Yes, you can get a mortgage in retirement, even if your only income comes from Social Security retirement benefits or other types of Social Security. Retired individuals and others who live on a fixed income can sometimes have a more difficult time qualifying for a mortgage if their income is too low relative to the amount of debt they'd be taking on. But if you have a sufficient income that comes from an acceptable source, lenders can't turn you down simply because of your age or the fact that you receive Social Security.