Every fence quote starts with one number — linear feet — and it’s a number you can nail down yourself with a tape measure or even your phone before any contractor visits. Here’s the process, plus the mistakes that make people over- or under-buy.
Step 1: Find your property lines first
Before measuring anything, confirm where your land actually ends. Check your plat map (in your closing documents, or your county assessor’s website), look for existing survey pins at corners (a metal detector finds buried ones), or hire a surveyor ($400–$800) if lines are disputed. Building even a foot onto a neighbor’s property is the most expensive fencing mistake there is.
Step 2: Measure the run
Walk each side you’re fencing with a 100-ft tape or a measuring-wheel app, and sketch the yard as a simple shape with a length on each side. For a typical rectangular backyard fenced on three sides (the house forms the fourth), the math is: two side lengths + back length = linear feet.
Quick reference for common lots:
- Quarter-acre lot, backyard only: 150 – 180 linear ft
- Standard suburban backyard: 120 – 160 linear ft
- Full perimeter of a quarter acre: ~420 linear ft
- Full perimeter of a half acre: ~590 linear ft
Step 3: Subtract gates, then add them back as line items
Mark where gates go (at minimum: one person gate near the house; add a 10–12 ft drive gate if mowers or vehicles need through). Subtract gate widths from your fence footage — gates are priced separately and cost more per foot than fence.
Step 4: Count the extras that quotes hide
Corners and ends need heavier terminal posts. Slopes add material — a steep run consumes ~5–10% more fencing when stepped. Obstacles (trees, boulders, old footings on the line) each add labor. Note all of these on your sketch; itemized quotes beat surprises.
Step 5: Price it
With your linear footage in hand, our calculators price every option in seconds: wood, vinyl, chain link, or compare all materials at once. If privacy is the goal, the privacy fence comparison shows all four materials side by side with a 20-year best-value pick.