Cost study: Phoenix Natural Gas HQ | Features

Phoenix Natural Gas final cost plan
	Actual construction cost
Trade Package	Totals	£/m2	%	Specification
Piling	£75,461	£15.80	1.49	driven deep-pile foundations
Enabling works	£261,000	£54.65	5.15	brownfield site reclamation
Superstructure	£511,250	£107.05	10.09	in-situ concrete frame on a 7.5 m2 grid, with self-finished precast concrete coffered floor planks
Lift installation	£59,448	£12.45	1.17	two 8-person 630 kg lifts
Cladding/glazing	£876,135	£183.45	17.29	silver anodised aluminium cladding system with integral fixed horizontal shading and opening windows, incorporating low-emissivity double-glazing
Structural steelwork	£113,155	£23.69	2.23	steel frames for atrium with horizontal steel trusses for curtain walls
Lightning protection	£14,550	£3.05	0.29
Groundworks	£222,500	£46.59	4.39	contaminated fill capped with a gas membrane plus a methane ventilation system
Roof finishes	£134,000	£28.06	2.64	roof membrane bonded and hot applied to a roof screed
M&E installation	£1,337,673	£280.08	26.40	mechanical displacement ventilation with air filtered and cooled by a roof-mounted condenser. Heating by low-pressure hot water radiators at the perimeter and heated floor in the atrium. A heat-recovery plant relaims up to 80% heat from return air in winter. High-efficiency fluorescent lighting incorporating light and presence detection to save energy
Metalwork	£73,745	£15.44	1.46
Raised flooring	£162,039	£33.93	3.20	full-access raised floors in offices provide a clear floor void of 450 mm to house flood wiring and supply air plenum
Internal glazing	£47,706	£9.99	0.94
Internal partition/drylining	£123,000	£25.75	2.43
Internal joinery	£142,665	£29.87	2.82
Fittings	-	-	-
Screeds	£36,000	£7.54	0.71
Ceramic floor and wall tiles	£29,572	£6.19	0.58
Landscaping	£20,027	£4.19	0.40
Decorations	£73,730	£15.44	1.46
Flooring finishes	£75,750	£15.86	1.50
Blinds	£61,970	£12.98	1.22	internal venetian blinds are manually operated. Fabric blinds to the atrium and entrance area automatically respond to sunlight
Data installation	£49,891	£10.45	0.98
Security	£52,933	£11.08	1.04
AV installation	-	-	-
BMS Enhancement works	-	-	-
Fencing	£3,432	£0.72	0.07
Labour supply	£17,942	£3.76	0.35
Material supply	£3,556	£0.74	0.07
Cleaning	£8,891	£1.86	0.18
Access towers	£4,160	£0.87	0.08
Acoustic boarding	£5,977	£1.25	0.12
Building costs	£4,598,158	£962.76	90.76
Prelims and Pre-commencement fee	£399,626	£83.67	7.89
Prime cost items	£14,623	£3.06	0.29
Contingency expenditure	£53,827	£11.27	1.06
Final account total	£5,066,234	£1,060.77	100.00
4776 m2 total gross internal floor area of offices and cafeteria on three floors, plus open car parking for 153 cars, 22 vans and 14 bicycles