Why Is a Car Different From a House in Law? One of Them Moves

The law separates property into two categories that are treated quite differently. Land, together with buildings and things permanently attached to it, forms one category, historically called real property because the remedy for wrongful dispossession was recovery of the thing itself. Everything else forms the other, historically called personal property because the remedy was an action against the person for damages rather than recovery. The distinction arose from the forms of action available in medieval courts, survived long after those forms were abolished, and still governs a surprising amount of modern law.

Consequences follow from which side of the line something falls:

• •Land transfers require formality and registration, goods do not
• •Ownership of goods passes by delivery or by contract alone
• •Inheritance rules historically differed sharply between the two
• •Tax treatment differs, including on transfer and on death
• •Security over land and over goods uses different mechanisms
• •Limitation periods and remedies differ

The most litigated question is when an object attached to land stops being a separate thing and becomes part of it, since it then belongs to the landowner and passes with a sale. Courts examine two things. The degree of annexation asks how firmly it is fixed, with something resting on its own weight presumed to remain separate and something bolted or built in presumed not to. The purpose of annexation asks why it was fixed, and it now carries more weight, so a sculpture bolted down to display it as part of a garden design is part of the land, while an identical one bolted down merely to stop it falling over is not.

Several categories sit uneasily across the division and the law has had to work out where to put them. A lease of land for a term of years was historically treated as personal property despite being an interest in land, for reasons of medieval procedure, and it carries the awkward name of a chattel real to record that. Growing crops are treated as goods once they are ready to harvest and as part of the land before that. Fixtures move from one category to the other at the moment they are attached. Shares in a company owning land are goods rather than land. And intangible property including debts and intellectual property sits in the second category without being physical at all.

The term carries a history that has to be stated plainly. Systems of law in the Americas and elsewhere classified enslaved people as personal property of exactly this kind, which meant they could be sold, inherited, mortgaged, seized for debt and separated from families by the ordinary machinery of property law, and the phrase attached to that system is still used to describe it. That classification was not incidental but was the legal mechanism through which the system operated, and understanding the category is part of understanding how it was administered. The word survives in ordinary legal use for goods, and the association is why it is used carefully.

Property divides into land and everything else, a split originating in which remedy medieval courts offered, and it still governs transfer formality, inheritance, tax and security. Whether something bolted to a building is part of it turns on how firmly it is fixed and, more importantly now, on why. The same category was the legal machinery by which people were owned, which the vocabulary still records.