How to Find Property Lines: 7 Ways, Free to Paid

To find property lines, start with the records that describe them: an existing survey, the legal description in your deed and the recorded plat. County GIS maps and phone apps show approximate outlines only. On the ground, survey pins are physical evidence of the corners. To have a line located for a fence, a building or a purchase, call a licensed land surveyor.

Pillar, a land research software company, wrote this guide. Boundary law is state law and every county keeps its own records, so each rule and quotation below belongs to the state or county named. We checked every source on November 14, 2026. This is general information, not legal or surveying advice. Confirm anything that affects a fence, a building or a purchase with a licensed surveyor or attorney in your state.

How to find property lines: seven methods, from free to paid

The first four are records you read at a desk. Only the sixth gives you a line you can build to. Apps come last because they stack two errors: the parcel layer's and your phone's.

1. An existing survey, in your closing papers or on file with the county. Free.
2. The legal description on your deed. Free if you have the deed.
3. The recorded subdivision plat. Free where the county posts plats online.
4. The county GIS parcel viewer. Free and approximate.
5. The survey pins at the corners. Free to look for.
6. A licensed land surveyor. Paid.
7. Phone apps and web maps. Free to subscription, and approximate.

How to find my property lines for free: the three records

1. An existing survey

Where to look. Start with your closing papers. DuPage County, Illinois says most plats of survey, its name for the drawing of a single surveyed property, "are held by either a property owner, a mortgage company, a government agency that issued a building permit, or the land surveyor that prepared it," and "are rarely filed with the County Recorder of Deeds" (DuPage County GIS). Some counties keep surveys on file. Kitsap County, Washington says owners can contact its Auditor's Recording department "to check for a recent survey or to acquire a copy of your plat, if there is one" (Kitsap County Assessor).

What it gives you. A drawing of the lines and corners as a surveyor found them. Our boundary survey guide explains how to read one and how it differs from a mortgage location survey or a plot plan.

How accurate it is and what it cannot do. It reports the lot on the day of the fieldwork and marks nothing on the ground today. DuPage County's warning: "Plats of survey are like bread, they get stale after awhile."

2. The legal description on your deed

Sacramento County, California states the rule plainly: "Your property boundaries are defined by the legal description on your deed" (Sacramento County Assessor). If you do not have your deed, ask the office that records deeds in your county for a copy.

What it gives you. The written description that defines the parcel. Sacramento County says a deed "typically references distances and bearings" or may reference a lot on a recorded subdivision or parcel map. The first form is metes and bounds, and our guide shows how to read each call. The second points to the plat, method 3.

How accurate it is and what it cannot do. It is the definition, but it is words and numbers. The same Sacramento County page says: "To identify the physical boundaries of your property, you will need to contact a licensed land surveyor or civil engineer."

3. The recorded subdivision plat

If your deed describes a lot in a named subdivision, the plat is the drawing it points to. The office that records deeds keeps it. Our plat map guide shows how to find a plat and reads a real one item by item.

What it gives you. The lot's dimensions and bearings, the streets and the easements the plat created.

How accurate it is and what it cannot do. It shows the lot as it was laid out when the plat was recorded, not what has been built or what has happened to the pins since. DuPage County says neither a subdivision plat nor a tax assessment map "can be a substitute for a plat of survey."

Property lines map: how accurate are GIS property lines?

4. The county GIS parcel viewer

A county GIS parcel viewer draws parcel outlines over an aerial photo.

Where the lines come from. Beltrami County, Minnesota explains: "Parcel maps are developed primarily from property tax records and deeds. Even though they display 'boundaries' on a map, they are not surveys and should not be used for locating property lines and corners" (Beltrami County GIS).

How accurate it is. We found no national figure. Counties that describe their own maps give very different answers:

• Nevada County, California. "The accuracy of parcel boundaries varies considerably, with errors ranging from just a few feet to 150 feet in some areas" (Nevada County GIS FAQ).
• Beltrami County, Minnesota. "We have encountered situations where some of our parcel boundaries were off by more than 100 feet."
• Van Buren County, Michigan. "Some lines are relatively accurate, while others may be off 20 feet or more." The county is working to improve its parcel lines to plus or minus 3 feet and says the project "will take many years to complete" (Van Buren County).

Those are three counties describing their own data. Read your county's disclaimer.

