You have to follow the below procedures:
1. Housing Transfer Declaration should first be notarized by a notary public or a lawyer;
2. Secondly be legalized by the local provincial authorities:
Address of authentication Office of B. C. Province:
Order in Council Administration Ministry of Attorney General
Room 208A 553 Superior St.Victoria, British Columbia, V8V 1X4
Tel: 250-387-4376 Fax: 250-387-4349
3. Finally be authenticated by the Chinese Consulate-General in Vancouver.

Note: Documents originating from areas other than Province of B. C. and the Territory of Yukon should be authenticated by the Chinese Embassy in Ottawa, the Consulate General in Toronto or in Calgary.

$60 per document for documents concerning Housing Transfer Declaration