Colliers won all three awards at the Royal Institution of Chartered Surveyors NZ seminar and awards last night, where a speaker priced Christchurch's CBD rebuild at $30 billion.

A potential rise in office rents may push future construction projects - Colliers' monthly research report.

Empty office space abounds on Auckland’s North Shore and in the CBD fringe area of Grafton, with Wellington occupancy also weakened.

The latest research from property company Colliers showed that office vacancy on the North Shore had hit 15.78% while Albany offices were 10.90% empty.

Overall however the North Shore recorded a decline in office vacancy to 11.83% thanks to Takapuna offices gaining more tenants improving vacancy in that area from 12.35% in March to 10.73% in September.

More offices in Auckland are soon to be sitting empty according to some industry experts who say the worst is still to come for commercial vacancy.

Research from Colliers shows office vacancy in the Auckland CBD has risen to 8.4% in June 2009 from 7.7% six months prior.

Colliers director of research and consulting Alan McMahon told an audience at a Property Institute of New Zealand breakfast event this morning that tougher times are still ahead.

“Office vacancy in the Auckland CBD will peak at 15% in 2011,” Mr McMahon said.