Summary:
Most Nassau County homeowners don’t think about a land survey until something goes wrong. The fence contractor is booked, the permit application is in, and then the building department sends it back — because the survey on file is from 2009, or it’s the wrong type, or there isn’t one at all. Now the project stalls, the contractor slot disappears, and the whole thing gets pushed to next year.
That’s the scenario this page exists to help you avoid. Whether you’re still in the planning stage or already mid-process, here’s a clear-eyed look at what hiring a surveyor for a fence installation on Long Island actually involves — and what to look for when you’re choosing who to trust with it.
What Is a Land Survey for a Fence — and Which Type Do You Actually Need?
There are several types of land surveys, and not all of them are right for fence installation. A topographic survey maps the contours and elevations of your land. A house location survey — often called a mortgage survey — shows where your structures sit on the lot. These are useful for other purposes, but neither one is what your fence contractor or building department needs.
For a fence, what you need is a boundary survey. That’s the survey type that establishes your legal property lines, identifies the corners of your lot, and — critically — places physical markers in the ground that your contractor can actually follow. A boundary survey also uncovers any easements that might restrict where a fence can go, and flags any existing encroachments from neighboring structures or landscaping.
Boundary Survey for Fence: What It Delivers and Why It Matters
A boundary survey isn’t just a piece of paper. When it’s done correctly, a licensed surveyor visits your property, researches your deed records, locates any existing monuments or corner pins, and then physically stakes your property corners — placing iron pins or rebar at the verified boundary points your fence contractor will use to guide the installation.
You also receive a certified survey map showing your lot dimensions, the location of your property lines, any easements running through the property, and any encroachments that exist. That map is a legal document. It’s what Nassau County building departments accept when you apply for a fence permit, and it’s what protects you if a neighbor ever challenges where your fence sits.
Here’s why this matters more in Nassau County than in most places: lots here are small. A lot of the housing stock across Levittown, East Meadow, Massapequa, and similar communities was built in the post-WWII era, when parcels of 6,000 to 10,000 square feet were standard. On a lot that size, a fence placed six inches in the wrong direction can cross a property line. That’s not hypothetical — it’s a situation that comes up regularly, and it’s almost always the result of someone skipping the survey step or relying on an old one.
The other thing worth knowing: Nassau County has 64 incorporated villages, spread across three towns and two cities, and each one administers its own building permits. The Village of Westbury, for example, requires a permit for any fence four feet or higher and specifies that street-facing fences must be of open construction. What applies in Westbury doesn’t necessarily apply in Roslyn or Plainview. A surveyor who knows Nassau County’s municipal landscape understands these differences and can ensure your survey meets your specific village’s permit requirements — which means no delays down the road.
Survey for Fence Line: Why Your Old Mortgage Survey Isn't Enough
This is the most common misconception we run into. A homeowner has a survey from when they bought the house, it’s sitting in a drawer somewhere, and the assumption is that it’s still good. For many purposes, it might be. For fence installation, it usually isn’t — and here’s why.
First, a mortgage survey is designed for the lender, not for construction. It maps what exists on the lot at the time of purchase. It typically does not stake corners in the field, which means your fence contractor has no physical markers to follow — just a map with dimensions they’d have to interpret themselves. That’s not a reliable way to guide a fence installation.
Second, conditions change. Survey pins can be moved. Utility companies sometimes relocate them when installing gas or water lines. A construction crew on an adjacent property might disturb them. A neighbor might have shifted them — intentionally or not. A pin that was accurate in 2011 may not reflect the current legal boundary in 2025.
Third, a fence line survey needs to account for anything that’s changed on or around your property since the last survey was done. New structures, landscaping, sheds, additions on neighboring lots — all of these can affect how a current boundary determination is made and what it reveals. A surveyor who pulls fresh deed records and does current fieldwork gives you a result you can actually rely on. One who works off your old paperwork is just confirming what someone else found years ago.
If your survey is more than a few years old, or if it was a mortgage survey rather than a full boundary survey, the safe move is to get a current one before the fence goes in. The cost of doing it right is a fraction of what it costs to tear out and rebuild a fence that ended up in the wrong place.
