Fence Layout: String Lines, Lasers, and Not Building on the Neighbor's Property
The most expensive fence mistake in the trade isn't a bad post — it's a good fence on the wrong property. Here's our layout process, from property line to string line, including the conversation every contractor should have before the auger starts.
Step 1: The property line is the customer's job — in writing. Contractors locate fences; surveyors locate boundaries. Our contract says the customer is responsible for identifying their property lines, and we say it out loud too. What we do provide: real help finding the evidence — pin hunting with a metal detector at the corners (survey pins are usually rebar at or below grade), the county GIS parcel map (a guide, not gospel — GIS lines can be off by feet), and the plat of survey from their closing documents. When pins can't be found, or the line is disputed, or the fence is going right on the line in a tight subdivision: recommend a survey, in writing. A few hundred dollars of surveyor beats a torn-out fence and a court date, every time. And as a practical rule, we set fences a few inches inside the agreed line unless the customer insists otherwise in writing — it eliminates a whole category of neighbor drama for the cost of nothing.
Step 2: Know the local rules before the design is final. Setbacks from sidewalks and corners (vision triangles), height limits by yard (front vs back), HOA approval, pool-code requirements, and "good side out" ordinances vary by municipality. Around here we check each village's code per job — five minutes that prevents the worst phone call in fencing: the inspector's.
Step 3: From quote map to ground. Our quotes are drawn on parcel-line imagery, so layout day starts with a plan that already matches the property — the crew is confirming a drawing, not creating one. Translate it to the dirt: mark the two end points first, pull the main string line, then locate corners and gates off the string. Check the long runs by eye down the string — the eye catches a bow that the tape forgives.
Step 4: String and stakes, done properly. String sits at consistent height on solid stakes outside the work line (so digging doesn't kill your reference), with post centers marked in paint at exact spacing. Panel-system spacing is unforgiving: vinyl panels don't stretch, so an inch of accumulated spacing error across ten posts becomes a panel that doesn't fit. Measure every center from the start point, not post-to-post — that's how accumulation error dies.
Step 5: Grade decisions, decided before digging. Racked (following the slope) versus stepped (level panels, stair-stepping) is an aesthetic and structural call — vinyl panel systems have a racking limit, and beyond it you're stepping whether anyone likes it or not. Walk the slope with the homeowner, show photos of both, and get the choice initialed. "I didn't know it would look like stairs" is a preventable conversation.
Step 6: The pre-dig checklist: utility locate marks present and current, string matches the quote footage (a big mismatch means re-measure now), gates confirmed in position and swing, sprinkler heads and invisible-dog-fence lines asked about (locates don't mark private lines — ask, every time).
Layout is an hour that decides the whole job. Fast crews aren't fast because they dig quickly; they're fast because they never dig twice.
Get the line right before the auger comes out
- Satellite fence estimating — parcel lines loaded on the map
- Fence permits and utility locates — the call before you dig
- Quoting a fence from satellite — measuring from the same parcel data
Frequently asked questions
Who is responsible for locating property lines for a fence?
The homeowner — contractors locate fences, surveyors locate boundaries, and the contract should say so explicitly. Good contractors still help find evidence: pin hunting with a metal detector, county GIS parcel maps (a guide, not gospel), and the plat of survey from closing documents.
When should a homeowner get a survey before building a fence?
When corner pins can't be found, when the line is disputed or unclear, or when the fence is going directly on the line in a tight subdivision. A few hundred dollars of surveyor beats a torn-out fence and a court date.
Why measure fence post centers from the start point instead of post-to-post?
Accumulated error. Vinyl panels don't stretch, so an inch of spacing drift across ten posts becomes a panel that doesn't fit. Measuring every center from the run's start point kills accumulation error.
Is there a fence layout form worth using on site?
A fence layout form is worth keeping only if it captures the four things that change the price after you leave: total run with corners and ends counted separately, gate positions and widths, grade changes that will need stepping, and anything on the line — trees, AC pads, a neighbour's shed. A form that only records footage is the reason two identical-looking jobs come back with different margins. We ship the same four fields as the quote screen, so the layout and the estimate cannot disagree.