Fences cause more neighbor disputes than almost any other home project, and most of those disputes start with two questions: where exactly is the property line, and how tall is the fence allowed to be right there? Neither answer is the same everywhere. A fence that's perfectly fine in your back yard can be a problem along the front, on a corner, or around a pool.
This guide covers what to decide, what to measure and what to ask before you set the first post. It's general guidance. Your town's zoning rules and your permit office decide.
Why fences are mostly a zoning question
For most fences, the building code has less to say than the zoning ordinance does. Zoning is about where things go on a lot and how they affect neighbors and the street. That's why fence rules usually talk about height by location (front yard versus back yard), clear sight lines at corners and driveways, which side of the fence faces out, and how far the fence must sit from a lot line or a public sidewalk.
The building code comes in when a fence gets tall enough to be treated as a structure, or when it's part of a pool barrier. Pool barriers are a separate, stricter topic. More on that below.
When a permit usually comes up
Towns vary a great deal here. Some require a permit or zoning approval for any new fence. Others only for fences above a certain height. Some exempt replacing an existing fence of the same height in the same spot. The questions that usually decide it:
- Height, and whether it changes along the run.
- Location on the lot: front yard, side yard, rear yard.
- Corner lots and driveways, where sight-line rules often limit height near the street.
- Pools, where the fence may count as a safety barrier with its own requirements.
- Retaining walls, where a fence on top of a wall can change how height is measured.
- Easements, where a utility may have the right to remove a fence for access.
What to decide first
- The layout. Sketch your lot, the house, and where the fence runs. Mark gates.
- Height for each section. It's common to plan a taller fence in back and a lower one, or none, toward the street.
- Material and style. Solid privacy fence, open picket, chain link, ornamental metal. Some rules treat solid and open fences differently.
- Which side faces out. Many towns and most neighbors expect the finished side to face out. Ask.
- Who installs. DIY or a fence company. If a company is installing, confirm who is pulling the permit.
What to measure
- Your property line. This is the big one. Don't guess from where the neighbor mows. Look for survey pins, check your closing documents for a survey or plot plan, or hire a surveyor if the line matters and isn't clear.
- The distance you plan to hold the fence back from the line. Many people hold a fence slightly inside their own line to avoid any argument.
- The length of each run and the number of gates, for the materials list.
- Ground slope along each run. On a slope, you'll either step the panels or rack them, and height rules may be measured from a specific point.
- Distance to sidewalks, driveways and street corners.
As with any digging, call 811 to have utilities marked before you set posts.
Questions to ask your permit office
- Do I need a permit or zoning approval for this fence?
- What heights are allowed in the front, side and rear yards in my zoning district?
- I'm on a corner lot. Is there a sight-triangle limit near the street?
- How is height measured on a slope or on top of a retaining wall?
- Does the finished side have to face out?
- Is there a required setback from the property line or sidewalk?
- My fence is part of a pool barrier. What do you require for height, gaps and gates?
- What should the application include: a plot plan, a photo of the style, a product sheet?
About pools
If the fence encloses a pool, hot tub or spa, treat it as a safety barrier first and a fence second. Barrier rules commonly cover overall height, gaps under and between pickets, climbable horizontal rails, and self-closing, self-latching gates. Those details are where pool fences most often fail inspection. Your office, and the code your town has adopted, will tell you exactly what's required. See our pool guide for more.
HOAs and historic districts
A homeowners association can be stricter than the town, and its approval is separate from the permit. The same goes for historic districts, which may review style and material. Get those approvals in writing before you order materials.
Common reasons fence applications get sent back
- No plot plan, or a plot plan without distances from the property line.
- A height that's over the limit for that part of the lot.
- A corner-lot fence that blocks the sight triangle.
- A pool barrier missing gate or gap details.
- A fence placed in an easement without permission.
Do it yourself or hire a pro?
Fences are one of the friendlier DIY projects, especially on flat ground. Set posts plumb, at a consistent depth, and in the right place, and the rest follows. Slopes, rocky soil, long runs, tall privacy fences in windy spots and pool barriers are where a fence contractor earns the fee. Whoever builds it, the property line is your responsibility, so settle it first.
How Sully helps with a fence
Sully asks where the fence runs, how tall each section is, and whether it's part of a pool barrier or on a corner lot. Then Sully reads your town's zoning and permit pages first, and labels each rule with its source. If your town doesn't publish its fence height rules online, the report says so plainly and tells you who to call. The materials list counts posts, rails, panels or pickets, gate hardware and concrete, with a waste allowance and any missing run lengths called out. The filing packet puts your plot sketch, the rules and the office's checklist in one PDF.
Related reading: Fence height and setbacks, explained and Site plans and sketches the office accepts.