People buy privacy fences by height: six feet, because that is what everyone has. Then they sit on the patio and still see straight into the neighbor's upstairs window. A fence blocks a line of sight, and whether it works depends on where you sit, where the other person stands and how far apart you are, not just on how tall it is.
The good news is that you can work this out with a tape measure before spending anything. It also tells you whether a taller fence is worth the extra cost, or whether a short run of fence plus a tree would do more.
Key takeaways
- A fence blocks the view between two eye heights; the closer it is to the person you are screening from, the shorter it can be.
- HomeGuide lists wood privacy fences at about $13 to $19 per foot and vinyl privacy fences at about $28.
- Going to 8 feet adds 25% to 35% to the cost (HomeAdvisor), where your town allows it at all.
- Contact 811 before digging post holes; the service is free and state law requires notice.
The tape-measure test
Picture a straight line from your eye, sitting on the patio, to the eye of someone standing in the next yard. The fence has to rise above that line where it crosses it. Two things follow.
If both of you are at ground level, a seated adult's eyes are around 4 feet up and a standing adult's around 5 and a half. Any fence taller than the higher of the two blocks the view, which is why 6 feet works between two flat yards. But if the neighbor's yard is 2 feet higher than yours, their eyes are effectively at 7 and a half feet, and a 6-foot fence on the line will not hide a standing person.
Distance matters too. Placing a screen close to where you sit blocks more of the view with less height, because it covers a wider angle. A 7-foot trellis panel beside the patio can do more than 100 feet of 6-foot fence on the property line. Take a stake and string out to the spot you care about and try it before you order panels.
What privacy costs per foot
HomeGuide's figures put a wood privacy fence at about $13 to $19 per foot, board-on-board, which leaves no gaps as the wood shrinks, at $16 to $22, and a vinyl privacy fence at about $28.[1] HomeAdvisor says an 8-foot fence adds 25% to 35% over standard height.[2] Before paying for that, check your town's maximum fence height; many cap back-yard fences and require a variance or permit to go taller.
Mix fence and planting
Fencing the whole line to block one window is expensive. A standard-height fence plus a few evergreen trees or a pergola in the right place often gives better privacy for less, and the trees keep growing.
Before the posts go in
Confirm the property line with a survey, check HOA rules on height, material and which side faces out, and contact your state's 811 center before anyone digs. The federal Pipeline and Hazardous Materials Safety Administration says every digging project needs the call, 48 to 72 hours ahead under state law, at no cost.[3] Our guide to planning a fence covers the rest of the checklist.
Styles that block the view
Several fence styles give privacy, and they behave differently over time. Solid boards butted together look tidy at first, but wood shrinks as it dries, so gaps can open within a season. Board-on-board overlaps the boards to avoid that. Shadowbox fences alternate boards on each side of the rail, so the fence looks finished from both yards and lets some air through. Horizontal slats suit modern houses, as long as the gaps are small. A lattice band along the top softens a tall fence and lets light through without exposing much.
Remember the wind. A solid fence acts like a sail in a storm, so it needs posts set properly and spaced the way the manufacturer or installer recommends. A style that lets a little air through, such as shadowbox, puts less strain on the posts.
Living screens: trees and hedges
Plants are slower than a fence but keep getting better. Evergreen trees and shrubs block views all year, and a staggered double row looks more natural and fills in faster than a single straight line. Before buying, check the mature width on the label and plant far enough inside your property line that the branches won’t spill over, and that you can still reach both sides to prune.
Your local Extension office can tell you which evergreens grow well in your soil and climate, and which ones to avoid because they are invasive or prone to disease. A screen of mixed species is less likely to be wiped out by a single pest than a row of identical trees.
Privacy works both ways
Your neighbor will see the fence every day too, so tell them before work starts. Share the layout, the height and the style, and offer the finished side if your town doesn’t already require it. Neighbors sometimes agree to share the cost of a section that benefits both yards, and even when they don’t, a fence that arrives without surprises rarely becomes a dispute.
Keeping a wood privacy fence looking good
New pressure-treated wood often needs time to dry before it will take stain, so follow the stain maker’s advice on how long to wait, then seal it on a regular cycle. Keep soil, mulch and firewood piles away from the bottom of the boards, aim sprinklers away from the fence, and cut back vines, which hold moisture against the wood and pull boards loose as they grow.
Gates and getting around
A privacy fence closes the yard in, so think about everything that still needs to get through it. Measure your mower, wheelbarrow and trash bins and make at least one gate wide enough for all of them. If you might ever need machinery in the back yard, for a pool, a shed or a tree removal, a double gate saves taking a fence section apart later. Check whether utility meters end up inside the fence, and if so, how the meter reader will reach them. Solid gates are heavy, so ask for sturdy hinges, a latch that can be opened from both sides and a brace to keep the gate from sagging.
Plug your house size, land price and quotes into the free calculator. It uses the same NAHB 2024 averages as this guide.
Frequently asked questions
How tall should a privacy fence be?
Tall enough to rise above the line between your eyes and the other person’s eyes where the fence crosses it. Six feet works between two flat yards; a higher neighboring yard or an upstairs window may need a taller screen closer to where you sit.
How much does a privacy fence cost per foot?
HomeGuide lists wood privacy fences at about $13 to $19 per foot, board-on-board at $16 to $22 and vinyl privacy fences at about $28.
Is an 8-foot fence much more expensive?
HomeAdvisor says going to 8 feet adds 25% to 35% to the cost, and many towns limit fence height, so check before you plan one.
What is the cheapest way to get privacy in a backyard?
Screen only the views that bother you. A short run of fence, a trellis panel near the patio or a few evergreens in the right place often costs far less than fencing the whole property line.
Does a solid privacy fence need stronger posts?
Solid fences catch more wind than open ones, so posts need to be set and spaced properly for the fence height. Styles that let some air through, such as shadowbox, put less strain on them.
How wide should a privacy fence gate be?
At least wide enough for your mower, wheelbarrow and trash bins. If equipment may ever need to reach the back yard, a double gate is cheaper than removing fence panels later.
Sources
- HomeGuide, "How much does it cost to fence a yard?", September 29, 2025 Verified
- HomeAdvisor, "Fence Installation Cost," updated June 20, 2026 Verified
- Pipeline and Hazardous Materials Safety Administration, "Call Before You Dig!" Verified
Figures last checked October 19, 2026. National averages are a planning guide, not a quote. See our editorial policy and data sources.
