Summary:
If you’ve been told you need a survey — by your contractor, your lender, or your building department — and you’re not sure what that actually means for your project, you’re not alone. Nassau County’s permit and zoning landscape is genuinely complex, and the survey requirement isn’t always explained clearly by the people who enforce it. What type of survey do you need? Does your old one count? How long will this take? This guide answers those questions directly, with the kind of local context that actually helps — because Nassau County has some quirks that generic surveying guides simply don’t cover.
Nassau County Building Permits and Required Survey Documentation
Most Nassau County building permit applications require a current survey as part of the submission package. The specific documentation depends on your project type and which building department has jurisdiction — and in Nassau County, that’s not always obvious.
The county is divided into the Town of Hempstead, the Town of North Hempstead, and the Town of Oyster Bay, plus the City of Glen Cove and the City of Long Beach. On top of that, 64 incorporated villages operate their own building departments with their own submission requirements. A permit application in Garden City goes through a different process than one in Mineola, even though the two are less than two miles apart.
Generally speaking, permit applications for new construction, additions, pools, and accessory structures require a plot plan or survey showing your property boundaries, existing structures, and proposed work — all drawn to scale and bearing the seal of a licensed New York State Land Surveyor. We’ve processed thousands of these applications across Nassau County, and the common thread is always the same: your building department needs to see exactly where your property lines are before they’ll approve anything that goes in the ground.
Property Survey Nassau County: What Type Do You Actually Need?
The word “survey” gets used loosely, and that causes real confusion. Your lender, your contractor, and your building department might all say you need a survey — but they’re often referring to different documents.
A boundary survey establishes your exact property lines, confirms the location of your property corners as described in your deed, and identifies any easements or encroachments. This is the most common survey type for permit applications, fence installations, and neighbor disputes. If you’re adding a deck, building an addition, or installing a pool in Nassau County, a boundary survey is almost always the starting point — your building department needs to verify that the proposed structure meets setback requirements before issuing a permit.
A title survey, sometimes called a location survey, is what most buyers encounter at closing. It shows existing structures relative to property lines and gets submitted to the title company and lender. It’s not the same as a boundary survey, and it won’t always satisfy a building department’s requirements for a construction permit.
A topographic survey maps elevation and terrain data across your property. Architects and engineers use these for site planning, grading, and drainage design — particularly relevant in Nassau County’s South Shore communities like Oceanside, Merrick, and Massapequa, where grade changes and drainage patterns directly affect construction feasibility.
If your property sits in or near a FEMA-designated flood zone — common in Long Beach, Freeport, and other South Shore Nassau County areas — you may also need a Flood Elevation Certificate. This documents your building’s elevation relative to the base flood elevation and is required by lenders and insurance carriers for properties in these zones. After Hurricane Sandy in 2012, thousands of Nassau County homeowners needed elevation certificates as part of the home-raising and rebuilding process.
The bottom line: the right survey type depends on your specific project and your specific property. Getting that wrong means delays, resubmissions, and potentially starting over.
Nassau County Zoning Requirements and How Surveys Support Compliance
Zoning compliance is where surveys and permits intersect most directly. Before any Nassau County building department approves a construction permit, they need to confirm that your proposed project meets the setback requirements for your zone — meaning the minimum distances your structure must maintain from property lines, streets, and adjacent buildings.
In Nassau County’s dense suburban neighborhoods, those margins are tight. A typical residential lot in communities like Valley Stream, Rockville Centre, or Westbury might be 60 feet wide with a 5-foot side yard setback requirement. That’s not a lot of room for error. A survey that accurately locates your property corners and existing structures is the only reliable way to confirm compliance before you build, not after.
This is also where Nassau County’s village structure creates real complexity. Each of the county’s 64 incorporated villages has its own zoning ordinance. Setback requirements, lot coverage limits, and permitted uses can differ significantly from one village to the next, even in areas that look and feel like the same neighborhood. A surveyor who doesn’t know the difference between the Town of Hempstead’s zoning standards and the Village of Hempstead’s zoning standards — two separate jurisdictions that share a name — can easily produce documentation that doesn’t satisfy the right building department.
The Nassau County Planning Commission also plays a role for larger projects, reviewing site plans, special use permits, zoning map amendments, and subdivision plats. If your project involves dividing a parcel or requires Planning Commission review, your survey documentation requirements go up considerably. An ALTA/NSPS survey — the high-standard survey used for commercial transactions and development approvals — may be required in these cases, covering boundary, easements, improvements, and encroachments to lender and title company standards.
