The FHA 203(k), sometimes called a rehab loan, renovation mortgage, or Section 203(k) loan, is backed by the Federal Housing Administration (FHA) and allows borrowers to finance both the purchase (or refinance) of a home andits improvement costs into a single mortgage. That means you can roll the cost of needed repairs, updates, or upgrades into your monthly mortgage payment — often at a more favorable rate than a personal loan or credit card.