A cadastral survey is a licensed surveyor’s legally recognized determination of where a parcel of land’s boundaries actually sit. It combines field measurement with analysis of deeds, prior surveys, and boundary law to produce a plat and legal description that courts, title companies, and local governments will rely on. You generally need one when you’re buying or selling land, subdividing a lot, applying for building permits, resolving a boundary disagreement, or satisfying a lender or title insurer who wants to know exactly what the deed covers.
What the Survey Produces
The deliverable is a plat: a map showing boundary lines with precise measurements and directions, the physical markers (monuments) at each corner, and any easements, rights-of-way, or encroachments affecting the property. The plat carries directional orientation, references to any coordinate system used, and the surveyor’s signed certification.
The part that matters most legally is the written legal description. That’s the text a court would use to decide exactly what land a deed conveys. In roughly 30 states, descriptions follow the Public Land Survey System, which identifies parcels by township, range, and section down to quarter-quarter sections of about 40 acres.1Office of the Law Revision Counsel. 43 USC Ch 18 – Survey of Public Lands In older states, mostly along the East Coast, descriptions use metes and bounds: a narrative of directions and distances tracing the boundary from a known starting point.
How It Differs From Other Surveys
People use “land survey” loosely, and ordering the wrong one wastes money.
A boundary survey is the most common residential type. It locates and marks property corners and lines, and it overlaps heavily with a cadastral survey. The distinction is largely one of formality and scope: “cadastral” tends to describe boundary work that feeds into an official land records system or involves government land.
An ALTA/NSPS land title survey is a boundary survey performed to stricter national standards jointly set by the American Land Title Association and the National Society of Professional Surveyors. It adds improvements, easements, and other details that title insurers and commercial lenders need. The 2026 edition of those standards took effect on February 23, 2026.2American Land Title Association / National Society of Professional Surveyors. Minimum Standard Detail Requirements for ALTA/NSPS Land Title Surveys If you’re involved in a commercial real estate transaction, this is almost certainly what your lender or title company will require.
A topographic survey maps elevation, contours, trees, buildings, and drainage. Architects and engineers use it to design structures and plan grading. It does not establish legal boundaries, so it is not a substitute when boundary questions are what you need answered.
For a conventional home purchase, a standard boundary survey is usually enough. For commercial deals or situations where you want the broadest possible title coverage, the ALTA/NSPS version is the right call.
When You Need a Cadastral Survey
Buying or Selling Property
A survey before closing tells both sides exactly what’s being transferred. Without one, you’re relying on a legal description that may be decades old and on assumptions about where fences and driveways sit relative to the actual line. Discovering after closing that a neighbor’s garage sits two feet onto your lot, or that your parcel is smaller than the listing claimed, costs far more to fix than the survey would have cost up front.
Subdividing Land
Splitting a larger parcel into smaller lots requires a survey to establish the new boundaries, create a legal description for each lot, and produce a subdivision plat that local government will accept for recording. Without recorded boundaries, the new lots can’t receive separate deeds or be sold independently.
Development and Permitting
Building permits, zoning compliance, and setback requirements all depend on knowing where the property lines fall. A survey confirms that a proposed structure won’t violate setback rules or encroach on an easement. Skipping it can produce a stop-work order, forced demolition, or a variance process that stalls the project for months.
Boundary Disputes
When neighbors disagree about where one property ends and another begins, a cadastral survey provides an impartial determination based on recorded deeds and physical evidence. Courts routinely rely on licensed surveyors’ findings in these cases, so a current survey strengthens your position if the dispute escalates.
Mortgage and Lending Requirements
Lenders want confirmation that the property securing their loan matches the legal description in the deed. Many require a survey as a condition of the mortgage, particularly for rural or unplatted land. Even when the lender doesn’t demand one directly, the title insurer often will, for the reason covered next.
Title Insurance and the Survey Exception
A standard title policy typically excludes coverage for anything “that would be disclosed by a survey”: encroachments, boundary overlaps, and differences between the recorded description and the land as actually used. That exclusion is called the survey exception, and it’s a real gap. If you later find that your fence sits on your neighbor’s land or that a utility easement cuts through your planned addition, the insurer can point to the exception and deny the claim.
To remove the exception, the title company needs a properly certified survey showing the property’s actual condition. For commercial transactions, that almost always means a full ALTA/NSPS survey, which under the 2026 standards must carry a specific certification statement confirming compliance.2American Land Title Association / National Society of Professional Surveyors. Minimum Standard Detail Requirements for ALTA/NSPS Land Title Surveys Most commercial lenders require the loan policy to be issued without the survey exception, which makes the survey a closing prerequisite in practice.
