How to Get Property Lines Marked

If you want to know how to get property lines marked, work through this list from cheapest to most reliable:

• Pull your deed and recorded plat map from the county recorder or assessor.
• Check your county’s GIS parcel map online, free of charge.
• Look for an existing survey and the iron pins it left at your corners.
• Hire a licensed land surveyor to physically stake and legally document the line.
• Use a phone app for a rough idea only, never as proof.

Only a licensed survey legally establishes your boundary and drives real stakes into the ground. Every other method here helps you find property lines closely enough to plan around. None of them is exact enough to build against.

Start with your deed and recorded plat map

Your deed’s legal description and the recorded plat map spell out your boundary dimensions, and you can pull copies from the county recorder or assessor for a small fee.

Older deeds describe boundaries by metes and bounds: a starting point, then a string of compass bearings and distances that walk the perimeter of your lot (“thence north 42 degrees east, 150 feet…”). Newer subdivisions usually use lot-and-block instead, referencing a lot number on a recorded plat rather than spelling out every bearing. Either way, this description is the legal definition of your boundary. Everything else on this list is just a way of finding it on the ground.

The plat map itself shows more than your lot lines. Filed when the subdivision was created, it marks easements, rights-of-way, and the dimensions of every lot on the block. If your deed references an easement you don’t recognize, the plat is usually where it gets spelled out.

Your county GIS parcel map lets you find property lines for free

Most counties publish a free online GIS parcel viewer that overlays boundary lines on satellite imagery, and it’s the fastest way to get a general picture of your lot.

Search your county assessor’s or GIS site by address or parcel number. The map will show your lines drawn over an aerial photo, often alongside acreage, zoning, and the last sale price. Use it before you walk the property so you know roughly what you’re looking for.

Treat the result as a sketch, useful for a first look but nothing more precise. County GIS data is built from tax records and old surveys stitched together over decades, and boundary lines can be off by several feet from where your actual corners sit. Good enough to plan where a fence or a garden bed might go. If a neighbor disputes the line, this map won’t settle it.

An existing survey and its corner pins may already mark your lot

If the property has been surveyed before, that survey, plus the iron pins or stakes set at the corners, may already mark your boundary. Check your closing packet or your title company’s file before you pay for anything new.

Most home purchases involve a survey, or at least a survey exception noted somewhere in the title work. Look for a folded document with a drawn boundary and marked corner coordinates. If you have one, the corners are often already in the ground, marked with colored plastic caps stamped with a surveyor’s license number.

Older subdivisions bury these pins under decades of grass and soil. A metal detector is a cheap, reliable way to relocate them once the survey drawing tells you roughly where to look. Sweep the area a few feet around where the plat says the corner should be, and a buried iron rod usually gives a clear signal within a couple of passes.

A licensed surveyor is the only way to get your lines legally marked

Hiring a licensed land surveyor is the one method that physically stakes your corners and produces documentation that holds up legally.

A surveyor researches your deed and any prior surveys, measures your property with survey-grade equipment such as a total station or GPS receiver, and either sets new monuments at your corners or confirms the ones already there. You leave with a signed and sealed survey that a court, a title company, or a contractor will treat as fact. Whether that survey also gets filed with the county depends on your state and what it found. Many states only require recording when a surveyor establishes a boundary line that wasn’t on record before, or turns up an encroachment. A routine confirmatory survey, ordered just for your own peace of mind, usually stays in your own file unless you ask the surveyor to record it.

It’s worth the cost before you build a fence, add an addition, put in an ADU, or sit down to resolve a disagreement with a neighbor. It’s usually not worth it just to double-check where your lawn ends.

Cost depends on your lot size, terrain, and whether a usable prior survey exists to work from.  Call two or three local licensed surveyors for quotes before you commit. Verifying pins that already exist typically costs less than establishing a boundary from scratch, so ask which one you actually need before the quote comes back.

Phone apps get you close, not survey-grade

Consumer parcel apps, LandGlide is a common example, pull the same public GIS data your county already publishes and layer it on top of your phone’s own location signal. Neither one gets you anywhere near what a survey delivers.

Under open sky, a smartphone’s GPS is typically accurate to about 16 feet, according to GPS.gov, and that accuracy gets worse near buildings, trees, or hills. Stack that on top of GIS parcel data that’s already an approximation, and you can end up ten or twenty feet from your real corner.

That’s a fine way to get a sense of your yard while you’re standing in it deciding where a garden bed might go. It won’t hold up if a neighbor disagrees with where you drew the line.

Confirm your line before you fence or build

Before you set a fence post, pour a footing, or add a structure, confirm the exact line plus any setbacks or easements, because building over the boundary can mean tearing out what you just built.

If you own or manage a rental property, this is a five-minute check that protects the asset: a licensed survey costs far less than moving a shed, a deck, or a fence after the fact. If a neighbor’s driveway, pool, or retaining wall already crosses onto your side of the line, that’s an encroachment. Resolving it usually takes a conversation and, if needed, a recorded easement agreement rather than a lawsuit.

Confirming your boundary is one small piece of running a rental property well. Our guide to how to manage a rental property covers the rest, and if you’re still deciding whether to buy, investing in rental property for beginners is a good place to start.

FAQ

How accurate are GPS and phone apps for property lines?

Not accurate enough to build against. Under open sky, smartphone GPS is typically accurate to about 16 feet, according to GPS.gov, and considerably less accurate near buildings or trees. Fine for a general sense of your yard. A survey is what you need before you build.

What’s the difference between a plat map and a survey?

A plat map shows how an entire subdivision was divided into lots when it was recorded, including general lot lines and any easements. A property survey is specific to your parcel: a licensed surveyor measures your actual corners and produces documentation, and often physical stakes, for your lot alone. The plat is the neighborhood’s paperwork. The survey is yours.

Can I find my property lines online?

Yes, for a general picture. Most counties post a free GIS parcel viewer where you can search by address and see your boundary overlaid on a satellite image. Treat it as a starting point. These maps aren’t survey-accurate and can be off by several feet.

How much does it cost to get property lines marked?

It depends on your lot size, terrain, and whether a usable prior survey exists.  Verifying pins that already exist typically costs less than a full new boundary survey, so ask your surveyor which one you actually need before you get a quote.