9.3 Legal Descriptions, Surveys & Property Measurements

9.3 Legal Descriptions, Surveys & Property Measurements

Exam Focus: The Texas Real Estate Broker Examination requires candidates to evaluate the legal sufficiency of property descriptions under the Texas Statute of Frauds, master metes and bounds boundary calls and closure rules, navigate the Government Rectangular Survey System (PLSS) grid and serpentine section numbering, execute multi-step fractional acreage calculations, interpret recorded subdivision plats, and understand vertical datum and benchmark elevations for air lots and mineral estates.

1. Legal Description Standards & The Texas Statute of Frauds

In real estate conveyancing, a legal description is an exact, unambiguous written description of a specific parcel of real property that distinguishes it from every other parcel of land on Earth.

The Legal Sufficiency Standard in Texas

• Texas Statute of Frauds (Tex. Bus. & Com. Code § 26.01): To be legally enforceable, every contract for the sale of real estate, lease exceeding one year, deed of conveyance, and deed of trust must contain a legally sufficient property description.
• The Sufficiency Test: Under long-standing Texas Supreme Court precedent (Morrow v. Shotwell), a legal description is sufficient only if it furnishes within itself, or by reference to some other existing writing, the means or data by which the specific land to be conveyed may be identified with reasonable certainty.
• Why Informal Street Addresses Fail: A postal street address (e.g., "742 Evergreen Terrace, Austin, TX") is legally insufficient for real estate conveyances because:
  1. Street names and house numbers are subject to municipal renaming, renumbering, and postal redistricting.
  2. A street address does not define the exact boundary lines, angles, acreage, or perimeter footprint of the land.
  3. Parol (oral) evidence cannot be introduced to cure a completely deficient description that lacks foundational boundary data.

┌─────────────────────────────────────────────────────────────────────────────┐
│                     THE THREE MAJOR LEGAL DESCRIPTION SYSTEMS               │
├─────────────────────┬───────────────────────────────────────────────────────┤
│ 1. METES AND BOUNDS │ Primary system in Texas; uses distances (metes),      │
│                     │ compass bearings (bounds), POB, and strict closure.   │
├─────────────────────┼───────────────────────────────────────────────────────┤
│ 2. GOVERNMENT       │ National PLSS system; uses Principal Meridians, Base  │
│    RECTANGULAR      │ Lines, 36-sq-mile Townships, and 640-acre Sections.   │
├─────────────────────┼───────────────────────────────────────────────────────┤
│ 3. LOT AND BLOCK    │ Urban/subdivision system; references recorded plat    │
│    (RECORDED PLAT)  │ maps, lot numbers, block numbers, and plat book pages.│
└─────────────────────┴───────────────────────────────────────────────────────┘

2. The Metes and Bounds Legal Description System

Metes and bounds is the oldest legal description system used in North America, dating back to English common law. It is the predominant system in Texas, the original 13 colonies, and non-public domain states.

Core Structural Components

• "Metes" (Measurements): Refers to linear distances measured in standard units—feet, tenths/hundredths of a foot, chains, rods, or historical Spanish varas.
• "Bounds" (Boundaries & Directions): Refers to compass bearings, directional angles, and boundary markers (monuments).
• Point of Beginning (POB): Every metes and bounds description must commence at a precisely identifiable, surveyed physical point known as the Point of Beginning (POB) (or Point of Commencement).
• Compass Bearings: Directions are expressed in degrees (°), minutes ('), and seconds (") within one of four 90-degree quadrants: North-East, North-West, South-East, or South-West (e.g., "North 42° 18' 35" East a distance of 342.50 feet").
• Monuments: Fixed natural or artificial markers used by surveyors to establish boundary corners (e.g., iron rods with surveyor caps, brass disks set in concrete, stone cairns, oak trees, or creek centerlines). Under survey law, natural monuments take legal precedence over artificial monuments, and monuments take precedence over recorded angles and distances in resolving boundary discrepancies.
• The Strict Closure Rule: After describing each successive boundary line in sequence around the entire perimeter, the final call MUST return precisely to the Point of Beginning ("thence South 89° 12' 10" West, 450.00 feet to the POINT OF BEGINNING"). A metes and bounds description that fails to close is legally defective and void.

Historical Texas Land Units (Spanish / Mexican Heritage)

Because Texas was colonized under Spanish and Mexican law prior to the Republic of Texas and statehood, historical land grants frequently utilize traditional Spanish measurements:

• Vara: The basic Texas historical linear unit: $1 \text{ vara} = 33\frac{1}{3} \text{ inches} = 2.7778 \text{ feet}$ ($36 \text{ varas} = 100 \text{ feet}$).
• Labor: An agricultural land tract equal to $1,000 \times 1,000 \text{ varas} = 1,000,000 \text{ sq varas} = \mathbf{177.1 \text{ acres}}$.
• League (Sitio): A ranching land grant equal to $5,000 \times 5,000 \text{ varas} = 25,000,000 \text{ sq varas} = \mathbf{4,428.4 \text{ acres}}$.