How to Choose the Right Surveyor for a Fence Project in Nassau County
Once you understand what type of survey you need, the next question is who to hire. Not all surveyors are equal, and in a market as fragmented as Nassau County — with its layers of municipal rules, old deed records, and dense lot configurations — local experience genuinely matters.
There are a few things worth looking at before you make a call. New York State law requires that only a licensed land surveyor can make a boundary line determination. That’s not optional, and it’s not just a credential to check off — it’s the legal standard. You can verify any surveyor’s license through the NYS Office of the Professions. Beyond licensure, you’re looking for someone who knows Nassau County specifically, can tell you exactly what you’ll receive and when, and has a track record you can actually read.
What to Ask a Nassau County Surveyor Before You Hire Them
A few direct questions will tell you a lot about whether a surveyor is the right fit for your project.
Ask them what type of survey they’ll perform. If they’re vague or give you a generic answer, that’s a signal. For a fence installation, you want a boundary survey with physical staking — not just a map, and not a topographic survey. A surveyor who can explain clearly what they’ll deliver and why is one who actually understands the work.
Ask how long they’ve been working in Nassau County specifically. Long Island’s deed history is layered, and the municipal structure here is genuinely complex. A firm that primarily works in Suffolk County or the five boroughs may not have the same familiarity with Nassau County’s building departments, its village-level permit requirements, or the particular challenges that come with the county’s older housing stock. Decades of local experience translates directly into fewer surprises on your project.
Ask for a turnaround time in writing. Fence installation is often time-sensitive. Contractors get booked out, permit windows open and close, and the season doesn’t last forever. A surveyor who can give you a specific, committed timeline — not a vague “a few weeks” — is one who respects your project schedule. There’s a real difference between an eight-day turnaround and one that stretches to two months, especially when you’ve already lined up a contractor.
Finally, ask what you’ll receive. The answer should include a certified survey map and physical corner stakes in the ground. If a surveyor can’t tell you clearly what the deliverables are, that’s worth paying attention to.
Fence Line Survey Red Flags: What Should Give You Pause
Most homeowners don’t hire surveyors often enough to know what warning signs look like. A few things are worth watching for.
A surveyor who can’t confirm NYS licensure upfront is a non-starter. In New York, the boundary determination that a fence survey requires can only be made legally by a licensed professional. If someone is offering to “find your property line” without being able to point you to their license, walk away.
Extremely low pricing that seems out of step with the market can also be a sign of corners being cut. A fence boundary survey in Nassau County involves deed research, fieldwork, measurement, and a certified map. That work takes time and expertise. A quote that’s dramatically lower than what other licensed surveyors are offering may reflect a survey that skips steps — and a survey that skips steps can leave you with a fence in the wrong place and no legal protection to stand on.
Poor communication is another red flag that’s easy to overlook until it becomes a real problem. If a surveyor is slow to return calls, vague about timelines, or unclear about what you’ll receive, that pattern tends to continue throughout the project. There are documented cases of homeowners paying for a survey, waiting months without an update, and eventually discovering the surveyor has stopped responding entirely. By that point, the fence contractor has moved on, the season is over, and the homeowner is back to square one.
What you’re looking for is a licensed surveyor with real Nassau County experience, a specific turnaround commitment, and a clear explanation of deliverables — including physical stakes in the ground, not just a map. That combination is not hard to find if you know what to ask for.
Ready to Move Forward? Here's What the Right Survey Gets You
A fence is a significant investment. On Long Island, where lot sizes are tight, property values are high, and building departments review permit applications carefully, the survey that precedes it isn’t an optional add-on — it’s the step that makes everything else work.
The right boundary survey gives your contractor physical markers to follow, gives your building department the certified documentation it requires, and gives you a legal record that protects your investment if questions ever come up down the road. Done correctly, it takes days — not months — and it costs a fraction of what a misplaced fence costs to fix.
If you’re planning a fence project in Nassau County and want to understand exactly what a survey involves and what it will cost for your specific property, we at Islandwide Land Surveyors have been doing this work across Long Island for over 50 years. Call us for a free, no-obligation quote and we’ll walk you through the process from the first question to the final stake.
