OFFICE rental in Central and Admiralty increased by 3.2 per cent to $59.89 per sq ft in November, making a total rise of 28 per cent in the first 11 months this year. According to the latest report of City Property Consultants, leasing activities were stable last month. Vacancy in Central and Admiralty fell from 1.9 per cent to 1.4 per cent, representing 192,600 sq ft of unoccupied space. In Wan Chai and Causeway Bay, office rentals rose 2.5 per cent to $44.10, making a total increase of 26.2 per cent from January to November. Vacancy in the district jumped from 3.2 per cent to four per cent, with 331,300 sq ft of unoccupied space. The overall average rental for prime office properties on Hong Kong Island surged by 2.9 per cent to $53.92 last month, or a total of 27.2 per cent for the first 11 months. Overall vacancy remained unchanged at 2.4 per cent in November. Rental at Exchange Square was $77, compared with a rate of $73.91 quoted for Hong Kong Club Building. Central Building commanded a monthly rental of $67.5, and Jardine House enjoyed a rate of $67. Rents in Pacific Place One, Lippo Centre and Wheelock House were $64, $60 and $53.66, respectively. In Wan Chai, Shui On Centre recorded a rental of $54.55, while Great Eagle Centre saw a rate of $54.44. Rents in Dah Sing Financial Centre, Sun Hung Kai Centre and Convention Plaza were $52.43, $51.14 and $46.71, respectively. Sino Plaza quoted a rate of $44.16, Sunning Plaza reported a rate of $40.75, Windsor House $40, World Trade Centre $39 and National Mutual Centre $37.38.