If you can’t find any records online, you’ll need to contact your county clerk’s office to do further research. They should have property records on file, or can at least point you in the right direction of who to contact. You can also speak with your neighbors about when their houses were built because they were likely built around the same time.

You can be present during a home appraisal, but it’s best to stay out of the appraiser’s way. Make yourself available, but don’t engage or interrupt, and don’t discuss value or your target sales price. If possible, have your agent present in the house instead of being present yourself.

While there’s technically no limit to the dollar amount you can borrow for a home addition, the standard limit is around 80% of the value the addition is expected to add to your home. That means you could feasibly borrow up to $80,000 if an appraiser determines that the addition or bump out will add $100,000 in value to your property. You might also be limited by your debt-to-income ratio or credit score.

An FHA appraisal is valid for 180 days from the effective date of the report. In some cases, you can have the appraisal recertified if you make your request before the original expires so that you still may obtain an FHA loan. If approved, your appraisal update is valid for one year.