घर, जमीन आदि सम्पत्तियाँ अचल सम्पत्ति कहलाती हैं। इन्हें मुद्रा, सोना, एवं अन्य चल सम्पत्तियों की तरह एक स्थान से दूसरे स्थान पर स्थानान्तरित नहीं किया जा सकता। इसे 'रीयल एस्टेट' या 'वास्तविक सम्पत्ति' भी कहते हैं।

In English common law, real property, real estate, immovable property or, solely in the US and Canada, realty, refers to parcels of land and any associated structures which are the property of a person. In order for a structure to be considered part of the real property, it must be integrated with or affixed to the land. This includes crops, buildings, machinery, wells, dams, ponds, mines, canals, and roads. The term is historic, arising from the now-discontinued form of action, which distinguished between real property disputes and personal property disputes. Personal property, or personalty, was, and continues to be, all property that is not real property.