The underwriting process for a home loan or home mortgage can take as little as a few days but can sometimes take as long as a week or two to complete the underwriting process.
The underwriting process that a mortgage lender performs is to verify your assets to be able to approve the loan and make sure you have the ability to pay the mortgage.
The whole underwriting process should be completed within 2 weeks at most but if not you should contact the mortgage lender or bank to find out what is going on.
If you're approved or denied for the mortgage you should hear from the lender by 2 weeks at most.