If you get pre-qualified to buy a house how much time does that give you.?

A pre-qual is normally good for 30 days. I think it actually depends on each specific lender as opposed to any state requirements. I've seen some pre-quals last longer than 30 days so I let's say 30-90 just to cover all the bases. :)

Pre-qualified means as long as all the information you gave is true, here is most your monthly payment can be. Translating that into the amount you can spend on a house depends on interest rates.

If rates don't move, the pre-qual is probably good indefinitely. If rates change or your income/financial picture changes, you better do it again.

It must depend on the state because it is 90 days where I live...call any real estate office and they will tell you or any bank loan officer...