Normally residential mortgages are not closed-end mortgages. By definition, closed-end mortgages cannot be prepaid but most residential mortgages in the U.S. do have a prepayment clause that allows the borrower to prepay the balance of the mortgage (perhaps by paying a penalty).

In Canada, residential Mortgages could be open or closed depending on the need of the client. In some cases where the client is unsure what the time frame would be for them to repay the mortgage and does not want to get stuck with early repayment penalties, I suggest them an open mortgage.

But if they are pretty much sure that they are okay to go the full term of the mortgage 1 - 5 years, then a closed is preferred as to give client the advantage of a better interest rate.