Hi
Thanks for the replies.But I think my question was not very clear reagrding real estate /home for non resident Canadians:
Below site says
steveorealestate.com/PDF/oct03_tax_guide_ind.pdf
I am not understanding it fully,so I am re reading and trying again

The above link only tells you what tax obligation when you sell or rent out your real property while you are non resident of Canada for tax purposes. It did not mentioned that you have to pay double taxation when you move to your Canadian house permanently!
What is the status of your house? If it is rented out and you are non-resident of Canada, you should be filing the NR6, withhold 25% of your rental income and remit to CRA and file a tax return...; If you still keep it as a home, you may be consider as a "resident" for tax purposes!