Ideally, at least 3 months prior to target list date, and at least 4 months prior to when you need to close on the sale, although it depends on how long it takes homes to close in your market. You'll need time to prep and make any necessary repairs or improvements, put your belongings in storage, and get the house show-ready. If your timing is more flexible, 6 months or longer can be a smart timeframe. It gives you plenty of time to find and compare agents, spread out prep work, and plan the ideal time to hit the market for the best results.