Property developers were granted at least 188,600 square metres in extra gross floor area over the past five years by incorporating so-called 'green' features, such as balconies, bigger mail delivery rooms and wider corridors, legislators were told yesterday. But the total land premium incurred by the government was only $443 million because the majority of the projects did not have to pay for the extra floor space. 'Everyone can tell a huge amount of revenue is forgone here. There is a huge loophole here; the situation is totally unacceptable,' said Democratic Party chairman Lee Wing-tat. Secretary for Housing, Planning and Lands Michael Suen Ming-yeung said no premium was payable on 'green features' that did not involve the exclusive use of individual flat owners. The Buildings Department earlier said that since the policy's implementation in February 2001, a total of 288 residential projects had adopted it, with 91 per cent adding balconies, 65 per cent providing utility platforms - which are small balconies - and 44 per cent including large lobbies and wide corridors. In a written reply to Civic Party legislator Fernando Cheung Chiu-hung, Mr Suen said 117 residential projects with 'green' features had been completed, but only 58 paid premiums, totalling $443 million. Mr Suen refused to assess the market value of the 188,600 square metres in exempted floor area granted under the policy, saying it would be inappropriate. But Mr Lee said the government should release all relevant information and vowed he would pursue the issue in the Legislative Council.