Legal descriptions and land measurement

A legal description identifies the real property affected by a deed, easement, lien, or other instrument. Its function is precision, not convenience. A street address helps a visitor find a building, but addresses can change and may not identify all of the land being transferred. A parcel with two buildings may have more than one address; vacant land may have none.

An assessor's parcel number, commonly APN, supports the county's assessment system. It is useful for research but is not automatically an adequate substitute for the legal description in a conveyance. Assessment parcels, legal lots, and development sites can differ. A single marketing description such as "ten acres near the highway" cannot answer which boundaries or rights the buyer receives.

When documents disagree, a salesperson should obtain clarification rather than select the most attractive number. A surveyor can locate boundaries and reconcile survey evidence within the professional role. A title professional or attorney addresses the related title questions. The exam tests basic recognition and measurement, not authority to resolve a boundary dispute by looking at a fence.

Metes concern measurements, including directions and distances. Bounds concern boundary references. A metes-and-bounds description starts at an identified point of beginning and traces successive calls until the boundary closes. Calls may reference a bearing, distance, monument, road, or adjoining parcel.

For example, an imaginary rectangular parcel might begin at a specified survey monument, run east 200 feet, south 150 feet, west 200 feet, and north 150 feet to the beginning. Real descriptions can involve curves, irregular terrain, exceptions, and older units. The important concept is a traceable perimeter tied to an identifiable location.

A monument can be natural, such as a recognized rock feature, or artificial, such as a survey marker. It is not limited to a commemorative statue. Calls to established monuments often carry substantial weight when descriptions conflict, but legal construction depends on the evidence and applicable rules. Do not treat an informal landscaping stake as a controlling survey monument.

Bearings describe direction from a reference meridian. A call such as north 30 degrees east identifies a direction 30 degrees east of north, not 30 degrees north of east. The difference matters geometrically, although a salesperson-level problem usually requires recognizing the description method rather than computing a full traverse.

A lot and block or recorded map description identifies a lot within a particular recorded subdivision map, typically with its official recording reference. The map provides the detailed geometry. Referring only to "Lot 12" is incomplete when thousands of maps contain a Lot 12.

Condominium descriptions can be more complex because the ownership includes a separately described space or unit and an interest in common area. They may refer to a condominium plan, subdivision map, and recorded declaration. The unit number on a door is not necessarily the legal unit designation. A parking stall might be a separately owned interest, exclusive-use common area, or merely an assigned use right.

Parcel descriptions may also contain an exception: a described larger tract except a specified portion. Do not calculate the buyer's land area from the outer boundary alone when the instrument excludes an interior strip or other parcel. Similarly, an easement across land is not automatically a subtraction from the fee owner's acreage; it is ordinarily a burden on an area the owner still owns.

The public land survey system uses principal meridians running north-south and base lines running east-west. Township designations locate tiers north or south of a base line. Range designations locate columns east or west of a principal meridian. A complete description supplies enough references to locate the correct survey area.

A nominal township is six miles by six miles and contains 36 sections. A nominal section is one square mile or 640 acres. Sections are numbered in a back-and-forth pattern: the first row starts with section 1 in the northeast corner, proceeds west to 6, and the next row reverses direction. Real surveys have corrections and irregularities, so nominal dimensions should not override the official survey.

The word township has other governmental uses; here it names a survey unit. California also includes land with descriptions derived from historic grants and other surveys. Not every parcel fits a perfectly regular township-and-section grid.

Fractions identify successively smaller parts. Read the northeast quarter of the southwest quarter of a section from right to left to visualize location: begin with the section, find its southwest quarter, then find the northeast quarter within that piece. For area, multiply the fractions in any order:

640 acres x 1/4 x 1/4 = 40 acres

Adding another half produces 20 acres. The compass labels locate the piece but do not change the fraction's area. An east half and west half have equal nominal acreage even though they occupy different locations.

The essential conversions are:

A rectangular lot's area is length times width. A triangle's area is one-half times base times perpendicular height. Converting square feet to acres requires division by 43,560. Converting acres to square feet requires multiplication. Carry the units through the calculation to avoid confusing a linear foot with a square foot.

Frontage is a linear boundary dimension, often along a street or waterfront. A price per front foot is multiplied by frontage, not by total area. Two parcels with the same frontage can have different depths and total acreage. A "50-by-120" lot is often presented with frontage first, but verify the convention if the question does not state it.

A rectangular parcel measures 198 feet along a road and 220 feet deep. Its area is 198 x 220 = 43,560 square feet, exactly one acre. At $8 per square foot, the indicated price is $348,480. At $1,500 per front foot, the indicated price is $297,000.

The answers differ because the pricing units differ. There is no mathematical contradiction and no assurance that either is market value. If the buyer purchases the north half, the nominal area is one-half acre, but the frontage depends on the road's orientation and the actual division. Dividing the total area by two does not necessarily divide frontage by two.

Now suppose a 20-foot-wide utility easement runs through the parcel. That restriction can affect usable building area and value, but it does not ordinarily mean the owner must deduct the easement strip from fee acreage. Ownership area and unburdened buildable area are distinct measurements.

Match the description to its method: perimeter calls indicate metes and bounds, a recorded lot reference indicates a subdivision map, and township-range-section references indicate the government survey. Use 43,560 square feet per acre and 640 acres per section. Read nested fractional locations from the largest tract toward the smallest. Treat an address and APN as research aids, and verify the legal description before drawing conclusions about the property conveyed.