Fence contractors build where the property boundaries are marked. If those boundaries are incorrect or have not been verified, a fence can end up on a neighboring property, inside a public right of way, or within a recorded easement. A land survey identifies the legal property line before construction begins, helping property owners avoid boundary disputes, utility conflicts, and costly fence relocation.

Fence projects near alleys, utility easements, or drainage ditches carry added risk because visible features on the ground rarely match the legal property boundary. Land surveying compares existing property records with field measurements to determine where the fence can be placed before any posts are installed.

Why do alleys cause fence problems?

An alley looks like a boundary. It usually isn’t one.

Some alleys are public rights of way, dedicated on a recorded plat. Some are private, owned by the adjoining lots with shared use rights. And some are just worn paths that neighbors have driven for decades without any legal standing at all. Each type sits differently against your property line.

The gravel or pavement edge tells you nothing. A public alley right of way is often wider than the drivable surface, so the legal edge can sit well inside what looks like your yard. Build a fence to the gravel and you may have built inside the right of way.

That creates practical trouble fast. Trash trucks need clearance. Delivery vehicles swing wide. A fence crowding the travel path gets clipped by a bumper within a year or two, and if it sits in a public right of way, the city can require its removal at your expense.

Hand the surveyor any plat or deed that shows the alley. Those records, compared against what the crew finds on the ground, define where the line actually falls.

What happens when a fence sits inside an easement?

Utility and access easements love the back and side of lots, which is exactly where fences go.

A fence inside an easement isn’t automatically forbidden. Many utility easements tolerate one. But the easement holder keeps the right to access their equipment, and access usually beats your fence. When a crew needs to reach a buried line, they can pull the panels out. Some agreements say plainly that they don’t have to put them back.

So the survey shows you where the easement runs. What you’re allowed to build inside it comes from the easement document itself, not from the surveyor. Read it, or have your attorney read it.

Practical fixes when a fence has to cross an easement:

• Install removable panels over the easement corridor
• Add an access gate wide enough for a service vehicle
• Shift the fence line outside the easement, even if you lose a few feet of yard
• Ask the utility what they’ll accept, in writing, before you build

Get the easement documents to the surveyor before fieldwork. A one-line mention in a deed rarely contains enough information to plot the location accurately.

Why are drainage ditches risky for fence construction?

A ditch running along the back of a lot invites a bad assumption: that the ditch is the line. It might be. It might sit inside a drainage easement, cross the middle of your parcel, or belong entirely to the neighbor.

Even when the ditch does track the boundary, building near it brings its own headaches. Posts set in soft, wet soil work loose. Frost heave lifts them. And a solid privacy fence spanning a drainage path acts like a dam, catching leaves and branches until water backs up onto somebody’s property.

That last one turns into a legal problem quickly. Blocking or redirecting stormwater onto a neighbor is the kind of thing that produces a lawsuit rather than a phone call.

So map the ditch, the top of bank, and the surveyed line before choosing a fence style. When the fence could genuinely affect how water moves, bring in an engineer. A surveyor measures the ground. Deciding what the water will do afterward is a different profession.

What does a fence contractor actually need in the field?

A survey drawing helps the designer. The person swinging a post-hole digger needs something else entirely: marks on the ground.

Field layout, sometimes called fence staking, puts physical points along the surveyed line. The contractor builds from those stakes instead of eyeballing the drawing.

Offsets matter here. A stake sitting directly on the boundary corner gets destroyed the moment excavation starts, so surveyors often set the stake a fixed distance away, maybe two feet inside the line, and label it. That mark is not the corner. It points at the corner. Contractors who miss this detail build a fence two feet off, which is a mistake that costs more to fix than the survey cost in the first place.

Before anybody digs, walk the site with the contractor and confirm what every mark means. Ask which stakes are on the line, which are offset, how far, and in which direction.

Why utility locating is a separate job

Property corners and buried utilities have nothing to do with each other. A land survey finds the boundary. It does not find the gas line.

Call your local one-call service before digging. In most places that’s a free service, and in most states, skipping it is against the law. A fence crew hitting a buried electric line or a gas main creates a genuinely dangerous situation, and the liability lands on whoever failed to make the call.

So the sequence runs: survey the boundary, get the utilities located, then dig. Doing it in that order takes an extra week. Doing it out of order can take a lot more than that.

Frequently Asked Questions

Can I build a fence right up to the alley?

Not always, and often not where you think. Public alleys usually carry a right of way wider than the drivable surface, so the legal edge may sit inside your yard. A survey compared against the recorded plat shows where you can actually build.

Is a fence allowed inside a utility easement?

Sometimes, but the easement holder keeps the right to access their equipment, and reaching it may mean removing your fence. Many agreements put the cost of that removal on the owner. Read the easement document and ask the utility what they’ll permit before you build.

Does a drainage ditch mark my property line?

Not reliably. The ditch may run inside a drainage easement, cut across the middle of your lot, or sit entirely on the neighbor’s side. Only the survey answers that question.

Will the surveyor mark my fence corners?

That depends on the scope you order. Ask specifically for field staking or layout points if your contractor needs marks to build from, since a boundary survey doesn’t automatically include them.

What’s the difference between a survey stake and a property corner?

A corner is the actual boundary point. A stake may sit right on it, or may be set at an offset to keep it from being destroyed during construction. Always ask which one you’re looking at before anyone starts digging.

Do I still need utility locating if I have a survey?

Yes, and they’re completely separate. The survey finds the boundary. Utility locating finds what’s buried underneath. Call your one-call service before any post hole gets dug.