How Nassau County Survey Requirements Work in Practice
Understanding what’s required is one thing. Understanding how the process actually unfolds — from the moment you call a surveyor to the moment you have a document your building department will accept — is another.
A professional land survey engagement in Nassau County typically starts with a conversation about your project and which jurisdiction has authority over your property. From there, we pull deed records, historical plats, and prior survey data before any fieldwork begins. That research phase matters more than most homeowners realize — especially for older Nassau County properties, many of which were built during the post-WWII suburban boom of the 1940s through 1960s and haven’t had an updated survey in decades.
Can You Use an Old Survey for a Nassau County Building Permit?
This is one of the most common questions we hear, and the honest answer is: it depends — but usually not if anything has changed since the original survey was done.
Nassau County building departments need to see the current state of your property, not what it looked like when you bought it in 1998. If you’ve added a shed, a fence, a deck, or a patio since your last survey, that information isn’t reflected in the old document. Submitting an outdated survey with a permit application for a new addition is likely to trigger a request for updated documentation, which adds time and cost to your project.
There’s also a practical issue with older surveys specifically. Many Nassau County homes were surveyed when they were first sold — often in the 1960s, 1970s, or 1980s — and those surveys may not reflect decades of gradual changes to the property or its surroundings. Easements get recorded. Neighbors build structures. Property corners get disturbed. An outdated survey that doesn’t capture these changes can create real problems when a building department or title company takes a close look.
If your property hasn’t changed since your last survey was completed and the survey is recent enough to satisfy your building department’s standards, an update survey — rather than a brand-new survey from scratch — may be all you need. An update is faster and less expensive because the baseline fieldwork has already been done. We keep records on file for properties we’ve previously surveyed, which means returning clients aren’t starting from zero.
If you’re not sure whether your existing survey is sufficient, the fastest way to find out is to describe your project and share your existing document with a licensed surveyor who knows Nassau County’s specific requirements. A quick review can save you from submitting the wrong documentation.
Working with a Licensed Surveyor Who Knows Nassau County's Specific Requirements
New York State law requires that all property surveys be performed and sealed by a licensed NYS Professional Land Surveyor. That’s not a formality — it’s the standard that makes your survey legally valid and acceptable to building departments, lenders, courts, and title companies. A licensed NYS Land Surveyor must complete a minimum of eight years of combined education and experience, pass a 14-hour national examination, and pass a separate New York State-specific examination. Ongoing continuing education is also required every three years.
What the license requirement doesn’t guarantee is familiarity with Nassau County’s specific jurisdictional landscape. That comes from experience — and in a county with 64 incorporated villages, three town building departments, two city building departments, and a county-level planning commission, experience with Nassau County specifically makes a meaningful difference.
We’ve been surveying Nassau and Suffolk County properties since 1970. That’s more than five decades of accumulated knowledge about local deed records, historical plats, building department submission requirements, and the kinds of boundary complications that show up in Nassau County’s older housing stock. When a property in Syosset has a deed description that doesn’t quite match the recorded plat, or a parcel in Great Neck has an easement that wasn’t disclosed at closing, we’ve seen those situations before — and we know how to handle them.
Our average turnaround time is eight days. In a market where the typical Long Island surveyor quotes four to seven weeks, that difference matters when your contractor is waiting, your closing date is approaching, or your permit application is stalled. We use GPS, drone imaging, and 3D scanning alongside traditional fieldwork, which means more accurate data collected more efficiently — particularly on complex or heavily wooded properties where traditional methods alone fall short.
What Nassau County Property Owners Should Do Before Starting Any Project
The clearest takeaway from all of this: find out which jurisdiction has authority over your property and what that building department requires before you commit to a project timeline. Nassau County’s layered structure means the answer isn’t always obvious, and discovering a survey requirement mid-project is far more disruptive than addressing it upfront.
A current, accurate survey protects you in more ways than one. It confirms setback compliance before you build, not after. It gives your title company and lender the documentation they need at closing. It establishes a clear record of your property lines that holds up if a neighbor dispute ever arises. And in Nassau County’s flood-prone communities, it can directly affect what you pay for flood insurance.
If you’re not sure where to start, reach out to us at Islandwide Land Surveyors. We’re based in Syosset, NY, and we’ve been helping Nassau County homeowners, contractors, attorneys, and developers navigate this process for over 50 years. A free quote takes a few minutes and gives you a clear picture of what your project actually requires.