3. The Government Rectangular Survey System (PLSS)

Established by the Land Ordinance of 1785, the Public Land Survey System (PLSS) is the standardized grid system used in 30 public domain western and midwestern states. While Texas is a non-PLSS state (relying on original land grants and metes and bounds), the Rectangular Survey System is heavily tested on the National portion of the Texas Real Estate Broker Examination.

Grid Architecture: Meridians, Base Lines, Ranges & Tiers

• Principal Meridians: Established reference lines running true North and South.
• Base Lines: Established reference lines running true East and West, intersecting Principal Meridians at an initial origin point.
• Range Lines: North-South lines running parallel to Principal Meridians at 6-mile intervals, forming vertical columns called Ranges (numbered Range 1 East [R1E], Range 2 East, Range 1 West [R1W], etc.).
• Township Lines (Tiers): East-West lines running parallel to Base Lines at 6-mile intervals, forming horizontal rows called Township Tiers (numbered Township 1 North [T1N], Township 2 North, Township 1 South [T1S], etc.).
• Township Grid Units: The intersection of a 6-mile Range strip and a 6-mile Township tier forms a Township—a square parcel measuring 6 miles by 6 miles = 36 square miles (23,040 acres).

Serpentine Section Numbering & School Land

• 36 Sections: Every 36-square-mile township is divided into 36 numbered sections. Each section measures 1 mile by 1 mile = 1 square mile = 640 acres = 5,280 feet by 5,280 feet.
• Serpentine Numbering Rule: Numbering starts at Section 1 in the Northeast (NE) corner, proceeds West across the top row to Section 6 (NW corner), drops down to Section 7 and proceeds East to Section 12, continuing back and forth in a serpentine "S" pattern down to Section 36 in the Southeast (SE) corner.
• Section 16 School Reservation: Historically established by Congress, Section 16 (located near the center of every township) is reserved for the maintenance and financial benefit of public schools.
• Correction Lines (Standard Parallels) & Government Lots: Because lines of longitude converge toward the North Pole, standard grid adjustments called Correction Lines (Standard Parallels) are established every 24 miles North and South of Base Lines, and Guide Meridians are established every 24 miles East and West. Fractional, undersized, or oversized sections along the North and West boundaries of a township are designated as Government Lots.

4. Land Measurement Math & Calculating Fractional Acreage

Real estate brokers must perform swift, accurate acreage and square footage calculations on the broker exam.

Essential Mathematical Constants

• $1 \text{ Acre} = \mathbf{43,560 \text{ square feet}}$ (Exam Mnemonic: 4 old people driving 35 in a 60 mph zone: 4-3-5-6-0)
• $1 \text{ Square Mile} = 1 \text{ Section} = \mathbf{640 \text{ Acres}}$
• $1 \text{ Linear Mile} = \mathbf{5,280 \text{ feet}} = 1,760 \text{ yards} = 320 \text{ rods} = 80 \text{ chains}$
• $1 \text{ Rod} = \mathbf{16.5 \text{ feet}} = 5.5 \text{ yards}$
• $1 \text{ Chain} = \mathbf{66 \text{ feet}} = 4 \text{ rods} = 100 \text{ links}$

Calculating Fractional PLSS Parcel Acreage

A section contains 640 acres. Legal descriptions express fractional parcels by dividing quarters ($\frac{1}{4}$) and halves ($\frac{1}{2}$).

• The Sequential Division Method: To calculate total acreage, start with 640 acres and divide sequentially by each denominator in the legal description reading from left to right (or right to left):

$\text{Parcel: } \text{The } S\frac{1}{2} \text{ of the } NE\frac{1}{4} \text{ of the } NW\frac{1}{4} \text{ of Section 14}$

$\text{Calculation: } 640 \div 4 \div 4 \div 2 = \mathbf{20 \text{ acres}}$

• The Denominator Multiplication Method: Alternatively, multiply all denominators together and divide 640 by the product:

$\text{Denominator Product: } 2 \times 4 \times 4 = 32$

$\text{Calculation: } 640 \div 32 = \mathbf{20 \text{ acres}}$

Crucial Exam Rule: Handling the Conjunction "AND"

Exam Trap: When a legal description contains the word "AND" (or a semicolon), it indicates TWO SEPARATE TRACTS OF LAND! You must calculate the acreage of each tract independently and ADD THEM TOGETHER.

