Yes, all government documents created in Canada are protected by copyright. Federal, territorial and provincial government documents are protected by Crown copyright and the term of Crown copyright is 50 years after the date of publication.
Municipal government documents are not covered by Crown copyright, but instead fall under the normal copyright term of life of the creator plus 70 years. Check the website of the municipal government whose documents you wish to reproduce to see if they allow for reproduction for educational, non-commercial or research purposes.
For further information on the use of federal government documents that are under Crown copyright see the federal Crown Copyright Request page.
For further information about the use of BC government documents that are under Crown copyright see the provincial Copyright page.