OTTAWA — Canadian municipalities issued $8.1 billion worth of building permits in September, according to the latest StatCan data, up 0.4% from August. The national increase was driven by higher construction intentions in Quebec. In the residential sector, the value of building permits edged up 0.3% to $4.9 billion, posting the first increase in four months. Higher construction intentions for multi-family dwellings contributed to the rise. The value of building permits for single-family dwellings was down 1.2% to $2.2 billion in September, the fourth consecutive monthly decrease.