| Cost breakdown |
| | Element cost (£) | Cost/m2 gfa (£) | % of total cost |
| Substructure | 32,200 | 27.4 | 3.98 |
| Site clearance | | Item @ | £1,500 |
| Foundations and ground slab: insitu concrete ground beams, masonry walls below damp-proof course, damp-proof coure, contractor-designed precast concrete floor units | | 410 m2 @ | £70 |
| Extra over for lift pit construction | | Item @ | £2,000 |
| Upper floors | 18,200 | 15.49 | 2.25 |
| Contractor-designed precast concrete floor units | | 824 m2 @ | £20 |
| Balconies: contractor-designed precast concrete units | | 35 m2 @ | £50 |
| Extra over for circular columns | | 1030 m @ | £30 |
| Allowance for structural steel truss to suspended section of main concourse floor | | Item @ | £100 000 |
| Roof | 32,700 | 27.83 | 4.05 |
| Softwood trussed rafters: 150 mm insulation quilt | | 395 m2 @ | £18 |
| Clay pantiles: softwood battens, reinforced felt underlay | | 435 m2 @ | £25 |
| Extra for hips, ridges, and so on, to hipped roofs | | 175 m @ | £25 |
| Perimeter treatment to eaves, soffits and verges | | 120 m @ | £15 |
| Roof finishes to balconies: concrete pavers, mastic asphalt, warm deck roof insulation, vapour barrier, insulation to soffit of slab | | 55 m2 @ | £60 |
| Handrails to terraces and balconies | | 45 m @ | £100 |
| Rainwater goods: PVCu gutters and accessories | | 125 m @ | £6 |
| Stairs | 13,800 | 11.74 | 1.71 |
| Precast concrete stairs and half-landing: rise 2.70m | | 3 @ | £4,000 |
| Softwood spiral staircase: overall rise 2.70m | | 1 @ | £1,000 |
| Access stair to roof void | | Item @ | £800 |
| External walls | 72,000 | 61.28 | 8.91 |
| Cavity walls: two skins blockwork, insulated cavity, render, masonry paint finish to walling at ground level only | | 155 m2 @ | £80 |
| Cavity walls: London stock facing bricks, 150mm medium-density blockwork inner skin, insulated cavity | | 485 m2 @ | £75 |
| Reconstituted stone string-courses, copings and sills | | 330 m @ | £40 |
| Allowance for additional architectural detailing | | Item @ | £10,000 |
| Windows and external doors | 71,600 | 60.94 | 8.86 |
| PVCu windows and screens: double-glazed sealed units, lintels, cavity trays, ironmongery, window boards, and so on | | 215 m2 @ | £230 |
| Extra for doors in glazed screens to balconies | | 28 @ | £500 |
| Glazed entrance screen and door: hardwood frame | | 15 m2 @ | £500 |
| Window safety rails: powder-coated mild steel | | 6 m @ | £100 |
| Internal walls and partitions | 39,400 | 33.53 | 4.88 |
| Party walls: 215mm solid dense concrete blockwork | | 550 m2 @ | £30 |
| Blockwork partitions: average 140mm thick | | 170 m2 @ | £18 |
| Timber stud partitions: 100 mm thick, quilt insulation | | 260 m2 @ | £30 |
| Glazed screen to stair lobbies: single-leaf panelled door | | 4 @ | £3,000 |
| Internal doors | 32,100 | 27.32 | 3.97 |
| Entrance doors: single-leaf, frame, ironmongery | | 12 @ | £520 |
| Fire-rated doors: single-leaf, frame, ironmongery | | 41 @ | £325 |
| Unrated doors: single-leaf, frame, ironmongery | | 50 @ | £250 |
| Wall finishes | 25,600 | 21.79 | 3.17 |
| Plasterboard drylining to blockwork | | 860 m2 @ | £6 |
| Ceramic tiling to kitchens and bathrooms | | 190 m2 @ | £50 |
| Decorations: two coats emulsion paint | | 2950 m2 @ | £2 |
| Allowance for picture rails and trims | | Item @ | £5,000 |
| Floor finishes | 28,400 | 24.17 | 3.51 |
| Proprietary floating floor system: 22 mm chipboard, foam-backed softwood battens | | 920 m2 @ | £16 |
| Sand/cement screed: mesh reinforcement, resilient closed-cell foam layer | | 105 m2 @ | £10 |
| Ceramic floor tiles to kichens | | 100 m2 @ | £50 |
| Carpet to communal lobbies | | 60 m2 @ | £35 |
| Moulded softwood skirtings | | 970 m @ | £4 |
| Cove ceramic skirting to kitchens | | 110 m @ | £15 |
| Ceiling finishes | 11,100 | 9.45 | 1.37 |
| Two layers plasterboard: two coats emulsion paint | | 820 m2 @ | £10 |
| Coving to reception rooms and bedrooms | | 970 m @ | £3 |
| Furniture and fittings | 180,900 | 153.96 | 22.39 |
| Allowance for fully-fitted kitchen to developer's specification: units, oven, hob, extractor hood, mircrowave, fridge, freezer, dishwasher, washer-drier and waste disposal | | 12 @ | £12,000 |
| Allowance for built-in bedroom furniture | | 12 @ | £3,000 |
| Bathroom mirrors | | 24 @ | £25 |
| Matwell to communal lobby | | Item @ | £300 |
| Sanitary fittings | 42,000 | 35.74 | 5.2 |
| Allowance for sanitary fittings: fully-fitted bathroom/shower room to developer's specification, two WCs, two wash-hand basins, bath, shower, including all fixtures and fittings | | 12 @ | £3,500 |
