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Residential vs commercial
Key differencesÌýÌý
ElementResidentialCommercial
Average floorplate (gross internal area above ground)560-790m21,500-3,000m2
Wall:floor ratio (above ground)0.50-0.700.32-0.63 (usually %3E0.50)
Floor:floor heights (above ground)2.90-3.15m3.65-4.15m
Facade strategyUnitised curtain walling, 60:40 mix solid panels/ vision glass including openable windows Unitised externally ventilated double wall facades (complexity varies)
Structural frame and core material selectionFrame-concrete,core-concreteFrame-steel, core-steel or concrete (central or offset)
Location factors
Inner London1
Outer London0.96
South-east0.94
South-west0.9
East Midlands0.9
West Midlands0.9
East Anglia0.9
Yorkshire & Humberside0.91
North-west0.9
Northern0.91
Scotland0.92
Wales0.88