What do I need to get my first mortgage? A good mortgage broker along with picture ID, proof of income, and proof of downpayment When is the right time to start applying for a mortgage? 6 months prior to your plan to purchase. This way any issues can be dealt with or any information that is required can be acquired. Can I get pre-approved for a mortgage before finding the home I want to buy? Yes. A Pre-approved mortgage can give you an idea on what amount that you can qualify for on a mortgage. What Is CMHC? CMHC, Sagen and Canada Guaranty are mortgage lenders’ default insurers. They insure lenders against losses in case of default on a mortgage. This insurance is required when a buyer is putting down less than 20% of the purchase price for a home they intend to live in.