For homebuyers, the questions to ask at an open house are really the same as those you should ask when looking at any home. You should get as much information as possible about the condition of the home, how long it's been on the market, any renovations that have been done, and any significant issues that the home has had. It's also good to get an idea of how many offers the listing agent has, so you'll know how competitive the market is for that home.