| Disposal installations | 5,100 | 4.34 | 0.63 |
| PVCu rainwater downpipes and fittings | | Item @ | £1,000 |
| PVCu soil and vent pipework and fittings | | 1175 m2 @ | £13.50 |
| Water installations | 15,900 | 13.53 | 1.97 |
| Hot and cold water supply: dedicated mains service to each dwelling, direct mains feed to all cold water outlets, calorifier, pipework and fittings | | 1175 m2 @ | £13.50 |
| Space heating and ventilation | 45,900 | 39.06 | 5.68 |
| Low-pressure hot-water central heating sytem: fan-assisted blanced-flue boiler, wall-mounted steel-panel radiators, single-zone thermostatic control | | 1175 m2 @ | £35 |
| Extract fans and ductwork to kitchens and bathrooms | | 19 @ | £250 |
| Electrical installations | 29,400 | 25.02 | 3.64 |
| Mains and sub-mains installation | | Item @ | £5,000 |
| Small power installation to apartments | | 1115 m2 @ | £9 |
| Lighting and luminaires to apartments | | 1115 m2 @ | £12 |
| Emergency lighting, lighting and small power to common areas | | Item @ | £1,000 |
| Lift installation | 20,000 | 17.02 | 2.48 |
| Eight-person, 0.4 m/second, electro-hydraulic lift | | Item @ | £20,000 |
| Communicative installations | 17,800 | 15.15 | 2.2 |
| Telephone points | | 24 @ | £50 |
| Socket points for cable-access television | | 24 @ | £250 |
| Mains-operated smoke alarms | | 24 @ | £150 |
| Closed-circuit television entry-phone system | | Item @ | £7,000 |
| Preliminaries and contingencies | 66,900 | 56.94 | 8.28 |
| Management costs, site establishment and supervision, allow 7% | | | £51,900 |
| Contingency sum, allow 2% | | | £15 000 |
| Total construction cost : building only | 808 000 | 687.66 | 100 |
| | | | |
| | Element cost (£) | Cost/m2 gfa (£) | % of total cost |
| Site works | 33,200 | 28.25 | n/a |
| Surface car parking and access roads, coated macadam on granular fill, including allowance for external lighting | | 600 m2 @ | £27 |
| Paths and walkways: brick and block pavers on sand base, kerbs and edgings | | 200 m2 @ | £35 |
| Soft landscaping: imported top soil, cultivate, turf, plants and mature trees | | Item @ | £7,000 |
| Ornamental railings and street furniture | | Item @ | £3,000 |
| Drainage | 15,000 | 12.77 | n/a |
| Clayware and PVCu below-ground drainage | | Item @ | £5,000 |
| Allowance for manholes and inspection chambers | | Item @ | £10,000 |
| External services | 30,000 | 25.53 | n/a |
| Share of costs of extending mains services from site boundary and connection charges | | Item @ | £30,000 |
| Minor building works | 3,500 | 2.98 | n/a |
| Masonry-built bin stores to match main building | | Item @ | £3,500 |
| Preliminaries and contingencies | 7,300 | 6.21 | n/a |
| Management costs, site establishment supervision, allow 7% | | ghjlhjlk | £5,700 |
| Contingency sum, allow 2% | | gl;hk;hkl | £1,600 |
| Total construction cost : external works only | 89,000 | 75.74 | n/a |
| | | | |
| Overall construction cost | 897,000 | 763.4 | n/a |
| | | | |
| | | net extra (saving) cost/m2 gfa (£) | |
| Alternative element specifications | | | |
| (extra over costs are inclusive of preliminaries and contingencies) | | | |
| Substructure | | | |
| Contaminated land: share of site investigation costs - item @ £1500 | | 1.39 | |
| Site clearance: disposal of contaminated waste (assumed 50% normal, 50% polluting). Rate excludes landfill tax - 1000 m3 @ £15 | | 13.91 | |
| Methane gas membrane, laid on hardcore bed and blinding with insitu concrete ground slab - 410 m2 @ £30 | | 3.42 | |
| Extra over for insulation to ground floor slab - 410 m2 @ £6 | | 2.28 | |
| Extra over for piled foundations - 410 m2 @ £95 | | 36.64 | |
| Semi-basement car park of insitu concrete frame and retaining walls complete with drainage and surfacing - 410 m2 @ £205 | | 68.04 | |
| External walls | | | |
| Cavity wall: two-skin blockwork, insulated cavity, Western red cedar weather boarding - 160 m2 @ £78 | | 0.45 | |
| Windows and external doors | | | |
| Softwood windows and screens instead of PVCu - 215 m2 @ £280 | | 9.97 | |
| Hardwood windows and screens instead of PVCu - 215 m2 @ £340 | | 21.94 | |
| Internal walls and partitions | | | |
| Metal stud partitions instead of timber - 260 m2 @ £35 | | 1.21 | |
| Floor finishes | | | |
| Quarry tiles to kitchen instead of ceramic - 100 m2 @ £27 | | -2.13 | |
| Space heating and ventilation | | | |
| Extra over for condensing fan-assisted gas boiler - 12 @ £300 | | 3.51 | |
| Extra over from room thermostats - item @ £2000 | | 1.95 | |
| Communications installations | | | |
| Voice-only entryphone sytsem - item @ £2500 | | -4.38 | |
