Many mortgage programs will require a 620 or higher credit score in order to qualify for a loan. Although, FHA loans are available to people with credit scores as low as 580. However, just because you have a 580 credit score doesn’t mean you will automatically qualify. Lenders look at a lot more than just your credit score. You should have a relatively clean credit history over the past 12 months, with no late payments or collections.
To be clear, you don't need a pre-approval to start looking at houses. However, since a pre-approval is essentially the same as a full mortgage approval, just without a specific home in mind, it can be an extremely valuable shopping tool. Specifically, if you submit a pre-approval along with your offer, it tells the seller that you're a serious buyer who is not likely to run into trouble when obtaining financing. One caveat: A pre-approval and pre-qualification are two different things. A pre-qualification is based solely on information you provide and is not a commitment to lend money, therefore it doesn't carry nearly as much weight.
Foreclosure mediation programs have been created by cities, counties, and state governments. A number of local court systems have also created mediation programs that will ensure lenders, banks and homeowners meet with an attorney or professional mediator to explore all solutions to a foreclosure. Learn more on foreclosure mediation programs and whether your state or local government offers one.