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BUILDING STUDY

Cost analysis

DEMOLITIONS

DEMOLITION £25.39/m2

Removal of existing 10-storey apartment building

SUBSTRUCTURE

FOUNDATIONS/SLABS £246.19/m2

Mass-concrete 1500mm-thick raft and hard-hard contiguous secant-piled foundations. 350mm-thick intermediate slabs

SUPERSTRUCTURE

FRAME AND UPPER FLOORS £49.48/m2

rc columns and walls generally 200mm thick. 300mm-thick rc floors with flat soffits

ROOF £104.74/m2

Stainless-steel and mild-steel frame to level 8 penthouse. Cast fire protection to external columns supporting plant areas. Low-reflective stainless-steel sheeting on insulated composite panels to level 8 roof, main cornice at level 7 and projecting bays to level 6. 50mm-thick Portland stone paving, membrane, insulation and screed to falls on all terraces

STAIRCASES £11.96/m2

In-situ rc escape stairs with sealed granolithic treads and risers. Spray- painted metal balustrade and handrail. Cantilevered steel stair with black Hillend Whitstone treads and risers to the main office entrance with timber and glass infill panels on a sprayed metal balustrade

EXTERNAL WALLS £171.13/m2

215mm-thick self-supporting brickwork designed for up to 30mm of vertical movement at the head. Hand-made bricks with stretcher:header ratio of 3:1. Generally 75mm thick. Portland-stone cladding set in 6mm-bead blasted stainless-steel frames to sides and levels 0 and 1. Purbeck limestone sills and copings. Pentilican marble panels supported on stainless-steel brackets to levels 3 and 7 cornices. Bead blasted stainless-steel columns and fascias to bays with solid Portland stone to square columns. Painted render on blockwork to level 7

WINDOWS AND EXTERNAL DOORS £106.60/m2

Solid European oak windows and doors with sealed double-glazed units incorporating Pilkington Audioscreen, bma-finished bronze sub-frames and insulated overpanels. Powder-coated aluminium curtainwalling to level 8 with white baked glass. Automatic sliding doors to levels 7 and 8

INTERNAL WALLS AND PARTITIONS £28.83/m2

Dense concrete block partitions throughout. Insulated cavity walls between apartments

INTERNAL DOORS £50.53/m2

American cherry and burr maple veneered doors to principal rooms. Sprayed timber doors to all other rooms in apartments. Metal fire doors to plant rooms

INTERNAL FINISHES

FLOOR FINISHES £43.80/m2

Allowance for floating battened floor throughout reception rooms and bedrooms. Ceramic tiles to kitchen and secondary bathrooms. 20mm marble slabs to bathrooms. Marble flooring to main rooms by the client. Fully accessible raised floor to level 1 offices

WALL FINISHES £60.88/M2

Painted plaster to all areas. bma bronze cladding to entrance hall columns. Marble and timber panelling to entrance hall

CEILING FINISHES £60.99/m2

grg cornice incorporating air-conditioning grille to all apartments with painted grg ceilings throughout. mdf hinged access panels to apartment hallways below fire-rated ceiling. Perforated metal fully accessible ceiling to level 1 offices set within plaster borders

FITTINGS AND FURNITURE £155.49/m2

Fitted kitchen and utility rooms. Bathroom appliances

SERVICES

SANITARY INSTALLATIONS £64.84/m2

Baths and showers to all bedrooms. Kitchens and utility rooms. wc cubicles to level 1 offices. Provision for future fitting out of ground-floor banking units

MECHANICAL INSTALLATIONS £198.24/m2

Full vav air-conditioning to apartments. Individual plant rooms for each apartment served by roof and basement plant. Fan-coil air-conditioning to level 1 offices. Mechanical extract to car park

ELECTRICAL INSTALLATION £157.47/m2

Power and lighting, tv communication and sound system wire-ways. Under- floor trunking and floor outlets. External lighting and fibre-optics to canopies. Trace heating to hw pipework and under-floor heating to bathrooms

LIFT INSTALLATION £36.53/m2

Two 13-person fireman's traction lifts serving all floors. Two 13-person passenger lifts serving all floors. One eight-person glass lift serving ground and first-floor offices

EXTERNAL WORKS

EXTERNAL WORKS £199,300

Cost summary

Cost per m2 Per cent

(£) of total

DEMOLITION 25.39 1.61

SUBSTRUCTURE 246.19 15.65

SUPERSTRUCTURE

Frame and upper floors 49.48 3.15

Roof 104.74 6.66

Staircases 11.96 0.77

External walls 171.13 10.88

Windows and external doors 106.60 6.78

Internal walls and partitions 28.83 1.83

Internal doors 50.53 3.21

Group element total 523.27 33.28

INTERNAL FINISHES

Floor finishes 43.80 2.78

Wall finishes 60.88 3.87

Ceiling finishes 60.99 3.88

Group element total 165.67 10.53

FITTINGS AND FURNITURE 155.49 9.88

SERVICES

Sanitary installation 64.84 4.12

Mechanical installation 198.24 12.60

Electrical installation 157.47 10.01

Lift and conveyor installations 36.53 2.32

Group element total 457.08 29.05

Total 1573.09 100.00

All costs inclusive of preliminaries and builder's work in connection

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