Should you apply for a New Credit Card while you're trying to buy a house?Absolutely not! Applying for new credit after you're pre-approved could have a negative impact on your credit score. The best thing you can do is continue to do your job, continue to get paid, and continue to make your scheduled payments on-time. Don't quit your job. I actually had a customer that did this about 10 years ago and "no", he didn't get the house. Don't check your credit. Don't co-sign for somebody else on their debts. Don't buy a new car, or else you may end up living in that car... and Don't change your banks while you're in the pre-approval process. Just don't do anything financially unless your lender recommends or requests it. If your credit score is keeping you from buying a house, a good lender can help you make some good choices to help improve your cred ...