Real property is land and everything permanently attached to or part of it: the soil itself, the rocks and minerals beneath it, the airspace above it, the water that touches it, and the buildings, fences, and other improvements fixed to its surface. The federal tax code reflects that broad scope by treating real property interests as including not only outright ownership but also leaseholds and options tied to land or its improvements.1Office of the Law Revision Counsel. 26 US Code 897 – Disposition of Investment in United States Real Property Interests The category matters every time you buy a home, pay a tax bill, grant an easement, or argue over a fence line, because the rules that govern real property are different from the rules that govern anything movable.
What’s Included in Real Property
Start with the ground. Soil, rocks, and natural vegetation are real property. Trees are real property while rooted; cut them down and haul them away and they turn into personal property. Oil in an underground reservoir is part of the real estate; the same oil in a barrel on a truck is not. That line between immovable and movable is the simplest test for sorting the two categories.
Buildings and permanent improvements come with the land. A house, a detached garage, a poured concrete driveway, a built-in pool — each is affixed to the earth and transfers with the parcel when it sells. Real property also covers incorporeal interests like easements, which give someone other than the owner a legal right to use part of the land.
Fixtures: When Personal Property Crosses the Line
Items that begin as personal property can become real property through permanent attachment. The Uniform Commercial Code defines a fixture as a good that has become “so related to particular real property that an interest in them arises under real property law.”2Legal Information Institute. Uniform Commercial Code 9-102 – Definitions and Index of Definitions Built-in cabinetry, plumbing, ceiling fans, and central heating and cooling systems are typical examples. A window air conditioner you can unplug and carry away stays personal property. A central HVAC system with ductwork running through the walls is a fixture, and it stays with the house.
When a dispute arises, courts look at how the item is attached, whether removing it would damage the structure, and what the installer intended. Custom shelving bolted into the studs and finished around the edges is probably a fixture. The same shelving leaning against a wall under its own weight is not. The distinction tends to surface at closing, when buyers reasonably assume anything integrated into the home’s function stays with it.
A Note on Manufactured Homes
Manufactured homes arrive on wheels but are often meant to serve as permanent housing, which creates a classification problem. Under state law, new manufactured homes are generally titled as personal property. Converting one to real property requires physically and legally tying it to the land: removing the wheels, axles, and towing hardware, attaching the home permanently to a foundation, surrendering the vehicle title to the appropriate state agency, and having the home assessed as real estate.3HUD Exchange. Housing Counseling – Manufactured Housing Quick Tips Skip any step and the home remains personal property, which limits financing options and can create title problems later.
Rights Below, Above, and Around the Surface
Owning real property is not limited to the ground you stand on. Ownership runs downward into the earth and upward into the sky, though modern law puts practical limits on both.
Subsurface and Mineral Rights
The old common law maxim, often shortened to “ad coelum,” held that a landowner controlled everything from the center of the earth to the heavens. No court applies it that literally today, but the principle survives in practical form: you own the soil, rock, groundwater, minerals, oil, and gas beneath your parcel. You can extract those resources yourself or lease the extraction rights to someone else for royalties.
Subsurface rights can be legally separated from surface ownership. That happens either through a mineral deed, where the surface owner sells the mineral rights to someone else, or a mineral reservation, where the owner sells the land but keeps what lies beneath. Once severed, surface and subsurface become independent property interests that can be bought, sold, and inherited on their own. For rural land in particular, confirming whether the mineral rights come with the surface is one of the most important checks a buyer can run. A prior owner may have sold them off decades ago.
Airspace Rights
Your ownership extends into the air above the land far enough for you to use and enjoy it. You can build as tall as local zoning and building codes allow. But in 1946 the Supreme Court held that the ad coelum doctrine “has no place in the modern world” when it comes to aircraft, and declared navigable airspace a public highway, so routine airline overflights do not trespass on private land.4Justia. United States v Causby, 328 US 256 (1946) Low and frequent flights that directly interfere with your use of the land can still amount to a government taking that requires compensation.
