The short answer is not always, but more often than people think. Plenty of people in Knoxville put up a fence without one and never have a problem. Plenty of others learn the hard way that the corner post they set sits two feet onto the neighbor’s land. A survey takes the guessing out of it. Whether it’s worth the cost depends on your lot, your records, and how much you trust the old fence line that’s already there.
Let’s walk through when a survey matters, what it buys you, and the one call you must make before anyone puts a shovel in the ground.
When to Consider a Property Survey
You don’t need a fresh survey for every fence. If you have a recent one on file and your lot lines are clearly marked, you’re probably fine. But there are situations where skipping it is asking for trouble.
Get a survey if:
- You’ve never seen an actual survey of your property, or the last one is decades old.
- Your fence is going near a boundary and even a foot of error would cross the line.
- You live in an older Knoxville neighborhood where lot lines were drawn before modern mapping. Think Fourth and Gill, Old North, or parts of Bearden where the original plats don’t always match what’s on the ground.
- There’s an existing fence and you’re not sure who owns it or whether it sits on the true line.
- Your neighbor has strong opinions about where the property ends.
That last one isn’t a joke. A survey is cheap compared to a boundary dispute, and boundary disputes between neighbors get ugly fast. Once a fence is up and someone challenges it, you could be paying to move it, plus legal fees, plus the cost of never enjoying a backyard cookout in peace again.
If your fence is going in the middle of a big lot, well away from any line, a full survey may be overkill. Use your judgment. The closer you build to a boundary, the more a survey earns its keep.
Why a Property Survey is Beneficial
A survey does more than draw a line on paper. It settles questions that cause real headaches later.
A survey gives you:
- The exact location of your property corners and lines, marked so your fence crew knows where to build.
- A record of easements, which are strips of land where utilities, drainage, or access rights belong to someone else. You usually can’t fence across them without permission.
- Solid footing if a dispute ever lands in front of a judge. A recorded survey is hard evidence. “The old fence was always there” is not.
Easements trip up a lot of people. You might own the land on paper, but if a utility easement runs along your back edge, the power company can dig it up whenever they need to. Build a permanent fence over it and you may be told to tear it out at your own expense. A survey flags those problems before you spend on posts.
There’s also the resale angle. When you sell your Knoxville home, a fence that’s clearly on your own land is a clean asset. A fence that crosses a line is a problem you hand to the buyer, and it can slow or sink a deal during closing.
One thing worth being honest about: surveys cost money, often a few hundred to over a thousand dollars in the Knoxville area depending on lot size and how much research the surveyor must do. That can hurt. But set it against the cost of tearing down and rebuilding a fence, or settling a legal fight, and it starts to look like a bargain.
Call Before You Dig
This part isn’t optional, and it’s free. Before anyone digs a single post hole, you must have underground utilities marked.
In Tennessee, that means contacting Tennessee 811. State law requires it. You call 811 or file the request online, and the utility companies send someone out to mark where their gas, electric, water, and communication lines run under your yard. It’s a legal requirement, not a suggestion, and skipping it is genuinely dangerous.
The process is simple:
- Contact Tennessee 811 at least three full working days before you plan to dig.
- Crews come out and mark the underground lines with paint and flags, each color standing for a different utility.
- You dig carefully around those marks.
Hit a gas line with a post hole digger and you’ve got an emergency, maybe an explosion, and a bill you never want to see. Cut a buried fiber line and you’ve knocked out internet for the whole block and you’re paying to fix it. This is one of those rules that exist because people learned it the painful way.
A good fence company handles the 811 calls as part of the job. At AV Fence, we do. But you should know it’s happening, and never let any crew, ours or anyone else’s, start digging before those marks are down. If a contractor waves it off, that tells you plenty about how they run the rest of the work.
Talk to AV Fence Knoxville
A survey isn’t always required, but knowing your exact lines and clearing the underground before you dig protects your money, your neighbors, and your peace of mind. If you’re planning a fence in Knoxville and you’re not sure whether you need a survey, we’re happy to talk it through and give you a straight answer.
Call, text, or write AV Fence Knoxville. We’ll help you figure out what your project needs, get the utilities marked, and build a fence that sits exactly where it should.