Economists had expected a gain of six per cent, according to Thomson Reuters.
Statistics Canada says the increase resulted mostly from higher construction intentions for both non-residential and residential buildings in Ontario.
It says the value of non-residential building permits rose 23.9 per cent to $3.1 billion in September — the fifth increase in six months.
The federal agency says six provinces posted higher non-residential construction intentions, led by Ontario.
On the residential side, the agency says the value of permits rose 6.1 per cent to $4.4 billion in September. It says seven provinces — again led by Ontario — posted gains, while Alberta, Saskatchewan and Manitoba had declines.