What it cannot do. It cannot locate a line or settle an argument. Sacramento County: "Assessor Maps are NOT surveys and as such should not be used in either defining property lines or in resolving disputes between neighbors." The map can also lag. Beltrami County says that when you buy, sell, subdivide or combine a property, "the updates usually will not show up immediately on a parcel map."

What it is good for. Finding the parcel number, the owner of record and the neighboring parcels, so you can pull the right deed and plat. A viewer may show the deeded acreage, an acreage calculated from the outline, or both. Our guide to deeded acres vs. GIS acres explains why the two differ.

How to find property pins

5. The survey monuments at the corners

Property pins are the monuments a surveyor sets at the corners of a lot.

What they look like. Linn County, Oregon: "Property pins can be rebar or iron pipes that are driven into the ground. The rebar may have a colored plastic cap that has the name of the surveyor or company name on them" (Linn County Surveyor). In Ohio, every boundary or reference monument a surveyor sets must, when practicable, be of durable material, at least thirty inches long and at least 0.21 square inches in cross-section, carry a durable marker with the surveyor's Ohio registration number, name or company name, and be "detectable with conventional instruments for finding ferrous or magnetic objects" (Ohio Adm. Code 4733-37-03). Where physical obstructions such as pavement, large rocks or large roots mean neither a boundary monument nor a reference monument can practicably be set to that standard, the rule requires alternative monumentation that is "essentially as durable and identifiable," such as a drill hole, a nail or a spike. It must be clearly identified on the plat and in any new deed description written for the property.

How to look for them.

1. Get the survey or plat first. Kitsap County says recorded surveys and plats "often have notes describing the property corner monuments."
2. Contact 811 before you dig. PHMSA, the federal pipeline safety agency, says it is important to contact 811 "no matter who you are or how big or small your project is" (PHMSA). The legal duty comes from state law. In Washington, unless an exemption applies, an excavator must first "mark the boundary of the excavation area with white lining or, when necessary, white pin flags," then give notice to all facility operators through a one-number locator service. If marking is infeasible, the notice must be electronic. The notice must come "not less than two full business days and not more than 10 full business days before the scheduled work-to-begin date," unless the excavator and the facility operators agree otherwise in writing. The excavator "must not excavate until all known facility operators have marked their locatable underground facilities" or, "in the case of nonhazardous liquid or nongas pipeline facilities," provided information about their unlocatable facilities. Since January 1, 2026, the excavator also "may not commence excavation until the excavator has received positive response from all operators with underground facilities in the area identified in the notice" (RCW 19.122.030). One exemption covers a dig "of less than twelve inches in depth on private noncommercial property" by the person who owns or occupies it, or that person's employee (RCW 19.122.031). An exempt dig is still "subject to the requirements specified in RCW 19.122.050." Under that section, an excavator who "contacts or damages an underground facility shall notify the facility operator directly, if the facility operator is known, and a one-number locator service," and report the damage as required under RCW 19.122.053. If the damage causes an emergency condition, the excavator must also call 911 and take all appropriate steps to ensure public safety. "No damaged underground facility may be buried until it is repaired or relocated" (RCW 19.122.050). Check your state's rule.
3. Measure from the right-of-way, not the pavement. Linn County's advice for its roads: "Your property line should not be measured from the edge of the road, it should be measured from the edge of the ROW."
4. Search at the spot. Linn County says caps "may get pushed underground" over time, and that you can find pins "by digging for them or using a metal detector."
5. Uncover it, photograph it and leave it alone. In Washington, "A person who intentionally disturbs a survey monument placed by a surveyor in the performance of the surveyor's duties is guilty of a gross misdemeanor and is liable for the cost of the reestablishment" (RCW 58.04.015). In California, a person who maliciously "removes any monument erected for the purpose of designating any point in the boundary of any lot or tract of land" is guilty of a misdemeanor (Penal Code 605).

How accurate it is and what it cannot do. A pin is physical evidence of a corner, not a certified line. Our own caution, not a quoted rule: you cannot tell from the ground whether a pin has been moved. A pin is also not always on the corner. Where it is impossible or impracticable to set a boundary monument on the corner itself, such as inside a tree or a building, Ohio has the surveyor set a reference monument "similar in character to the boundary monument," preferably along one of the property lines that intersect at the corner. It must be clearly identified as a reference monument on the plat and in any new deed description written for the property.

Who do I call to find my property lines?

