Do I Need a Survey Before Building a Fence in Tennessee?

Usually not by law, but often in practice. Most of East Tennessee has no rule requiring a survey before a residential fence, and Knoxville lets a fence sit right on the lot line with no setback. If the fence runs within a few feet of the line and you cannot find your corner pins, hire a licensed land surveyor.

Loudon County Fence is a veteran-owned fence contractor that has built fences across East Tennessee since 1973. We set posts off survey pins and stakes every week, and this guide explains when a survey is worth paying for, what a Tennessee boundary survey actually includes, and what to do if you skip it.

Is a survey legally required to build a fence in Tennessee?

For a typical residential fence, no. The requirement that matters is where the fence goes, not whether you hired a surveyor first.

Inside Knoxville city limits, the zoning code puts no setback on fences at all. Section 10.3.L.1.c of the City of Knoxville Zoning Code, Article 10 reads: "Fences may be constructed at the boundaries of a lot without setback with the exception of the required visibility triangle." That freedom cuts both ways. If you are allowed to build on the line, you need to know exactly where the line is.

In unincorporated Knox County, the main front-yard rule is about visibility. Section 3.20.04.B of the Knox County Zoning Ordinance says: "In any required front yard, except as provided in "A." above, no fence, wall, hedge or yard ornament shall be permitted which materially impedes vision across such yard above the height of three and one-half (3½) feet." In Farragut, fences up to 7 feet are exempt from building permits. None of these rules asks you to submit a survey for a standard backyard fence.

Where a survey can become mandatory is your HOA. Many East Tennessee subdivisions ask for a plot plan with the fence drawn on it before they approve the project, and some boards want it drawn on a survey. Read your covenants before you schedule anything.

When should you get a survey before building a fence?

Get one when a mistake would be expensive or would start a dispute. Here is the order we walk customers through:

1. The fence will run on or within about 2 feet of the property line. Concrete footings are wider than the post, so a fence that looks "just inside" can still have concrete under the neighbor's yard.
2. You cannot find the corner pins. If you can locate the pins at both ends of a run, we can pull a string line between them. If one is missing, the line is a guess.
3. The neighbor disagrees, or has said anything about the line. A survey is cheaper than a lawsuit and far cheaper than moving a finished fence.
4. The lot is wooded, sloped, irregular, or larger than a typical subdivision lot. Long runs through trees and over hills are where lines drift by several feet.
5. An old fence, hedge or tree line is the only "evidence" of the boundary. Old fences in East Tennessee were often built where it was convenient, not where the deed says.
6. An easement crosses the yard. A surveyor can stake the easement lines at the same visit. See our guide to fences and easements in Knoxville.

If none of those apply, for example a fence well inside your yard around a pool or a dog run, you can usually skip the survey.

Is the survey from my closing good enough?

Often it is not, because many closing documents are not boundary surveys and did not set any pins. Tennessee law says so directly. Tenn. Code Ann. § 62-18-126 states that "all limited nonmonumentation procedures or practices, such as mortgage loan inspections, mortgage loan certificates, mortgage title inspections and improvement loan certificates, shall be authorized as closing or loan surveys." In plain terms, the drawing in your closing packet may have been made for the lender without anyone marking the corners on the ground.

Here is how the common documents compare:

If your packet includes a true boundary survey with pins "found" or "set" noted at each corner, and the pins are still there, that is usually all you need.

What does a Tennessee boundary survey include?

A boundary survey locates or sets monuments at your corners, draws them on a plat, and has to meet state accuracy and research rules. These standards come from the Tennessee Board of Examiners for Land Surveyors.

Physical pins. Under Tenn. Comp. R. & Regs. 0820-03-.07(1)(h), "Metal monuments shall be no less than one-half (1/2) inch in diameter; concrete monuments shall be no less than four (4) inches on each side or in diameter and shall contain ferrous or magnetic material; and both shall be no less than eighteen (18) inches in length unless some impregnable material is encountered." The same rule requires new metal or concrete monuments to carry "an identifying mark or cap with the Land Surveyor's registration number or company name permanently fixed upon it." That cap is how you tell a real survey pin from a random piece of rebar.

Accuracy standards. Rule 0820-03-.05 sets how closely the measurements must close:

A tenth of a foot is about 1.2 inches. That is the level of certainty you are buying, and it is why a surveyed line ends arguments that a tape measure from the house never will.

Research on your neighbors' deeds. Tenn. Code Ann. § 62-18-127 requires the surveyor to "search the land records of the land to be surveyed filed in the register of deeds office and obtain the deeds of record of all the adjoining landowners as it pertains to the common boundaries."

Notice when something is off. Under § 62-18-124(d), if the surveyor finds a major discrepancy between deeds, or "evidence of use or possession not consistent with deed descriptions," the surveyor "shall notify the affected adjoiners." If an old fence is sitting on the wrong side of the line, expect your neighbor to hear about it.

Can my fence company or my neighbor mark the property line?

