The Direct Answer
You can walk your property, find old stakes, read your deed, and look at county GIS maps. None of that is illegal, and it can be genuinely useful for understanding what you own. What you cannot do is produce a survey that has any legal standing. Every state in the country requires a licensed Professional Land Surveyor (PLS) to certify a boundary survey. Your own measurements, regardless of how carefully you take them, are not a legal survey and cannot be used for permits, closings, dispute resolution, or recording in public records.
That distinction matters because a lot of DIY boundary research leads people to false confidence. You might locate what looks like a corner pin and feel certain you know where your property line sits. But without a licensed surveyor verifying that pin's position against the deed, the plat, and neighboring parcels, you have no way to know whether that pin is in the right place, was set by the right person, or is still accurate.
What State Law Actually Says
Every state has a licensing statute that defines the practice of land surveying and restricts it to licensed professionals. The specifics vary, but the core principle is the same everywhere: determining or establishing the boundaries of real property is a regulated professional activity.
In most states, practicing land surveying without a license is a misdemeanor. This does not mean you will face criminal charges for walking your land with a tape measure. It means that any document you produce claiming to be a survey has no legal effect, and you could face liability if someone relies on it.
The PLS license is not easy to obtain. It typically requires a bachelor's degree in surveying, geomatics, or a related field, several years of supervised experience under a licensed PLS, and passage of two national exams administered by NCEES (the Fundamentals of Surveying and the Principles and Practice of Surveying). Most states also require a state-specific exam. The path from education to license typically takes six to eight years.
What a Licensed PLS Does That You Cannot
The gap between what a property owner can do and what a licensed PLS can do is significant, and it is not just about equipment.
Legal Certification
A PLS can stamp and sign a survey drawing, which makes it a legally certified document. That certification is what gives the survey weight in court, with lenders, at the permit office, and in the public record. Without it, the document is just a drawing with no legal authority.
Monument Setting
When a PLS sets an iron pin or concrete monument at a property corner, that monument becomes part of the official record of the property. It carries legal significance. A stake you pound into the ground yourself has none. If your neighbor disputes your line, your homemade marker is not evidence of anything.
Deed and Record Research
A PLS interprets legal descriptions, traces chains of title, resolves conflicts between older deeds and modern plat maps, and understands how the government survey system (townships, ranges, sections) works. This research is often the most complex part of a survey. Errors here put the property lines in the wrong location, and a layperson is unlikely to catch them.
Expert Witness Testimony
If a boundary dispute goes to court or mediation, a licensed PLS can testify as an expert witness. Their certified survey is admissible as evidence. Your own measurements are not, and most courts will not even consider them.
Plat Creation and Subdivision
If you want to divide your land into separate lots, a plat document must be created by a licensed PLS and approved by the local government before recording. There is no self-service path for subdividing property.
What You CAN Do Yourself
While you cannot produce a legal survey, there are legitimate things you can do on your own that are useful for personal planning and for understanding your property before you hire a surveyor.
Review Your Deed and Plat
Your deed contains a legal description of the property, either as a lot and block number on a recorded plat (common in subdivisions) or as a metes and bounds description (common in older, rural, or irregular parcels). The recorded plat for your subdivision, available through your county recorder's office, shows the dimensions and layout of each lot. Reading these documents gives you a framework for understanding your boundaries, even though translating them accurately to the ground requires professional training and equipment.
Look at County GIS Maps
Most counties maintain online GIS mapping systems that show parcel boundaries overlaid on aerial imagery. These maps are useful for understanding the general shape and size of your lot. They are not precise enough for any purpose where accuracy in feet or fractions of a foot matters. The parcel lines on a GIS map can be off by several feet, sometimes more, because they are based on recorded data that may not align perfectly with aerial photos.
Search for Existing Monuments
Prior surveys often left physical markers at property corners: iron pins (rebar or steel rod), concrete monuments, aluminum caps, or wooden stakes. You can search for these with a metal detector and careful probing. Finding an existing monument gives you a reference point, but you cannot know without a licensed surveyor whether that monument is in the correct position, was set by a licensed professional, or has been disturbed since it was placed.
Here is a practical approach: before hiring a surveyor, spend an afternoon with a metal detector looking for existing pins at your corners. If you find them, tell the surveyor. It can reduce their field time and your cost, because the surveyor can verify existing monuments rather than setting new ones from scratch.
Use Online Mapping Tools for General Reference
Satellite imagery, public GIS layers, and property data tools can help you visualize your parcel and understand its relationship to roads, neighbors, and natural features. Just remember that none of these tools have the precision needed for legal boundary determination. Consumer-grade GPS is accurate to about 6 to 15 feet under good conditions. Professional survey-grade GPS is accurate to fractions of an inch. That difference is everything.
When You Absolutely Need a Licensed Surveyor
No amount of DIY research substitutes for a licensed PLS in these situations:
- Building a fence: A fence built on the wrong side of the line may need to be removed at your expense. A survey costs $400 to $800 for a typical lot. Moving a fence costs $3,000 to $6,000.
- Adding a structure: Any permitted structure requires compliance with setback requirements measured from the certified property line. Permit offices do not accept owner-produced measurements.
- Resolving a neighbor dispute: A boundary dispute can only be resolved with a certified survey. Courts require licensed professional evidence, not personal measurements.
- Buying or selling property: Lenders and title companies require certified surveys, not owner-produced documents.
- Dividing land: A subdivision plat must be created and certified by a PLS and approved by local government. There is no DIY option.
- Obtaining flood insurance documentation: Elevation certificates must be produced by a licensed surveyor or engineer. Insurance companies require certified documents.
What a Boundary Survey Costs
For context, here are typical costs so you can weigh them against the DIY alternative (which, remember, produces nothing legally usable):
| Property Type | Typical Cost Range |
|---|---|
| Standard platted lot (under 0.5 acres) | $350 to $800 |
| Lot between 0.5 and 1 acre | $500 to $1,200 |
| Rural lot, 1 to 5 acres | $800 to $2,500 |
| Property with missing monuments or complex history | $1,000 to $3,500+ |
Once you receive a professional survey, our guide on how to read a land survey explains every element of the document in plain language. The cost of a survey is almost always less than the cost of the problem it prevents. A denied building permit, a fence removal, or a lost boundary dispute in court will each cost you multiples of what the survey would have.
The Practical Bottom Line
Use county GIS maps, your deed, and your recorded plat to orient yourself on your property. Search for existing corner monuments with a metal detector. These steps are free and genuinely helpful. But when any decision with real consequences depends on where your property line sits, hire a licensed Professional Land Surveyor. The cost of a boundary survey is trivial compared to the cost of getting it wrong.
Every surveyor in our directory is sourced from state licensing records. Find a licensed Professional Land Surveyor in your area and get quotes from surveyors who know your local terrain and records.