6. A licensed land surveyor

Call a licensed land surveyor. Licensing boards for engineers and surveyors operate in all 50 states, and NCEES, the national council of those boards, lists them as its members (NCEES). California's statute shows what the license covers. It lists among the acts that are the practice of land surveying: "Locates, relocates, establishes, reestablishes, or retraces any property line or boundary of any parcel of land" (Bus. & Prof. Code 8726). Anyone practicing land surveying in California "shall be licensed under this chapter," and the chapter has its own exemptions (Bus. & Prof. Code 8725).

What it gives you. Linn County's summary: "The corners will get marked with pins so you will know your property lines for future use."

How accurate it is and what it cannot do. Kitsap County says: "On site property surveys are the only way to identify actual property lines and corners." A survey does not settle a disagreement with a neighbor by itself. In Washington, for example, owners fix a disputed line by a recorded agreement or a lawsuit, as covered below.

What it costs. The boundary survey guide lists published prices, what drives them and what to give the surveyor.

Who else to call, and for what:

• The county recorder, clerk or auditor for copies of your deed and plat, and for recorded surveys where the county keeps them. Linn County, Oregon keeps survey maps at its Surveyor's Office.
• Not the assessor or the county GIS office. Sacramento County's assessor says a fence disagreement with a neighbor "is a private civil matter that cannot be resolved by the Assessor." Beltrami County "does not survey individual properties for private land owners."
• Not 811. PHMSA says the companies 811 notifies "can then determine and mark the exact location of their utilities." Its page says nothing about property lines.

Is there an app to find property lines? Can Google Maps show them?

7. Phone apps and web maps

Apps that show property lines display a parcel layer with your phone's location drawn on top. onX, one example, says it builds its layer from public information and other proprietary data, pulling "data from over 3,100 counties in the U.S." (onX).

How accurate they are. Two errors stack.

• The parcel layer. onX tells users that its property line information "is based on third-party data, which may contain inaccuracies or change at any time. It does not constitute a legal survey."
• The phone. GPS.gov says "GPS-enabled smartphones are typically accurate to within a 4.9 m (16 ft.) radius under open sky" and that "their accuracy worsens near buildings, bridges, and trees" (GPS.gov).

Two county GIS offices put it bluntly. Nevada County, California: "Please don't attempt to use the My Neighborhood Latitude/Longitude tool and a GPS device to locate a property corner, as both of these tools will introduce significant error." Beltrami County: "Smartphone apps are great for many things. Land surveying isn't one of them."

Google Maps. Google's layers article lists Map, Satellite, Terrain, Traffic, Transit, Biking, Street View, Globe view, Air quality, Travel Time and Wildfires. The only boundary lines it describes are international borders and state or province borders. A search of Google Maps Help for "property lines" returned community forum threads but no help article about them. Some guides say faint lot lines appear when you zoom in. Google's help pages do not document them, so we cannot say where they come from or how accurate they are.

What they cannot do. They help you get your bearings on a large tract. They cannot tell you where to put a fence.

Do fences, hedges or mowing lines show the property line?

No. They show where someone chose to build, plant or mow. Linn County says an existing fence "is a good indicator of where an existing property line may be located," then warns owners not to "rely solely on this method as it is only a guide and is not considered an accurate method to determine property line."

A fence in the wrong place still matters, in two ways.

• It may be an encroachment. Our encroachment guide covers what to do when a fence, driveway or shed crosses a line.
• Time can change the legal position. In Iowa, a party to a boundary lawsuit may put in issue that boundaries or corners have been "recognized and acquiesced in by the parties or their grantors for a period of ten consecutive years" (Iowa Code 650.6). If the court finds they were, "such recognized boundaries and corners shall be permanently established" (Iowa Code 650.14). Other states use other doctrines and periods. The encroachment guide covers adverse possession, and our prescriptive easement guide covers rights gained by long use.

