Look at these two items in the same kitchen. Built-in cabinets, and a cart on wheels. Both are useful. Both may be heavy. But they are not necessarily classified the same way. The cart is ordinarily personal property. It can be moved without becoming part of the building. The cabinets are ordinarily fixtures, incorporated into the kitchen. A fixture began as personal property but is treated as part of the real estate. Attachment and adaptation matter. So do intention, the parties' relationship, and their agreement. Do not decide from weight or appearance alone. Quick check: which item is more likely a fixture? The built-in cabinets. The key is how the item is incorporated into the property, considered with the facts and agreement.