$\text{Example: The } N\frac{1}{2} \text{ of the } SW\frac{1}{4} \text{ \textbf{AND} the } SE\frac{1}{4} \text{ of the } NW\frac{1}{4} \text{ of Section 22}$

$\text{Tract 1: } \frac{1}{2} \times \frac{1}{4} \rightarrow 640 \div 4 \div 2 = \mathbf{80 \text{ acres}}$

$\text{Tract 2: } \frac{1}{4} \times \frac{1}{4} \rightarrow 640 \div 4 \div 4 = \mathbf{40 \text{ acres}}$

$\text{Total Combined Acreage: } 80 + 40 = \mathbf{120 \text{ acres}}$

5. Lot and Block System & Vertical Land Descriptions

The Lot and Block (Recorded Plat) System

• Applicability: The primary legal description system utilized in urban, suburban, and master-planned residential subdivisions.
• The Platting Process:
  1. A licensed professional land surveyor surveys the parent tract using metes and bounds.
  2. The surveyor drafts a detailed Subdivision Plat Map, dividing the acreage into numbered blocks and lots, delineating public streets, sidewalks, building setback lines, and Public Utility Easements (PUE).
  3. The plat is submitted to the municipal planning commission and city council for formal approval.
  4. The approved plat is recorded in the official Plat Records / Map Records in the County Clerk's office where the land is located.
• Statutory Description Format: Once recorded, lots are legally described by reference to lot, block, subdivision name, and recording data: "Lot 8, Block 4, Falcon Ridge Phase 1, an addition to the City of Cedar Park, Williamson County, Texas, according to the map or plat recorded in Cabinet C, Slide 88, Plat Records of Williamson County, Texas."

Vertical Land Descriptions: Datums, Benchmarks & Air Lots

Standard land descriptions identify two-dimensional horizontal surface boundaries. However, multi-story buildings, condominium airspace units, subsurface mineral estates, and subterranean utility tunnels require three-dimensional vertical descriptions.

• Datum: A formal reference horizontal plane, point, or surface of known elevation from which heights, elevations, or depths are calculated. The primary official vertical datum used in the United States is the Mean Sea Level (MSL) established by the National Oceanic and Atmospheric Administration (NOAA) / North American Vertical Datum (NAVD88).
• Benchmarks: Permanent, embossed brass markers affixed into solid bedrock, concrete monuments, or bridge piers by government surveyors (such as the U.S. Geological Survey - USGS), stamped with the exact elevation above the official datum. Surveyors use benchmarks as local starting points to establish vertical elevations.
• Air Lots (Condominium Airspace): An air lot is a defined cubicle of airspace above the land surface. It is described by establishing the upper and lower horizontal ceiling/floor planes and vertical perimeter boundary planes, all tied directly to an official datum elevation.
• Subsurface Mineral Estates: Texas is a severed mineral estate state. Mineral conveyances describe subterranean oil, gas, and mineral strata by specific depth planes below sea level datum (e.g., "all oil, gas, and associated hydrocarbons situated between 9,200 feet and 11,500 feet below sea level datum").

6. Legal Description Systems & Measurement Reference Table

Comparison of Legal Description Systems

| System | Geographic Usage | Primary Reference Components | Key Legal Rules / Limitations | | :--- | :--- | :--- | :--- | :--- | | Metes and Bounds | Texas, original 13 colonies, rural acreage | Point of Beginning (POB), linear distances (metes), compass bearings (bounds), monuments | Must return to POB to close; failure to close voids description; natural monuments control | | Government Rectangular (PLSS) | 30 public domain states (tested on National exam) | Principal Meridians, Base Lines, 6x6-mile Townships, 36 Sections (640 acres each) | Serpentine numbering starting NE corner (Sec 1 to 36); Section 16 reserved for schools | | Lot and Block (Recorded Plat) | Urban and suburban residential subdivisions | Lot #, Block #, Subdivision Name, Plat Book/Cabinet and Page | Plat must be approved by municipality and recorded in County Clerk public records | | Vertical Descriptions | Condominium air lots, multi-story buildings, mineral strata | Datum (Mean Sea Level), Benchmarks (brass markers), upper/lower elevation planes | Establishes 3D ownership boundaries above or below surface datum elevation |

Land Measurement Conversion Matrix

| Unit | Equivalent Linear Feet | Equivalent Inches / Yards / Rods | Equivalent Acres / Square Feet | | :--- | :--- | :--- | :--- | :--- | | 1 Square Foot | 1 ft × 1 ft | 144 square inches | 0.000022956 acres | | 1 Acre | N/A (Area) | 43,560 square feet | 43,560 sq ft / 208.71 ft × 208.71 ft square | | 1 Linear Mile | 5,280 feet | 1,760 yards / 320 rods / 80 chains | N/A (Linear) | | 1 Square Mile (Section) | 5,280 ft × 5,280 ft | 27,878,400 square feet | 640 Acres (1 Section) | | 1 Township | 6 miles × 6 miles | 36 square miles | 23,040 Acres (36 Sections) | | 1 Rod (Pole / Perch) | 16.5 feet | 5.5 yards / 198 inches | N/A (Linear) | | 1 Chain | 66 feet | 4 rods / 100 links | N/A (Linear) | | 1 Texas Vara | 2.7778 feet | 33⅓ inches (36 varas = 100 feet) | N/A (Linear) | | 1 Texas Labor | 1,000 varas × 1,000 varas | 1,000,000 square varas | 177.1 Acres | | 1 Texas League (Sitio) | 5,000 varas × 5,000 varas | 25,000,000 square varas | 4,428.4 Acres |