This homeownership.ca post tells why an understanding of underwriting is a key advantage for home buyers seeking a mortgage.  Work with a mortgage professional to get pre-approved for a mortgage so you know your price range and can make an offer instantly.  The pre-approval process determines the size of mortgage and type of home you can afford.  You will need to assemble your credit report and other documentation (financial and employment history, creditworthiness, income) the lender or mortgage insurer needs to process the application.  The documentation required varies depending on individual circumstances.  For example, self-employed applicants should be prepared to prove a consistent level of income over at least two years.  To read more click here.