The Buildings Department is implementing a seven-year enforcement programme to clear 12 000 illegal rooftop structures on 4 500 single-staircase buildings,starting from 2001-02.

• 建设部现正实施七年计划，由二零零一至零二年度开始，在4500幢单梯建筑物，清拆违例天台搭建物12000个。