How long is a conventional loan appraisal valid?

No federal rule sets how long a conventional loan appraisal stays valid; the window reflects lender and investor practice. Most lenders treat a mortgage appraisal as current for about four months, and after that period they may require an updated or new appraisal. The lender orders the appraisal, and the borrower typically pays for it, with a copy provided no later than three days before closing.