The inclusion of air-conditioner platforms in the saleable area of units at the Sino Land-led consortium's Island Resort in Siu Sai Wan has renewed concerns about inadequate regulatory controls on residential sales.
Surveyors said such an inclusion was unusual and it could confuse consumers about the efficiency ratio of the units and the effective selling prices.
They said it might be necessary to review the definition of saleable area if other developers followed suit.
'It is rare that a developer builds a platform to install air-conditioners in a mass housing project,' said Tony Tse Wai-chuen, chairman of the Hong Kong Institute of Surveyors' general practice committee.
Air-conditioner platforms were usually seen in houses or luxury flats at least 1,500 square feet in size.
Those units had a centralised air-conditioning system and needed a room to install the related facilities, Mr Tse said.