The development minister has floated the idea of building flats on land in country parks, questioning whether such a controversial option was "untouchable and unmentionable".
The remarks by Paul Chan Mo-po are a radical departure from Leung Chun-ying's pledge when he was running for election as chief executive that country parks "should be protected from development as far as possible", a vow he shared in an interview with the South China Morning Post almost two years ago.
Laws stipulate that country parks are designated for the purposes of nature conservation, countryside recreation and outdoor education.
Chan's suggestion came after the committee devising a long-term housing strategy for Hong Kong last week unveiled a proposal to build 470,000 flats in the next 10 years, a target criticised as unattainable given the limited land supply.
Chan wrote on his blog yesterday that society should discuss and explore the possibility of developing country parks - an idea he said had recently been raised in various seminars - as more land would be needed to reach the housing target.
"During the exchange, someone mentioned that 70 per cent of Hong Kong's land is country parks, [and] in face of a shortage of land supply and a big housing demand ... can they not be developed at all?
"The development of country parks was seen as a restricted area, if not a taboo. Is it still completely untouchable and unmentionable today?" Chan asked.
Giving an example, he said some people believed development on Lantau, which is mostly country park, should not be limited to the island's north.
Criticising Chan's remarks, environmental activist Roy Tam Hoi-pong, of campaign group Green Sense, said the government should instead review immigration schemes aimed at attracting mainlanders, otherwise an influx of hundreds of thousands of people in the coming decade would make housing demands unbearable.
View Larger Map 
Meanwhile, the secretary for transport and housing, Professor Anthony Cheung Bing-leung, said building more flats had to take priority over increasing their size, although housing capacity and quality were mentioned in the committee's proposal.
"If you can't even increase the quantity, how do you increase [flat] areas?" Cheung said on TVB Jade's On the Record.
However, he hoped that the Housing Authority would consider building bigger public flats in more remote areas, conceding that Hong Kong fell behind some less developed countries in terms of living space per capita.
Lau Ping-cheung, Leung's housing adviser and a member of the committee, suggested vacant industrial buildings be turned into interim housing for people waiting for public flats.
Fellow committee member Fred Li Wah-ming said old public flats to be vacated for redevelopment should be converted into interim housing for the 230,000 applicants in the queue.