Cost study: Sustainable low-energy housing | Features

Elemental cost analysis
	Total cost (£)	Cost per unit (£)	% of total cost
Site clearance and demolition	34 396	2 150	4.32
Substructure	45 872	2 867	5.76
Superstructure
Frame	164 914	10 307	20.72
Upper floors	4 944	309	0.62
Roof	46 672	2 917	5.87
Stairs	22 889	1 431	2.88
External walls	44 222	2 764	5.56
Windows and external doors	60 163	3 760	7.56
Internal walls and partitions	24 918	1 557	3.13
Internal doors	31 553	1 972	3.97
Internal finishes
Wall finishes	16 270	1 017	2.04
Floor finishes	16 872	1 055	2.12
Ceiling finishes	8 771	548	1.10
Decoration	6 835	427	0.86
Fittings, fixtures and furnishings	6 080	380	0.76
M&E installation
Sanitary appliances	6 835	427	0.86
Water installations	37 086	2 318	4.66
Space heating and air treatment	54 167	3 385	6.81
Ventilating systems	18 891	1 181	2.37
Electrical installations	18 822	1 176	2.37
Communication installations	8 559	535	1.08
Builder’s work in connection with services	175	11	0.02
Total building	679 906	42 494	85.44
Site works	37 273	2 330	4.68
Drainage	9 697	606	1.22
External services	19 394	1 212	2.44
Total construction	746 270	46 642	93.78
Preliminaries	49 460	3 091	6.22
Total cost	795 730	49 733	100