TL;DR

A legal description identifies a parcel of land precisely enough that an independent surveyor can locate it — and a street address is not enough. The three systems tested are metes and bounds, lot and block (recorded plat), and the rectangular (government) survey. For the Texas exam, the key twist is that Texas never adopted the federal rectangular survey system. Texas land descriptions rest on metes and bounds and on the original Spanish and Mexican land grants, with parcels tied to an original survey and a permanent abstract number. Lot and block is used for modern platted subdivisions. Expect questions on what makes a description legally sufficient and on how Texas differs.

Why legal descriptions are on the exam

Every deed, mortgage, and title insurance policy depends on a legal description. If the description is wrong or ambiguous, the document conveying the property can fail, and boundary disputes follow. The exam tests this topic because a licensee has to recognize a proper legal description, understand why a mailing address will not serve as one, and — in Texas — know that the state's land system is not the township-and-range grid most national exam material describes.

A legal description is a description of a specific parcel complete enough for an independent surveyor to locate and identify it. The test is functional: hand the description to a surveyor who has never seen the property, and they should be able to find and mark its exact boundaries. For how the legal description carries through into the conveyance, see our guide to deeds and title transfer in Texas.

Why a street address is not a legal description

A mailing address, a tax parcel identification number, and a casual reference such as "the old Miller place" are all useful for everyday purposes, but none is a legal description. Addresses can change, are assigned by local convention rather than by survey, and do not define boundaries. A tax ID locates a parcel for assessment but does not describe its dimensions. A legal description must fix the actual boundaries of the land, and it always identifies the county and state in which the property sits.

The three systems of legal description

Across the United States, three systems are used to write legal descriptions. A licensee should understand all three, even though only some are used in Texas.

Metes and bounds. This is the oldest method and the one Texas relies on most. "Metes" refers to distances and measurements; "bounds" refers to boundaries. A metes-and-bounds description starts at a defined point of beginning, then traces the perimeter of the parcel as a series of calls — each stating a direction, usually as a compass bearing in degrees, minutes, and seconds, and a distance — until the description returns to the point of beginning. The description must close: it must end exactly where it started, enclosing the parcel. Historically the calls referenced physical monuments such as a marked tree or an iron rod; modern surveys use precise measured coordinates. Metes and bounds can describe a parcel of any irregular shape, which is why it suits land that was never laid out on a uniform grid.

Lot and block. Also called the recorded plat system, this method identifies a parcel by its lot number and block number within a named, recorded subdivision. A typical description reads "Lot 2, Block 4, Oak Hills Estates," followed by the county and state. The system works because the subdivision's plat map is recorded in the public records; the plat shows every lot and block with its dimensions, so the short reference points to a full survey on file. Lot and block is the common method for modern subdivisions in cities and suburbs, including in Texas.

Rectangular (government) survey. Also called the Public Land Survey System or the Jeffersonian system, this federal method divides land using principal meridians running north-south and baselines running east-west. The land is organized into townships, and each township into 36 sections, with a section measuring one mile by one mile and containing 640 acres. Sections are divided into quarters and quarter-quarters. This system covers much of the United States — but, as the next section explains, not Texas.

Why Texas is different

This is the most important point on the topic for the Texas exam. Texas does not use the federal rectangular survey system. When Texas joined the United States in 1845, it kept ownership of its public lands rather than ceding them to the federal government, so the federal township-and-range grid was never extended across the state.

Instead, Texas land descriptions grow out of the original Spanish and Mexican land grants and the surveys made for the Republic and State of Texas. Much of the state was first surveyed by metes and bounds, often with boundaries that followed rivers and other natural features rather than straight grid lines. Modern Texas land descriptions identify a parcel by reference to its original survey — for example, the survey made for a named grantee — together with a permanent abstract number. Unlike the federal system, a Texas abstract number is assigned to an original survey in perpetuity and does not change as the land is divided and sold over the years. Understanding that Texas land traces back to original grants connects to the broader subject of how ownership is documented and insured, covered in our guide to title insurance in Texas.

