Land surveys are performed by licensed professional land surveyors — state-credentialed specialists who research deeds, measure the ground with GPS and total stations, and produce a signed and sealed plat that courts, lenders, and local governments will accept. They are not hobbyists with tape measures. In every state, surveying is a licensed profession, and only a current license holder can sign off on a boundary determination that carries legal weight.
If someone offers to mark your property lines but can’t produce a license number, their work has no standing. An unsigned sketch is not a survey.
What a Licensed Surveyor Is
A land surveyor’s job is to establish exactly where your property begins and ends. That involves three layers of work: pulling recorded deeds, plat maps, and prior surveys to see what the legal description says the parcel should be; going out with GPS receivers and total stations to see what’s actually on the ground; and reconciling the two into a single authoritative drawing. Surveyors also map elevations, contours, easements, and the locations of structures and natural features. Their work feeds into title insurance policies, building permits, and court cases.
The license is what makes any of this count. A survey plat signed and sealed by a licensed surveyor is the document courts, lenders, and municipalities rely on when property lines are in question.
How Someone Becomes Licensed
The path is deliberately long. Many states now require a four-year bachelor’s degree in surveying or a closely related field, though some accept a two-year degree with additional experience.1National Society of Professional Surveyors. Surveyors’ Professional Qualifications After the degree, candidates sit for the Fundamentals of Surveying (FS) exam, a nationally standardized test administered by NCEES.2NCEES. FS Exam
Passing the FS earns the title of Surveyor Intern or Surveyor-in-Training, but it does not authorize independent practice. Interns then work a supervised internship — typically four years — under a licensed professional before sitting for the Principles and Practice of Surveying (PS) exam.1National Society of Professional Surveyors. Surveyors’ Professional Qualifications Only after both exams and the internship can someone sign and seal survey documents.
When You Need to Hire One
Buying or Selling Property
Mortgage lenders frequently require a survey before closing, particularly for commercial properties. An ALTA/NSPS Land Title Survey is the industry standard for commercial transactions, and title insurance companies use it to decide whether to remove broad survey-related exceptions from their policies.3National Society of Professional Surveyors. 2026 ALTA/NSPS Standards Residential lender requirements vary. Some accept a lighter mortgage location survey; some skip the survey entirely if title insurance is in place. Even where no one requires one, buying without a current survey is a gamble. The fence you thought marked the line can turn out to sit six feet onto your neighbor’s land.
Building, Fencing, or Adding On
Many municipalities require a survey before issuing permits for additions, fences, pools, or accessory structures. Setback rules — the minimum distance a structure must sit from the line — can’t be verified without knowing where the line is. A contractor who eyeballs the setback and gets it wrong can leave you tearing down a finished project.
Splitting a Parcel
Dividing land into smaller lots requires a licensed surveyor to prepare a subdivision plat, which then gets filed with local and often state agencies. There is no workaround here. You cannot legally create new lots without a professionally prepared and recorded plat.
Settling a Boundary Dispute
When neighbors disagree about where one property ends and the other begins, a survey is the first step toward resolution. Courts rely on survey evidence when deciding boundary disputes, and a current survey from a licensed professional carries far more weight than a homeowner pointing at an old fence.
Match the Survey Type to Your Reason for Hiring
Not every survey serves the same purpose, and ordering the wrong type wastes money. The common types:
- Boundary survey. Establishes exact property corners and lines through deed research, calculations, and physical measurements. The surveyor typically sets iron pins or other permanent markers at each corner. This is the survey you need for building projects, fence installation, lot splits, and neighbor disputes.
- Mortgage location survey. A lighter report that verifies the deed description matches what’s on the ground. It uses higher tolerances than a boundary survey and does not physically mark corners. Lenders and title companies use these to confirm structures sit on the land being transferred. Not sufficient for installing improvements or resolving disputes.
- Topographic survey. Maps elevations, contours, trees, drainage, and existing structures. Engineers and architects need this before designing grading plans, stormwater systems, or foundations.
