Putting up or replacing a garden fence might seem like a straightforward job, but getting it wrong could land UK homeowners with a fine of up to £5,000, according to experts. For many households, a fence is just a basic feature. It marks the boundary, offers privacy, and keeps pets safely inside. But not following the rules can cost far more than just the price of panels and posts.
The biggest mistake? Assuming that you can build or change a fence however you like. But there are specific limits that, if broken, can trigger legal action from the local council. Even small changes could breach the rules, especially if the fence ends up blocking drainage, causing flooding, or going over height limits without permission.
And while the risk might seem low, penalties for homeowners can reach £5,000, while businesses could face fines of up to £20,000.
One lesser-known rule has caught many people out in recent years, according to fencing professionals and home experts at Balustrade Superstore.
Mark Turner, a professional fencer with over 20 years of experience, said: “One of the most common mistakes I see is people adding a trellis or privacy screen on top of a two-metre fence without thinking about the combined height.
“The moment you go over the limit without permission, you risk a complaint and possible action from the council.”
The standard rule is that fences in rear gardens can be up to two metres high without planning permission.
But anything facing a public road or in a front garden must usually stay below one metre unless approval has been granted.
Importantly, if a trellis or screen pushes the total height above the allowed limit, it could trigger enforcement, even if the base fence was fine.
Neighbour disputes are another common issue. Mr Turner warned: “It’s always best to check the property deeds or speak to your neighbour before making changes.
“I’ve seen people build a fence thinking it was on their land, only to find out later it crossed the boundary. That can end up in court.”
And it’s not just about boundaries. If a fence blocks drains or changes the flow of water between properties, councils may step in.
Mr Turner said he had one client whose fence caused flooding by blocking a small drain: “The council got involved, and the homeowner had to pay to alter the fence and cover repair costs for flood damage. It ended up costing them over £1,200.”
To avoid fines and complaints, homeowners are advised to measure carefully, check ownership, ask the council if unsure, and consider how water drains off the property.
A spokesperson for Balustrade Superstore said: “We see many people focus on style or privacy, but the law matters just as much. A well-placed, well-built fence keeps you safe, smart, and on the right side of the rules.”