core works, landlord’s category A fit-out, tenant’s category A enhancements and tenant’s category B fit-out and external works. Cost breakdown calculated by converting final accounts, or anticipated final accounts, of trade packages into elemental form.
Trade packages were tendered between February 2002 and March 2003