A fence looks like a simple project. Dig holes, set posts, hang panels, drink a beer. That’s how homeowners think about it, and that’s why so many of them end up paying twice.
I’ve watched people rip out perfectly good fences because they skipped a form that would’ve taken twenty minutes to fill out. I’ve seen neighbors sue each other over three inches. I’ve seen a guy pay to have his brand-new vinyl fence lifted out of concrete and moved back four feet because he trusted a survey stake he found in the weeds. None of that is bad luck. That’s what happens when you skip the boring part.
Here are the fence permit mistakes that cost real money, in the order I see them most.
1. Building before the permit is approved
This is the big one. Somebody calls the township, gets told “yeah, you need a permit,” fills it out, and then starts digging the next weekend because the weather’s good and they don’t want to wait.
Bad move.
Until that permit is stamped and in your hand — or in your email — you have no protection. If an inspector drives by and sees fresh post holes, you’re getting a stop-work order and probably a fine. Worse, if the plan gets kicked back because your setback is wrong, or you’re in an easement, or your height violates code, you’re not just paying to build the fence. You’re paying to tear it out and build it again.
I had a homeowner in South Philly who couldn’t wait. Started on a Saturday, permit hadn’t even been reviewed yet. Monday morning, inspector shows up because a neighbor called. Turned out he was two feet over the property line. He ate the fine, ate the demo, ate the resurvey, and ate the second fence. All to save a week.
Wait for the paper. Every time.
2. Guessing where your property line is
Nothing on your property is where you think it is. Not the hedge. Not the old chain-link the previous owner put in. Not that rusty iron pin you dug up. Not the sidewalk crack you swear lines up with the deed.
Get a survey. A real one, with a licensed surveyor, with stakes and a written plan. Yes, it costs money — usually somewhere between five hundred and fifteen hundred bucks depending on the lot. That is the cheapest insurance you will ever buy on this project.
Here’s what happens when you guess: the fence goes in, your neighbor gets it surveyed a year later when they sell the house, and now their buyer’s title company is telling you to move your fence or pay for an easement. Either way, you lose. And if you built on top of a utility easement, the utility company doesn’t have to ask nicely before they rip it out to get to whatever’s underneath.
Survey first. Fence second. That order never changes.
3. Ignoring corner-lot visibility rules
If your lot sits on a corner, your township has rules about what’s called a sight triangle — the piece of your yard closest to the intersection where you can’t put anything tall enough to block a driver’s view. Fences, hedges, sheds, all of it.
Homeowners on corner lots forget this constantly. They see a straight run along the sidewalk and assume they can fence the whole thing at six feet. Then the permit gets denied, or worse, it gets approved by a distracted clerk and later an inspector makes them cut it down.
Ask specifically: “What’s the sight triangle requirement for my corner?” Don’t ask a general fence question. Ask that one.
4. Forgetting the pool code entirely
If you have a pool — or you’re planning one — your fence isn’t just a fence. It’s a pool barrier, and pool barrier code is stricter than regular fence code. Height minimums, gap requirements at the bottom, self-closing self-latching gates, latch height off the ground, spacing between pickets. All of it is regulated because kids drown, and the code is written in blood.
I’ve seen people build a beautiful cedar fence, get it inspected, pass — and then a year later put a pool in and get told the fence they already have doesn’t qualify as a barrier. Now they’re either replacing gates, adding a second fence around the pool, or reworking the whole thing.
If a pool is anywhere in your five-year plan, build the fence to pool code from day one. It’s cheaper.
5. Assuming your HOA rules and your township rules are the same
They aren’t. They almost never are. Your township tells you what’s legal. Your HOA tells you what’s allowed in your neighborhood on top of legal. You need both approvals, in writing, before a single post goes in the ground.
Homeowners get burned on this because they get the permit, feel bulletproof, and then the HOA architectural committee sends them a letter saying the fence style doesn’t match the community standard. Now they’re arguing with volunteers who have all the time in the world and a stack of bylaws thicker than a phone book.
Get the HOA sign-off in writing. Same day you file the permit. Don’t wait.
The point
Permits aren’t the government trying to slow you down. They’re the reason you don’t end up in a property dispute, a lawsuit, or a demo bill. Do the paperwork. Get the survey. Ask the specific questions. Then build once.