“Which side is my fence?” is one of the most searched boundary questions in the UK. The tricky bit is that the fence itself does not always tell you. A fence can be replaced, moved, repaired, or put up by either neighbour over the years.

This guide explains the usual ways people check fence responsibility in the UK, what “T” marks mean on title plans, and what to do when nothing is obvious. If you do end up replacing a boundary, you can browse fence panels, match them with fence posts, and protect the bottom edge with gravel boards.

First up: ownership vs responsibility

People say “own” the fence, but the key point is usually responsibility for the boundary feature. A title plan might show which boundary you are responsible for maintaining. That does not always mean you “own” the physical fence panel that is there today, especially if it was replaced later.

The common myth: “the posts face the owner”

You will often hear that the owner’s side is the one with the posts and rails showing. In practice, that is not a reliable rule. Fences get built both ways round, and panels can be installed from either side. Some people also choose to face the nicer side to the neighbour. Treat it as a clue at best, not proof.

Step 1: check your title deeds and plan

The most common place to start is your title register and title plan. These may show “T” marks on certain boundaries. A “T” mark is often used to show which property is responsible for that boundary. If the “T” is on your side of the boundary line, it can indicate you are responsible for that boundary feature.

Two quick points that help avoid confusion:

Title plans are usually “general boundaries”. The line shows the boundary position broadly, not to the exact centimetre.
Not every title plan includes “T” marks. Many do not show responsibility at all.

What if there are “H” marks?

Sometimes you may see an “H” mark. This can indicate a shared or joint responsibility for a boundary feature. Again, it depends on how the plan has been drawn and what your documents say. If in doubt, read the wording in your title register and any transfer documents you have.

Step 2: check any paperwork from when you bought the house

When you purchased, you may have been given:

Property Information Forms (often mention boundaries and disputes)
Conveyancing notes or emails
Old transfer documents with boundary clauses

These can be more informative than the plan itself, especially on newer estates where responsibilities were set out clearly in transfers.

Step 3: look for practical clues on the ground

These do not prove anything on their own, but they can support what the paperwork suggests.

Who paid last time: if there is a clear history of one side replacing it.
Position of the fence line: if the fence sits fully inside one garden, that can be a clue, but fences can be moved.
Matching runs: if the same style continues along several gardens, it may have been installed by a developer or as a shared project.

What if it’s unclear?

This is very common. If the plan has no markers and there is no written clause, you may not be able to prove responsibility from paperwork alone. At that point, a practical approach usually works best.

Talk early and keep it calm: most disputes get worse because nobody speaks until something breaks.
Focus on the outcome: “we both want privacy and a safe boundary” is easier than arguing over blame.
Offer options: split costs, each pay for one side, or one neighbour pays but both agree the style.

If your neighbour refuses to fix the fence

If a fence is unsafe and falling, you still have options, even if you cannot prove responsibility quickly. Many people choose to put up their own fence just inside their boundary line to solve the problem without a long argument. If you do this, keep the line clear and avoid attaching to your neighbour’s fence without permission.

If you agree to replace it, get the spec right

Boundary replacements go smoother when you agree the basics before anyone orders materials.

Height and style: choose from fence panels that suit the garden and exposure.
Posts: match the build with suitable fence posts.
Base protection: add gravel boards to protect the bottom edge and keep timber off wet soil.
Fixings: use the right brackets and screws from ironmongery.
Footings: plan for suitable cement products so posts stay solid.

Quick FAQs

Does the “good side” have to face the neighbour?

There is no single UK-wide rule that forces the “good side” to face out. Some areas and developments have covenants or local expectations, but it varies. If you share a boundary, agreeing a style that looks tidy from both sides avoids most headaches.

Can I replace a shared fence without asking?

If it sits on a boundary and affects the neighbour, it is best to discuss it first. Replacing a fence can change height, line, and access, and it is easier when both sides agree what is going up.

What if the fence is on my neighbour’s land?

If the fence is clearly inside their boundary, it may be theirs. But fences move, and boundaries are not always obvious. Check documents first before assuming.

If you do decide to replace a boundary fence, start with fence panels, then match your fence posts and gravel boards so the finished run is solid and lasts.