Most mortgage financing plans provide only permanent financing. That is, the lender will not usually close the loan and release the mortgage proceeds unless the condition and value of the property provide adequate loan security. When rehabilitation is involved, this means that a lender typically requires the improvements to be finished before a long-term mortgage is made.

When a homebuyer wants to purchase a house in need of repair or modernization, the homebuyer usually has to obtain financing first to purchase the dwelling; additional financing to do the rehabilitation construction; and a permanent mortgage when the work is completed to pay off the interim loans with a permanent mortgage. Often the interim financing (the acquisition and construction loans) involves relatively high interest rates and short amortization periods. The Section 203(k) program was designed to address this situation.