A newer airspace question involves access to sunlight. A growing number of states allow property owners to create solar easements, which prevent a neighbor from building something that blocks sunlight needed for solar panels. These easements have to be recorded in writing to be enforceable. For anyone investing in solar generation, a written easement from the affected neighbor is the only dependable way to protect that access for the long term.
Water Rights
Water rights in the United States follow two very different systems depending on geography. Eastern states generally apply riparian rights, which give every landowner whose property borders a natural body of water a right to reasonable use of that water. You can draw from the river or stream that touches your land, but not so much that your downstream neighbor has nothing left.
Western states developed a different approach called prior appropriation, which has nothing to do with whether your land touches the water. Under this system, the first person to divert water and put it to beneficial use holds the senior right. Later users get what remains, and in a drought, senior rights holders are served first. If your land is in a western state, your water rights may turn entirely on when someone first filed a claim, potentially generations before you bought the property.
Types of Ownership Interests
Not every owner of real property holds the same bundle of rights. The law breaks ownership into estates that differ in duration, transferability, and scope of control.
Fee Simple Absolute
Fee simple absolute is the most complete ownership interest the law recognizes. It lasts indefinitely, passes to heirs through a will or intestacy, and carries the full range of ownership rights: possession, use, exclusion of others, and the power to sell or give the property away. Most residential homeowners hold fee simple title, even if they never use the term. When people say they own a house outright, this is the interest they mean.
Life Estates
A life estate gives someone the right to live on and use a property for the rest of their life, and no longer. When the life estate holder dies, ownership passes automatically to a designated person called the remainderman. This arrangement shows up often in estate planning. A parent might deed the family home to their children while retaining a life estate, which lets the parent stay in the house for life and lets the children inherit without probate. The life estate holder can even sell or lease their interest, but the buyer or tenant takes only what the holder had: rights that end when the holder dies.
Leasehold Estates
A leasehold gives you possession and use of property for a defined period without actual ownership. Apartment renters, commercial tenants, and ground-lease holders all have leasehold interests. The landlord keeps ownership while the tenant holds a right to occupy under the terms of the lease. A leasehold is classified as a non-freehold estate because the tenant never acquires title to the land itself.
Co-Ownership Forms
When two or more people own the same property, the form of co-ownership determines what happens when one owner dies, whether owners can sell their share on their own, and how disputes resolve.
- Tenancy in common. Each owner holds a separate, transferable share, and shares do not have to be equal. When one owner dies, their share passes to their heirs through probate rather than to the other co-owners. This is the default form of co-ownership in most jurisdictions when the deed does not specify otherwise.
- Joint tenancy. All owners hold equal shares acquired at the same time through the same deed. The defining feature is a right of survivorship: when one joint tenant dies, the surviving owners absorb that share automatically, bypassing probate. Breaking any of the required unities (equal interest, simultaneous acquisition, shared title document, shared possession rights) can convert a joint tenancy into a tenancy in common.
- Tenancy by the entirety. Available only to married couples, this form provides an automatic right of survivorship and an additional layer of protection: neither spouse can sell or transfer their interest without the other’s consent. In states that recognize it, this arrangement can shield the property from creditors who have a claim against only one spouse.
When co-owners cannot agree on what to do with the property, any owner in a joint tenancy or tenancy in common can force a partition. A court will either divide the land physically, if that is practical, or order it sold and split the proceeds. Co-owners who want to avoid that outcome should put a written agreement in place covering buyouts before a disagreement escalates.
Limits on What You Can Do With Real Property
Fee simple ownership sounds absolute, but every property owner operates within a web of restrictions. Some are private agreements. Others are imposed by government authority.
Easements
An easement gives someone other than the owner a legal right to use part of the property for a specific purpose. Utility easements are the most common: power companies, water districts, and telecom providers often hold recorded easements to install and maintain infrastructure across private land. Easements can also grant a neighbor access to a road, allow drainage across your property, or protect a shared driveway. They survive changes in ownership and show up during title searches, which is why checking for them before buying is essential.