What to do when you and a neighbor disagree about the property line

1. Compare records. Each owner pulls the deed, the plat and any survey.
2. Get a survey. Sacramento County's assessor recommends that neighbors who disagree about a fence "contact a licensed professional land surveyor for assistance."
3. Put the agreement in writing and record it. State law sets the form. In Washington, when a boundary point or line cannot be identified from the public record, monuments and landmarks, "or is in dispute," and all the affected landowners agree on its description and marking, they "shall document the agreement in a written instrument, using appropriate legal descriptions and including a survey map," filed in accordance with chapter 58.09 RCW. Each party signs and acknowledges it as for a conveyance of real property, and it is recorded in the county's real estate records. The agreement "is binding upon the parties, their successors, assigns, heirs and devisees and runs with the land" (RCW 58.04.007). In Utah, a boundary establishment is "an agreement between adjoining property owners to clarify the location of an ambiguous, uncertain, or disputed common boundary" (Utah Code 17-79-102, the county land use definitions). It is finalized by recording an establishment document. Among other things, that document must include "a statement describing the ambiguity, uncertainty, or dispute being resolved" and a new legal description of the established boundary. The document "may not be used to create a new parcel or new lot," and recording it "does not constitute a land use approval by a municipality or a county" (Utah Code 57-1-45, version effective November 6, 2025).
4. If you cannot agree, a court decides. In Washington, when boundaries "have been lost, or by time, accident or any other cause, have become obscure, or uncertain, and the adjoining proprietors cannot agree to establish the same," one or more of them may bring a civil action in equity in superior court. The court "may order the parties to utilize mediation before the civil action is allowed to proceed" (RCW 58.04.020).

How to check property lines and acreage on vacant land before an offer

Vacant land may have no fence, no building and no street address. An address typed into a map returns a point, not a parcel, and our guide to address geocoding vs. parcel boundaries shows how to match the point to the right parcel. If the price is set per acre, the lines also decide what you pay.

Where the lines show up in the deal documents

• The deed and the contract. West Virginia's parcel guidance says: "Before purchasing property, a purchaser should compare the GIS tax map of the property intended to be purchased with the proposed legal description of the property as it will be conveyed in a deed" (West Virginia acreage guide).
• The title commitment. On the Texas commitment form, Schedule B item 2 excepts "Any discrepancies, conflicts, or shortages in area or boundary lines, or any encroachments or protrusions, or any overlapping of improvements." The form's opening notice says that to get that exception amended, "you must furnish a survey and comply with other requirements of the Company." On the owner's policy, "you must pay an additional premium for the amendment." If the survey is acceptable to the company and its other requirements are met, the policy will insure against loss from discrepancies or conflicts in boundary lines, encroachments or protrusions, or overlapping of improvements. The company "may then decide not to insure against specific boundary or survey problems by making special exceptions in the Policy" (Texas Form T-7).

What to check before an offer

1. Is it the right parcel? Match the parcel number, the legal description and the listing map. If they disagree, find out why.
2. Which acreage is the price based on? Compare the deeded and the GIS figures. West Virginia's guide says that if exact acreage, area or distances are "material to a purchase, then the property owner likely needs a current survey."
3. Does the description close? Check whether its calls end at the point of beginning. The metes and bounds guide shows how to check closure with a calculator.
4. Where is the front line? Measure from the right-of-way, not the pavement, as Linn County advises above. A line along a road is also not a right to use it. See road frontage vs. legal access.
5. What is on the ground? Ask the seller for any prior survey, then walk the corners. Note the monuments, and any fence, path or driveway that does not match the map.
6. Is the parcel a legal lot? Asked whether the parcels on its maps are legal parcels, Sacramento County's assessor answers "Not necessarily" and sends owners to the planning department of the local jurisdiction.
7. Is a survey a condition of the deal? If the lines or the acreage drive the price, say so in the contract.

Where Pillar fits

Pillar's property search shows a parcel's mapped outline with the ownership, acreage, zoning and land use from its record, so you can screen a site and see which county holds its deed and plat. The outline is a screening reference, like any GIS parcel map. It is not a survey.

Quick answers

How do I find my property lines for free? Look for a survey in your closing papers, read the legal description on your deed, pull the recorded plat, open the county GIS parcel viewer and look for the corner pins. Treat the result as an estimate until a surveyor confirms it.

Who do I call to find my property lines? A licensed land surveyor. The county office that records deeds can supply your deed and plat.

Can I find property lines on Google Maps? Google's help pages describe no property line layer. The only borders they describe are international, state and province borders. Use your county's parcel viewer.

How accurate are GIS property lines? It varies by county. Nevada County, California reports errors from a few feet to 150 feet in some areas. Van Buren County, Michigan says some lines may be off 20 feet or more.

Is there an app to find property lines? Yes, but none is a survey. onX says its lines rest on third-party data, and GPS.gov puts a typical smartphone within a 4.9 meter (16 foot) radius under open sky.