The word jumbo describes the size of the loan, not the size of the house — although in practice the two go together. A jumbo loan can finance a luxury home, a larger family home in a high-cost neighborhood, or a purchase where the buyer simply borrows more than the conforming limit allows. It is still a mortgage like any other: the borrower makes monthly payments of principal and interest, the home secures the loan, and the same consumer protections apply. What changes is the underwriting: because the lender carries more risk on a larger loan, it looks harder at credit, income, assets, and reserves before it says yes.