I work for a company that is looking to buy all the civic address data for Canada.
I've been Googling around and I have yet to find a solution that is not pay per request.
We need it so that it can be integrated in to an ArcGIS server.
What we want to do with the data is tie to in to a Geodatabase where people will be able to search their address and have information pop up about their house. We have the metadata for each location but our current addressing system is partially interpolated/inaccurate (not accurate to the level that we'd like).
We're looking for source data.
Best Answer
This might be better as a wiki.
In British Columbia, civic addressing is maintained by local governments (ie, municipalities and regional districts). Depending on what your use is for the data, they can often be obtained by simple data requests directly to those local governments if it's not publicly accessible already.
The data you get might not be under an open data license like the City of Vancouver, Surrey and maybe Banff, does and some other municipalities.
Most local governments are now sharing their civic address information with the Integrated Cadastral Information Society for their AddressBC database that you can become a member of for a hefty annual fee.
OpenData BC also lists a type of RESTful physical address geocoder service for BC that might be useful too.