Liens
A lien is a creditor’s legal claim against your property, held as security for an unpaid debt. Mortgage liens are voluntary; you agreed to them when you took out the loan. Tax liens, mechanic’s liens filed by contractors for unpaid work, and judgment liens are involuntary and can attach without your consent. Tax liens are especially aggressive because they take priority over almost every other claim, including the mortgage. If property taxes go unpaid long enough, the government can eventually force a sale of the property to recover what is owed.
Zoning and Land Use Regulations
Local governments control how property within their borders can be used through zoning ordinances. A parcel zoned residential generally cannot be used as a retail store or industrial warehouse. Zoning rules also set building setbacks, lot coverage, height limits, and density. Changing a property’s zoning designation requires applying for a variance or rezoning, which involves public hearings and is never guaranteed. Checking the zoning classification before you buy avoids the expensive surprise of discovering your intended use is not permitted.
Eminent Domain
The Fifth Amendment allows the government to take private property for public use, but only if it pays “just compensation.”5Constitution Annotated. Amdt5.10.2 Public Use and Takings Clause In practice, the government can force the sale of your home or land for a highway, school, utility line, or other public project. The compensation must reflect fair market value, though owners frequently dispute the government’s appraisal. You have the right to challenge both the taking itself and the amount offered.
Covenants, Conditions, and Restrictions
Private restrictions called CC&Rs are common in planned communities and subdivisions. A developer records a declaration setting rules on everything from exterior paint colors to fence heights to whether you can park a boat in your driveway. These restrictions run with the land, meaning they bind every future owner of the property, not just the person who originally agreed to them. Accepting a deed that references CC&Rs is legally treated the same as signing the restrictions yourself. Homeowners associations enforce the rules and can impose fines or place liens on the property for violations.
Losing Real Property Through Adverse Possession
Someone who occupies land openly and without the owner’s permission for long enough can actually acquire legal title to it. This doctrine, called adverse possession, exists partly to encourage productive use of land and partly to penalize owners who ignore their property for extended periods.
To succeed, the person claiming adverse possession has to show that the occupation was:
- Continuous. Uninterrupted for the full statutory period, though successive occupants can combine their time if there is a connection between them, such as a buyer-seller relationship.
- Hostile. Without the owner’s permission. A renter can never adversely possess the property they are renting, no matter how long they stay.
- Open and notorious. Obvious enough that a reasonable owner who checked on the property would notice.
- Actual. The person is physically using or occupying the land, not just claiming it from a distance.
- Exclusive. The possessor controls the property to the exclusion of others, including the true owner.
The required time period runs from roughly 5 to 20 years depending on the jurisdiction and whether the occupant holds “color of title,” a document that looks like valid proof of ownership but has a legal defect. Color of title shortens the required period in many jurisdictions. This is where owners who neglect vacant land or second homes for years can lose real money. Checking on the property periodically and addressing unauthorized use promptly is the simplest way to prevent an adverse possession claim from taking root.
How Real Property Is Taxed
Real property is subject to annual property taxes levied by local governments: counties, municipalities, and school districts. The bill is based on the property’s assessed value, which a local assessor determines by estimating fair market value. That assessed value is then multiplied by the local tax rate, sometimes called a millage rate, to produce the amount owed. Effective property tax rates vary significantly across the country, generally ranging from under 0.3% to over 2% of the property’s value.
Most jurisdictions offer a homestead exemption that reduces the taxable value of your primary residence. Eligibility rules vary, but you almost always have to own the home and live in it as your primary residence by a specific date each year. Some programs offer larger exemptions for seniors, veterans, or people with disabilities. If property taxes go unpaid, the local government places a tax lien on the property. After a waiting period that varies by jurisdiction, the property can be sold at auction to satisfy the debt, and because tax liens take priority over mortgage liens, the bank loses too.