How to Find Your Property Lines

A property line is the recorded boundary between one parcel of land and another. Where that line runs on paper and where it runs on the ground are not always the same thing, which is why there is more than one way to find it.

The six methods below go from quick and approximate to slow and definitive. Most people only need the first few. If you are about to build something, buy land or argue about a boundary, you will need the last one.

1. Check a Parcel Map

A parcel map shows how land in an area is divided into parcels. Each parcel gets an outline, and most maps also show its parcel number (APN) and often its acreage. Counties publish them on their GIS websites, and mapping apps display the same kind of data.

To use one, search for your address or find your location on the map, then look for the outline around your property. Compare it with things you can see: the road, your house, the driveway and your neighbors' buildings.

If your county runs its own viewer, start there. It is usually on a .gov address and free to use. A site that asks for a credit card before showing a parcel is probably not the county.

This is the best first step because it is fast, usually free and shows your neighbors' parcels too. The limit is accuracy. The lines are drawn from records, so they are approximate and can sit several feet from where the true boundary runs. Freshness is a second limit: Pitkin County, Colorado says it can take up to sixty days from the recording of a property change to the moment the new data is public. This guide explains why lines drift.

2. Look for a Plat Map

A plat is a scaled drawing of a subdivision. It is prepared when land is divided into lots and filed with the county. Generally, a plat shows the lot lines with their lengths, lot and block numbers, streets and easements.

That makes it different from an online parcel map. A parcel map is a picture assembled mainly for tax and administration. A plat is the original recorded drawing, and it often carries measurements such as "75.00 ft" along each side of a lot. If you live in a subdivision, the plat can tell you how wide your lot is supposed to be, which you can then compare with what is on the ground. Plats also typically show where surveyors set pins, which is the starting point for the corner search in method 4.

A deed that says "Lot 7, Second Addition" is pointing you at a plat. You can usually find plats through the county recorder, register of deeds or clerk, and many counties have scanned copies online. Your closing documents may also include one. Not every property has a plat. Rural land is often described in other ways, such as by metes and bounds. Parcel Map vs Plat Map covers the difference in detail.

3. Check Your Property Records

Property records tell you what has been officially recorded about the parcel. A few terms come up:

• APN or parcel number. The ID the county assigned to the parcel. See What Is an APN?
• Legal description. The formal, written description of the land in your deed. It is not the same as your street address.
• Recorded documents. Your deed, any recorded plat, easements and surveys that were filed with the county.

Your deed's legal description is the formal definition of what you own. A survey is how someone interprets that description on the ground. Some deeds give no measurements or landmarks and simply refer back to an older deed. If yours does, keep following the references back until you reach one that describes the boundary.

Also look for an earlier survey. Your lender, your title company and the county recorder may each hold one, and some counties keep survey records in a separate engineering or survey office. A past survey can save you a lot of work.

Your tax bill and the county assessor's website are the easiest places to start. They list the parcel number, which you can then use to find the parcel on a map. If you do not have it yet, look for it on your tax bill. One thing the assessor will not do is tell you where your line is. Snohomish County's assessor, for example, says it has no ability to define, determine or locate property boundaries.

4. Look for Property Markers

When land is surveyed, the surveyor often sets markers at the corners. These can be iron rods or pipes (often called pins), concrete monuments, or wooden stakes. Some have a cap stamped with a surveyor's license number.

Corner markers are often at or just below ground level, so you may need to clear leaves and brush. A metal detector helps with iron. If you plan to dig, call 811 first so buried utilities are marked. The call is free, and some states build in a wait. Kentucky and Texas both ask for two working days before you dig. How to Find Property Corners has the full search routine.

Other things you can see on the ground are weaker evidence. A fence, a row of shrubs, a utility box or a joint in the sidewalk may sit near the line, but each was put there for its own reasons by someone who may not have had a survey. Treat them as hints about where to look, and nothing more.

