We received forms for people who need loans to build or repair their homes from the USDA. You can find the forms 502/504 at http://www.rurdev.usda.gov/wa. I scanned them and they are shown below. (There are 12 pages.)
There are some loans, for very low income, there are some grants. Grants do not have to be repaid by the recipient as long as they meet the terms of the grant. (If they are having repairs made to their property, that the repairs are made according to the terms of the grant. In other words, if you're getting a grant for a roof, you don't put in a swimming pool.