Texas also carries its own historic units of measure. The vara, a Spanish unit legally fixed at 33 and one-third inches, appears throughout older Texas surveys. Larger grant units include the labor and the league, with a league equal to 25 labors. A licensee does not need to perform calculations in varas for the exam, but should recognize the terms as part of the Texas land-description tradition. For modern platted neighborhoods, Texas uses lot and block like everywhere else; for unplatted and rural land, metes and bounds tied to the original survey remains the rule.

The role of the surveyor and the plat

A licensed surveyor, not the real estate agent, prepares legal descriptions and the survey documents that support them. A survey states the property's legal description; a survey sketch or plat shows the location and dimensions of the parcel graphically. When a Texas subdivision is created, the developer records a subdivision plat, and from that point individual lots are conveyed by the short lot-and-block reference rather than by repeating a full metes-and-bounds description each time. The licensee's job is not to write or interpret survey calls, but to make sure the contract and the conveyance documents carry the correct legal description and to recommend a current survey when the situation calls for one. This fits within the licensee's broader duty of competent, careful representation explained in our guide to Texas license law and its key rules.

Common misconceptions

  1. "The street address is the property's legal description." Wrong. An address, a tax ID, and an informal name are not legal descriptions. A legally sufficient description relies on a recognized land-description method — metes and bounds, lot and block, or a rectangular survey description where that system applies.
  2. "Texas land is described by township, range, and section." Wrong. Texas never adopted the federal rectangular survey system. Texas uses metes and bounds and original land-grant surveys, with lot and block for platted subdivisions.
  3. "A metes-and-bounds description can stop wherever it ends." Wrong. A metes-and-bounds description must close — it must return to the point of beginning and fully enclose the parcel.
  4. "The real estate agent writes the legal description." Wrong. A licensed surveyor prepares legal descriptions and surveys. The agent's job is to ensure the correct description is used in the documents.

Frequently asked questions

What makes a description a legal description?
It must identify the parcel precisely enough that an independent surveyor can locate and mark its exact boundaries, and it must name the county and state. A street address does not meet that standard.
What are the three systems of legal description?
Metes and bounds, lot and block (the recorded plat system), and the rectangular or government survey system. Texas uses metes and bounds and lot and block, not the rectangular survey.
Does Texas use the rectangular survey system?
No. Texas retained its public lands when it joined the Union, so the federal rectangular survey was never applied. Texas descriptions rest on metes and bounds and the original Spanish and Mexican land grants.
What is a point of beginning?
It is the defined starting point of a metes-and-bounds description. The description traces the parcel's perimeter from that point and must return to it, closing the boundary.
What is a Texas abstract number?
It is a number assigned to an original land survey or grant in Texas. It is permanent — it stays with the original survey even as the land is subdivided and sold, unlike parcel numbers in the federal system.
What is the lot and block system used for?
It identifies parcels within a recorded subdivision plat by lot number, block number, and subdivision name. It is the common method for modern subdivisions in Texas cities and suburbs.

Bottom Line

Legal descriptions exist so that land can be identified beyond dispute, and the exam rewards a few clear facts. A legal description must let an independent surveyor locate the parcel; an address never qualifies. Know the three systems — metes and bounds, lot and block, rectangular survey — and then know the Texas exception: Texas is a metes-and-bounds state built on original Spanish and Mexican land grants, with permanent abstract numbers and lot and block for platted subdivisions, and it does not use the federal township-and-range grid. Keep that distinction sharp and this topic is straightforward. Keep building your command of the tested material with our Texas real estate exam blueprint.

Source: Texas General Land Office, Land Grant Database (Texas land grants, original surveys, and abstract numbers), glo.texas.gov (Land Grant Database); McKissock Learning, Writing Legal Land Descriptions, mckissock.com (Writing Legal Land Descriptions); BoyarMiller, Metes and Bounds: Understanding Land Survey Systems, boyarmiller.com/metes-and-bounds-understanding-land-survey-systems.