Minimum credit score or income to assume a family mortgage and will the interest rate change?

Consider taking the mortgage "subject-to", with no cost or interest rate or payment change, and no qualifying. Contact me at primefinancial@frontier.com for details.

The only way to assume a loan is through the existing lender. Assumption rules are lender dependent, so you really need to talk to the existing lender to see what their guidelines are and if they will let you assume the loan. The rate wouldn't change... the whole idea of assuming a loan is to take over the loan. Rate, balance, remaining term, etc will all stay the same. One more item, not all loans are assumable...