You have lived "separate and apart" for a year having decided the marriage is over. Living "separate and apart" does not necessarily mean living in separate homes. You can live separate and apart while sharing a home.
It is also possible to claim that although you only recently moved out and live in a different home, the marriage broke down and was essentially over at some time in the past, regardless of living arrangements
You do not need a separation agreement to prove separation, but it may useful if things get hostile.
Your Separation Agreement will help you resolve property, custody and support matters. However you do not need a legal document that says you are separated, as there is no "legal separation" in Canada.
Divorce in Canada is controlled by the Click here Divorce Act
However each province also has its own Family Law Acts, which will affect your divorce in some manner.
How Do You Determine When The One Year Waiting Period Started And Ends?
The clock starts running when you decide that the marriage is over and there can be no reconciliation. You do not have to be physically living in separate homes to be "separated."
Your separation can mean living in separate bedrooms, or as one of you moving out and living elsewhere.
Common Steps To Divorce.
Decide to Divorce.
Research the rules by browsing CanLaw; it is rich with free information.