5. Use GPS as a Reference

Your phone's GPS shows where you are standing. When you view it on a parcel map, you can see your position relative to the mapped boundary. That is very useful for finding your way around a large or wooded property and for getting a rough idea of where a line runs.

GPS.gov says smartphones are typically accurate to within a 4.9 m (16 ft) radius under open sky, and that accuracy worsens near buildings, bridges and trees. The parcel line on the map has its own error on top of that. So GPS answers "roughly where is the back corner?" but not "is this stake exactly on the line?". The details are in How to Find Property Lines With GPS.

6. Hire a Licensed Surveyor

A licensed land surveyor researches the records, measures the land, finds or sets the boundary markers and gives you a signed drawing of where the boundary is. This is the only method on the list that determines the line rather than approximating it.

Hire a surveyor when:

• you are putting a fence or wall directly on the boundary;
• you are building close to a boundary;
• you are in a dispute with a neighbor;
• you are buying or selling and the boundary is unclear;
• you have a question about an easement or a right of way.

Published price guides disagree widely, from a few hundred dollars into the thousands. Terrain, lot size, how many corners there are and how clear the records are all move the number, so get a couple of quotes. When you call, ask whether the job includes marking the corners and whether it ends with a signed drawing. If you only need the line staked for a fence, a partial job may cost less than a full boundary survey. Check the surveyor's state license, and ask whether they will walk the lines with you afterward. For a side-by-side comparison, read Property Line Map vs Land Survey.

Which Method Should You Use?

Common Mistakes

• Assuming the fence is the boundary. Fences are often built a little inside or outside the true line.
• Assuming satellite imagery lines up perfectly with parcel lines. It often does not, and a few feet of offset is common.
• Treating phone GPS as survey-grade. It is not.
• Mixing up an address and a parcel. One address can cover several parcels, and some parcels have no address.
• Trusting the first marker you find. It may not be a corner at all.

What If the Sources Disagree?

It happens. The parcel map may place a line a few feet from where the plat says it should be, or a marker may not match either one. In general, recorded documents such as the deed and plat carry more weight than a map drawn from them. But when sources disagree, you are not going to settle it by looking at more maps.

Frequently Asked Questions

Can I find my property lines for free?

Yes, up to a point. A county parcel viewer, your deed, a recorded plat and a metal detector cost little or nothing. They tell you roughly where the line is. They do not replace a survey when the exact line matters.

Do I need a surveyor just to find my property line?

Not for general curiosity or planning. You do when something depends on the exact line, such as a fence, a new building or a disagreement with a neighbor.

Who can tell me where my property line is?

A licensed land surveyor. County assessors map parcels for tax purposes and generally state that their maps are not surveys, so they will not mark the line for you.

Do Google Maps and property line apps show the exact line?

No. Where they show boundaries at all, the lines come from county or data-provider records and are approximate. Coverage also varies by place.

Can AcreBound Show Property Lines?

AcreBound lets you view mapped parcel boundaries, search properties and use your phone's location while exploring land. You can search by address, APN, owner name or coordinates, then tap a parcel to see its outline, APN, acreage and other details. Features such as GPS Property Line Mode and on-map measurement are part of AcreBound Pro.

It is useful for general property research and field reference. Parcel boundaries shown in mapping applications should not be treated as a replacement for a licensed boundary survey. To see where AcreBound has parcel data, check the coverage pages, or read more about the Property Line Finder.

Sources

• GPS Accuracy (GPS.gov) Smartphone accuracy under open sky and what degrades it.
• Pitkin County Parcel Disclaimer (Colorado) How one county builds its parcel layer and how often it updates.
• Snohomish County Assessor FAQ (Washington) What a county assessor can and cannot tell you about boundaries.
• About Assessor Parcel Maps (Sacramento County Assessor) Assessor maps are not surveys; where survey records are kept.
• The 811 Process (Kentucky 811) Free locate requests and the two-working-day wait.
• What To Expect When You Contact Texas811 Free locate requests and the two-working-day wait.