No. Only a licensed land surveyor can establish a boundary in Tennessee. Tenn. Code Ann. § 62-18-101(b) states: "It is unlawful for any person to practice or offer to practice land surveying in the state ... unless the person has been duly registered or exempted under this part." Under § 62-18-120(b), a violation is a Class C misdemeanor, and "Each day of violation constitutes a separate offense."

So when a fence salesperson tells you "the line is about here," that is an opinion, not a boundary. Our crews build off pins and stakes that you or your surveyor show us. We will pull a string between two found pins, but we will not guess at a missing corner.

Your neighbor's survey can help if it is recent and the pins on your shared line are marked. It covers only the lines it shows, though, and the person who paid for it is the surveyor's client, not you.

One more useful fact: a surveyor can cross the neighbor's yard to do the job. Section 62-18-124(a) lets a professional land surveyor and crew "go on, over and upon the lands of others when necessary to perform surveys for the location of property corners, boundary lines, rights-of-way and easements."

How do I find my property pins before calling anyone?

Start with paper, then go to the yard. Many homeowners find their pins in an afternoon.

1. Pull your closing documents. Look for a plat or survey that notes "iron pin found" or "iron pin set" at each corner, with distances between them.
2. Get the recorded plat. Subdivision plats are filed with the county Register of Deeds and list the plat book and page on your deed.
3. Measure from a known point. Use the plat distances from a street corner or a neighbor's pin to narrow the search area to a few feet.
4. Use a metal detector or magnetic locator. By rule, pins are metal, or concrete with magnetic material, so a locator picks them up. In East Tennessee clay they are often under 2 to 6 inches of sod and fill after a few years of mowing and grading.
5. Look for the cap. A plastic or aluminum cap stamped with a registration number or company name is a survey monument. A bare bent bar near a driveway may not be.
6. Do not move or reset anything. If a pin is loose, leaning, or sitting in a construction pile, treat it as disturbed and call a surveyor.

Be careful with "natural" markers. The state rule itself lists "trees, rock piles or fence corners" as large or indefinite monuments that cannot be measured to the required accuracy. An old fence corner is a clue, not proof.

What happens if my fence ends up on the neighbor's land?

The neighbor can ask you to move it, and time alone rarely fixes the problem. Tennessee's adverse possession rules are narrower than most people think. The 7-year period under Tenn. Code Ann. § 28-2-101 applies only with recorded color of title. Without it, the period is 20 years. We explain the details in What Is the 7-Year Fence Law in Tennessee?

In practice, a fence a foot over the line usually surfaces at the worst time: when one of you sells and the buyer's surveyor flags it. Moving a finished fence means paying for removal, new holes, new concrete and often new material. That bill is nearly always larger than the survey would have been.

Shared boundary fences are their own topic. Under Tenn. Code Ann. § 44-8-202, a neighbor who attaches to and uses your fence can owe part of its cost. See Who Pays for a Fence Between Neighbors in Tennessee?

How far inside the property line should the fence go?

Even with a perfect survey, we usually recommend keeping the fence slightly inside the line rather than straddling it. Knoxville allows a fence at the boundary, but building a few inches to a foot inside gives you three things:

• All of the concrete stays on your land, not just the post.
• You can maintain, stain or replace the fence without stepping onto the neighbor's property.
• The fence is clearly yours, which avoids "whose fence is it" arguments later.

On a corner lot, also check the visibility triangle at the intersection and your local front-yard height rule before setting the layout. Our guide to how close a fence can go to the property line in Tennessee covers setbacks by situation.

Does a survey change the cost or schedule of a fence?

A survey adds a one-time cost and some lead time, but it does not change the price of the fence itself. Installed prices in our area run roughly:

For what drives a quote up or down, see how much a fence costs. Plan the survey first, then the fence layout, then the utility locate. Tennessee 811 needs 3 working days' notice before digging, so request your locate once the line is staked. Details are in Do You Have to Call 811 Before Digging Fence Posts in TN?

Key facts

• In most of East Tennessee, no rule requires a homeowner to order a survey before building a residential fence, though some HOAs ask for one.
• Knoxville Zoning Code Section 10.3.L.1.c lets fences be built at the lot boundary without setback, except in the required visibility triangle.
• Closing documents such as mortgage loan inspections are "nonmonumentation" closing surveys under Tenn. Code Ann. § 62-18-126 and do not set corner pins.
• Tennessee survey pins must be at least 1/2 inch in diameter and 18 inches long, and new pins must carry a cap or mark with the surveyor's registration number or company name.
• Only a registered land surveyor can legally establish a property line in Tennessee; practicing without registration is a Class C misdemeanor.
• The 7-year adverse possession rule needs recorded color of title; otherwise the period is 20 years.

This article reflects Tennessee law and local codes as published in October 2026. It is not legal advice. Confirm local rules with your codes office and boundary questions with a licensed surveyor or attorney.

Ready to plan a fence on the right line?

We will walk the property with you, look at your plat and pins, tell you honestly whether a survey is worth it for your layout, and give you a written price. Call Loudon County Fence at (865) 988-9935 or request a free on-site estimate. More answers to common questions are on our fence answers page.