If I land in May/June with my husband, leave him in Canada, go back home and return with children this time next year, will I have to declare tax for 2015 since I become PR?
If I don't have to, when do I declare value of my house back home - in tax application 2016?
And, who does the estimate of your property? Is it real estate agent or value from tax report in home country?
Generally every tax payer would have to declare their overseas assets worth more than $100,000 in their tax returns. Assets would include equities, indebtedness and properties. I suggest you read the CRA website for details.
unless that asset is a property dedicated for personal use (such as a house/apartment), or in use of a business. Foreign property rules are pretty complicated in this regard with no 'yes' or 'no' answer.