Usually no — but "usually" is doing a lot of work in that sentence. The answer depends on your locality, your lot type, and whether you're in a historic district. Here's what actually applies across Fairfax, Arlington and Alexandria, and the four situations where a "no permit needed" fence still gets you a violation notice.
Read this first: fence ordinances change, and this guide reflects general practice in Northern Virginia — not legal advice. Always confirm with your locality's zoning office before you dig. We do this on every job, and so should you.
4 ft
Common front-yard height limit
6 ft
Common side & rear limit
3
Approval layers in some HOAs
Northern Virginia is a patchwork of counties and independent cities, each with its own zoning ordinance. Crossing a street can change the answer.
Same general pattern — most residential fences don't require a building permit under the height threshold, but zoning limits and setbacks do apply. Arlington's lots are narrow, which makes two things matter far more than they do in Fairfax: front-yard setback lines, and sight-distance triangles on corner lots.
If your property is on a corner, a fence that's perfectly legal mid-block can be a violation because it blocks the visibility triangle at the intersection. This is the single most common Arlington fence problem we see.
This is the big one. If you're in a designated historic district — which covers much of Old Town and extends into surrounding neighbourhoods — a new fence or a visible change to an existing one generally needs approval from the Board of Architectural Review (BAR), not just a zoning check.
Practically, that means material, height and design get reviewed against the district's character, and the process adds weeks. A fence installed without that approval can be ordered removed. Confirm your district status before ordering materials — it changes both the timeline and the design you can build.
Sterling, Ashburn, Woodbridge and Lake Ridge sit in Loudoun and Prince William counties — not Fairfax. That means a different zoning office, different forms and a different set of height and setback tables. If you're moving between counties or comparing notes with a neighbour, don't assume the Fairfax answer carries over.
This is the distinction that costs homeowners money. A fence can be completely exempt from permits and still be illegal to build. These are the four ways that happens.
| Zone | Typical Limit |
|---|---|
| Front yard | 4 ft |
| Side yard | 6 ft |
| Rear yard | 6 ft |
| Corner lot | Lower |
| Retaining wall topper | Counts |
Typical figures across Northern Virginia jurisdictions. Confirm exact numbers with your locality — they vary by zoning district.
The sight-distance triangle at an intersection overrides standard height limits. A 6-ft fence that's fine mid-block becomes a violation because drivers can't see past it. Arlington's narrow lots make this the most common problem in the county.
Alexandria's BAR reviews fences on material, height and design. "It's under 6 feet so no permit" doesn't help you here — the review is about character, not height, and it can take weeks.
The county may not care. Your HOA will. Architectural review is typically required for anything visible from the street, and in some communities — like parts of Lake Ridge — there are two or three layers of approval stacked on top of each other.
Not a permit issue at all — a boundary dispute. In Arlington especially, tight lot lines mean an extra six inches matters. Get a survey if there is any doubt, or get a written, signed agreement from the neighbour before the posts go in.
Doing these out of order is how projects stall halfway through with materials already paid for.
Not just "Fairfax" — the specific zoning district matters. Look it up on your locality's zoning map, or call the zoning office. This takes ten minutes and determines everything that follows.
This is the step people skip and regret. Historic districts and design overlays add a review layer that can take weeks and change what materials you're allowed to use.
Do this in parallel with the zoning check, not after. HOA review is frequently the longest lead time in the whole project, and they can reject a design the county would happily approve.
Virginia 811 marks underground utilities for free — required before digging, and it takes a few business days. Separately, confirm the actual property line with a survey if there's any ambiguity. These are two different things and both matter.
Only now. Materials ordered, approvals in hand, utilities marked, line confirmed. This is also the point where we can quote accurately — before this, any number is a guess.
Ready to price the actual fence?
Height limits, setback lines, historic review, HOA approval — we confirm what applies to your address as part of the estimate, so the fence you get quoted is a fence you're allowed to build.