Cost model: Prefabrication and preassembly | Features

Student accommodation
	Element cost (£)	cost/m2 gfa (£)	% of total cost
Substructure	1640	72.29	7.22
Piling, deep strip foundations and ground-bearing slab; reduced level dig, disposal
item @ 1,229,000
Modules	13,210	582.79	58.18
Bedroom modules, fully furnished, complete with en-suite bathroom, including all services to final connections with below-ground installation
750 @ 10,500
Kitchen modules, fully fitted, including all services to final connections with below-ground installation
125 @ 13,500
Stair modules
30 @ 11,500
Envelope	4130	182.28	18.20
External walls – terracotta rainscreen; including allowances for framing and interfaces with modules
17,000 m2 @ 140
Roof – timber structure, roof tiles, rainwater goods
6250 m2 @ 115
Joinery generally	190	8.24	0.82
Internal and external doors, canopies
item @ 140,000
Finishes generally	1520	66.94	6.68
Wall, floor and ceiling finishes to corridors only
item @ 88,000
Ancillary buildings	1400	61.77	6.17
Allowance for conventionally constructed amenities buildings
item @ 1,050,000
Contingencies	620	27.35	2.73
Allowance based on 3%
item @ 465,000
Total construction cost – building only	22,710	1001.66	100
Reported costs are current in 1st quarter 2002, based on a location in south-east England. Preliminaries are included in the rates. The costs exclude site remediation costs, infrastructure and external works, professional fees and VAT

Amphion project
	Element cost (£)	cost/m2 gfa (£)	% of total cost
Substructure	4500	53.29	9.37
Strip foundations and ground bearing slab; reduced level dig, disposal
item @ 162,000
Frame, upper floors and partitions	9110	107.93	18.97
Timber frame panels, external wall panels, upper floors, roof structure and internal partitions
item @ 328,100
Roof	2840	33.65	5.91
Roof coverings; concrete roof tiles, rainwater goods
item @ 102,300
External wall cladding	5630	66.71	11.73
Single skin outer brick wall
item @ 202,800
Joinery generally	6560	77.73	13.66
Stairs
item @ 36,200
Windows and external doors; timber; site finished
item @ 150,100
Internal doors
item @ 50,000
Finishes generally	8910	105.49	18.54
Wall, floor and ceiling finishes
item @ 320,700
Furniture and fittings	1540	18.19	3.20
Fixtures and fittings generally
item @ 55,300
Services generally	8940	105.92	18.62
Sanitary fittings
item @ 33,800
Plumbing
item @ 89,800
Heating and ventilation
item @ 126,500
Electrical installation
item @ 71,900
Total construction cost – building only	48,030	568.91	100
External works	11,140	131.91	–
Drainage, service trenches, lighting, drives, parking areas and paved areas, soft landscape, screen walls and fencing
item @ 401,000
Adoptable works	6970	82.57	–
Roads, footpaths, sewers, street lighting and street furniture
item @ 251,000
Service mains and connections	3830	45.39	–
item @ 138,000
Overall construction cost	69,970	828.78	–
Reported costs are current in 1st quarter 2002, based on a location in southern England. Allowances for preliminaries and contingencies are included in the rates. The costs exclude site preparation costs, off-site works including services diversions, surveys, professional fees and VAT