How many feet of fence does an acre need?

About 835 feet for a square acre. But perimeter does not scale with area — 10 acres square needs roughly 2,640 feet, not 8,350. That is why fencing small parcels is expensive per acre and large blocks are comparatively cheap.

Why are corners so expensive on a wire fence?

Because a braced H-corner assembly is what holds wire tension for twenty years, and it uses several posts, bracing, and considerably more labor than a stretch of line fence. A rectangular field with four corners is far cheaper per foot than an irregular parcel with twelve.

Is barbed wire cheaper than woven wire?

Yes, generally, and it is the lower end of the range. Woven or field wire costs more and contains smaller stock and young animals that go straight through barbed wire. Pick on what you are containing, not on price alone.

Cost Guide

How Much Does It Cost to Fence an Acre in Idaho?

Agricultural fencing runs $4 to $12 per linear foot installed. Here is what that means per acre, why corners cost more than straight runs, and how acreage changes the maths.

Agricultural wire fencing runs $4 to $12 per linear foot installed. A square 1-acre parcel needs about 835 feet of fence, so roughly $3,300 to $10,000. Cost per acre falls sharply as acreage grows — a 40-acre block needs only about six times the fence of a 1-acre block.

Published 2026-08-16 · Updated 2026-08-16

Cost per foot, and what that means per acre

Agricultural wire fencing runs $4 to $12 per linear foot installed — a fraction of any residential fence, because there is far less material per foot and no privacy requirement.

Converting to acreage is where people go wrong, so here is the arithmetic:

Parcel (square)	Perimeter	At $4/ft	At $12/ft
1 acre	~835 ft	$3,340	$10,020
5 acres	~1,867 ft	$7,470	$22,400
10 acres	~2,640 ft	$10,560	$31,680
40 acres	~5,280 ft	$21,120	$63,360

Notice what happens. Ten acres is ten times the area of one acre but needs only about three times the fence. Forty acres is forty times the area and about six times the fence.

If you are fencing a small parcel, the per-acre figure will look brutal. That is geometry, not a quote problem.

Shape matters as much as size

The table above assumes square parcels. Real ground is not square.

A long narrow strip has far more perimeter than a square block of the same acreage. An irregular parcel with a dozen corners costs more than a rectangle with four, because every corner needs a braced assembly — several posts, bracing, and real labor.

If you have flexibility in where the fence runs, straighter lines and fewer corners is the cheapest change available.

What drives your position in the range

Wire type. Barbed is the low end. Woven or field wire costs more and is what you need for smaller stock, young animals, and anything that will push through strands. High-tensile sits between them and holds tension well over long runs.

Post material and spacing. Steel T-posts are cheaper than wood. Idaho Code 35-102 permits posts up to 24 feet apart for a lawful wire fence, but closer spacing means less sag and better resistance to stock pressure. The legal maximum is a ceiling, not a target.

Corners and braces. As above — the real cost driver.

Terrain. Rock is the Jerome County variable. The Snake River Plain is basalt under three to ten feet of loess, and a fence line crossing shallow rock takes a rock auger, a breaker, or driven steel. Draws, water crossings, and slope all add time.

Gates. Size them to the equipment that actually goes through — a stock trailer or a hay truck, not a garden tractor. Undersized gates are the most common thing we get called back to replace on ag properties.

Build to the legal standard

If the fence is holding livestock, it should meet the lawful-fence specification in Idaho Code 35-102: posts no more than 24 feet apart, three stays between posts, at least three barbed or four coiled spring wires of #9 gauge or heavier, bottom wire within 21 inches of the ground, top wire at least 47 inches.

This is not a permitting requirement — nobody inspects it. It matters for liability when animals get out, which in a county crossed by I-84 and US-93 is not academic. Full detail in what counts as a legal fence in Idaho.

A fence on the boundary between two properties is a partition fence, and Idaho gives you a route to split it. Idaho Code 35-103 lets you serve written notice requiring a neighbor to build their half within six months; refuse, and you may build it all and recover half by suit, with a lien attaching to their property.

On long agricultural boundaries that is real money — worth understanding before you pay for the whole run yourself. See who pays for a fence between two neighbors.

Dairy and corral work is priced differently

Corral, alley, and windbreak fencing at a dairy is not field fence and does not price like it. Continuous pipe or cable construction runs $12 to $45 per linear foot because it takes daily pressure from animals and equipment: closer post spacing, deeper footings, heavier material, gates rated for loader contact.

That work is covered on the dairy and livestock fencing page.

Getting a real number

Long agricultural runs vary more than any other fencing, because terrain and shape dominate. We drive or walk the whole line before quoting rather than measuring off a map.

Estimates are free across Jerome and the Magic Valley, priced per foot in writing with corners and gates broken out separately.

The bottom line

If you want this priced for your own property rather than in ranges, we come out and measure at no charge across Jerome and the Magic Valley. You get a written per-foot price with gates and removal broken out separately. Call (208) 732-2816.