Encroachments and Adverse Possession
Surveys don’t only prevent disputes. They sometimes expose them. If a surveyor finds that a neighbor’s structure crosses your boundary, that’s an encroachment, and dealing with it promptly matters. Let it sit too long and the neighbor may eventually gain a legal right to continue using your land through adverse possession.
Adverse possession laws vary by state, but the pattern is consistent: if someone uses your land openly and continuously for a statutory period (as few as 5 years in some states, as many as 20 in others), they can claim ownership of the occupied area. Getting a survey when you buy, and acting on what it shows, is one of the most reliable ways to prevent that. If the survey reveals a fence or building on the wrong side of the line, you still have options: negotiate an easement, adjust the boundary by agreement, or seek a court order.
How the Process Works
A cadastral survey runs in three phases.
Record research comes first. The surveyor gathers deeds, prior plats, subdivision maps, and records for neighboring parcels to understand how the property was originally created and what evidence should exist in the field. In PLSS states, that includes tracking down the original government survey notes and any later resurveys. A surveyor who skips this phase and goes straight to fieldwork is guessing.
Fieldwork follows. The surveyor locates existing monuments, measures angles and distances, and notes fences, walls, and buildings in relation to the expected boundary. When old monuments are missing, which is common on properties with a long construction history, the surveyor looks for secondary evidence like reference pins, fence lines matching old plats, or features shown on historical plans.
Analysis and plat preparation close out the job. The surveyor compares field measurements against the record research, resolves discrepancies using established boundary-law principles, and produces the final plat showing boundaries, monuments, easements, and any encroachments found. The signed, certified plat gets recorded with the local land records office, where it becomes a document that future surveyors, title companies, and courts can rely on.
For a straightforward residential lot, the whole process takes one to three weeks. Complex properties with unclear title history, heavy vegetation, or difficult terrain take longer. If you have a closing deadline, tell the surveyor at the start; scheduling fieldwork is usually the bottleneck.
Who Can Perform One
Every state requires that cadastral and boundary surveys be performed by a Professional Land Surveyor licensed in that state. Licensure means passing a national fundamentals exam, completing a supervised internship, and passing a state-specific principles and practice exam.3National Society of Professional Surveyors. Surveyors Professional Qualifications People who have passed only the fundamentals exam are surveyor interns and cannot certify surveys independently.
Verify any surveyor’s license through your state’s board of registration for professional engineers and surveyors; most offer an online lookup. Titles vary by state (Professional Land Surveyor, Registered Land Surveyor, Licensed Surveyor), but the licensing requirement itself is universal. A survey certified by someone without a current license in your state has no legal standing. Where state rules conflict with ALTA/NSPS standards, the surveyor must follow whichever is more stringent.2American Land Title Association / National Society of Professional Surveyors. Minimum Standard Detail Requirements for ALTA/NSPS Land Title Surveys
What It Costs
A standard residential boundary survey on a typical lot (roughly an acre or less with clear access) generally runs $500 to $1,500. Costs rise for larger parcels, heavily wooded or sloped terrain, complicated title history, or missing monuments that have to be re-established. Flood-zone properties that also need an elevation certificate run higher still.
An ALTA/NSPS land title survey costs substantially more, generally $2,500 to $10,000, because of the extra research, detail, and certification requirements. It’s standard for commercial transactions and overkill for most residential purchases.
On top of the surveyor’s fee, recording the plat with your local land records office carries a filing fee that varies by jurisdiction, typically from around $10 to over $100 depending on the county and the number of pages. Ask the surveyor’s office whether their quote includes recording. Some handle it; some leave it to you.
How Long a Survey Stays Usable
Surveys don’t carry a formal expiration date, but their usefulness fades. A survey from five or ten years ago may still be reliable if nothing has changed: no new construction, no boundary adjustments, no new easements. If the property has been improved, if neighboring lots have been subdivided, or if monuments have been disturbed, an older survey may no longer reflect reality.
Lenders and title companies are the practical gatekeepers. Many won’t accept a survey more than a few years old, especially if new improvements have gone in since it was completed. Before assuming an aging survey will carry you through closing, ask your lender and title company whether they’ll accept it. Updating an existing survey is usually cheaper than commissioning a new one, because the surveyor can build on the prior work rather than starting over.