- ALTA/NSPS Land Title Survey. The most detailed type, jointly standardized by the American Land Title Association and the National Society of Professional Surveyors. It combines boundary and topographic elements with information on easements, encroachments, and improvements. The 2026 standards took effect February 23, 2026, and any new survey agreements on or after that date must follow them. Clients can request optional “Table A” items covering flood zone classification, zoning setback mapping, building dimensions, parking counts, and underground utility evidence.4American Land Title Association / National Society of Professional Surveyors. Minimum Standard Detail Requirements for ALTA/NSPS Land Title Surveys5American Land Title Association / National Society of Professional Surveyors. Minimum Standard Detail Requirements for ALTA/NSPS Land Title Surveys – Table A
- Construction survey. Stakes out proposed buildings, roads, and utilities on the ground so contractors can build in the right locations. Done after design and before dirt moves.
- Subdivision survey. Divides a larger parcel into individual lots with new legal descriptions, producing the recorded plat that allows each lot to be sold separately. These are time-consuming because of the calculations, new monumentation, and government review involved.
What It Costs and How Long It Takes
A standard residential boundary survey on a lot under one acre generally runs between $1,000 and $5,500. Turnaround from hiring to final delivery is about one to two weeks for a straightforward residential boundary survey. ALTA/NSPS surveys for commercial properties can cost substantially more — often several thousand dollars and up — because of the extra research, Table A items, and certification work involved, and they commonly take four weeks or more.
Several things move the price:
- Lot size. A small urban lot costs less than a multi-acre rural parcel. Larger properties cost more in total but less per acre.
- Terrain and vegetation. Flat, open land is faster than wooded hillsides or swampy ground. Dense cover can hide existing markers and slow fieldwork.
- Record availability. Clean prior surveys and clear deeds make research quick. Missing or conflicting records add hours of investigation.
- Survey type. A mortgage location survey costs less than a boundary survey, which costs less than an ALTA/NSPS survey.
- Location. Metro areas tend to cost more than rural ones, with meaningful regional variation.
- Rush work. Tight deadlines carry a premium. Two weeks from closing is not the time to start shopping on price.
How to Find and Vet a Licensed Surveyor
Every state has a licensing board that maintains a directory of currently licensed land surveyors. Searching your state’s board website is the most reliable way to confirm someone is properly credentialed. The National Society of Professional Surveyors and state-level surveying associations also maintain “find a surveyor” directories listing members in private practice.
When comparing quotes, ask what’s included. Some cover everything from research through final plat delivery; others charge separately for research time, travel, monument setting, or additional copies. Ask about turnaround and whether the surveyor regularly handles your type of job. An ALTA/NSPS survey calls for familiarity with standards that not every residential surveyor works with. Confirm the deliverable will be a signed and sealed plat. An unsigned sketch or verbal opinion isn’t worth paying for.
What to Hand Over Up Front
The more you share at the start, the faster and more accurate the work. Begin with the property deed and its legal description, which is the surveyor’s primary reference. Share any prior survey plats you have, even decades-old ones; they often contain reference points and monument locations that save fieldwork time. Tell the surveyor why you need the survey, since a setback verification for an addition is a different scope than a dispute with a neighbor. Flag any specific concerns up front — an encroaching fence, a rumored easement, drainage trouble — because surveyors focus their effort based on what you tell them, and holding information back just means paying for a second visit.
If the Surveyor Gets It Wrong
Survey errors have expensive consequences. A misplaced line can lead to building on a neighbor’s land. A mismapped easement can block access. A wrong elevation can cause drainage problems. Licensed surveyors carry professional liability insurance — also called errors and omissions coverage — for exactly these situations.
If a survey error causes you financial harm, you may have a claim for negligence or breach of contract. Statutes of limitations vary by state but commonly run two to four years from when you discovered or should have discovered the error. Many states also impose statutes of repose that set an absolute outer deadline regardless of when you discover the problem. If you suspect an error, consult a real estate attorney promptly. Waiting too long can forfeit the right to recover.