Do I Need Planning Permission for a Fence or Wall?

The planning rules for garden fences, walls and gates - height limits, highway restrictions, and when you need planning permission.

Fences, walls, and gates are among the most common causes of planning disputes between neighbours. The good news is that most garden boundaries can be built or replaced under permitted development rights - but the height limits are strict, and getting them wrong can lead to enforcement action.

Permitted Development Rules

You can erect, maintain, or improve a fence, wall, or gate without planning permission provided:

Maximum height of 2 metres - measured from the ground level on the highest side
Maximum height of 1 metre if the fence or wall is adjacent to a highway used by vehicles (this includes roads, but also shared driveways and access ways in some cases)
The fence, wall, or gate does not form part of the curtilage of a listed building

These limits apply to new fences and walls, and to increasing the height of existing ones. Replacing an existing fence like-for-like (same height, same position) does not normally require planning permission even if the existing fence was already above the PD limits - provided you are genuinely replacing, not altering.

The 1-Metre Highway Rule

The most common mistake is building a 2-metre fence along a road boundary. If your property fronts a highway (any road, lane, or path used by vehicles), the maximum permitted height is 1 metre along that boundary. This is a road safety measure - tall fences and walls near junctions obstruct visibility for drivers and pedestrians.

This rule applies to:

Front garden boundaries along roads
Side garden boundaries where the property is on a corner and the side faces a road
Any boundary adjacent to a vehicular highway, including shared private roads in some interpretations

If you want a taller boundary along a highway, you will need to apply for planning permission. The council will consider visibility and road safety.

How Is Height Measured?

Fence and wall height is measured from the natural ground level on the higher side. This matters on sloping sites - if the ground is 300mm higher on your side, and you build a 2-metre fence measured from your side, it will be 2.3 metres on your neighbour's side and therefore exceed the 2-metre limit as measured from their ground level.

Trellis on top of a fence counts towards the total height. A 1.8-metre fence with a 300mm trellis on top is 2.1 metres - technically over the PD limit. In practice, many councils take a pragmatic approach to small trellis additions, but strictly speaking, it requires planning permission.

When Do You Need Planning Permission?

You need planning permission if:

The fence or wall exceeds 2 metres in height (or 1 metre adjacent to a highway)
Your property is a listed building - you may also need listed building consent
An Article 4 Direction has removed fencing PD rights in your area
A condition on your original planning permission restricts boundary treatment (common on new-build estates)

Conservation Areas

The standard fence and wall PD rules apply in conservation areas - there are no additional height restrictions specifically for conservation areas under national PD rules. However, councils may use Article 4 Directions in conservation areas to control boundary treatments that affect the character of the area. High close-boarded fences replacing low stone walls, for example, might be targeted.

Boundary Ownership

Planning permission relates to the land use, not ownership. You need to build the fence on your own land (or with the agreement of the neighbouring owner if on a shared boundary). If you are unsure where the boundary lies, check your title deeds or the Land Registry plan. Planning permission does not resolve boundary disputes - that is a civil matter between the parties.

Retaining Walls

Retaining walls (walls that hold back earth on a higher level) are treated differently. A retaining wall that creates a raised platform may be subject to the 300mm raised platform rule - if the ground behind the wall is significantly higher, the wall-plus-earth combination could be treated as a raised platform requiring planning permission. Seek advice from your council if you are building a significant retaining wall.

Tips

Measure carefully - check height from the ground level on the higher side
Check highway boundaries - the 1-metre limit applies to any vehicular highway, not just main roads
Talk to your neighbours - even if you have PD rights, communication prevents disputes
Consider the Party Wall Act - if you are building on or astride the boundary line, the Party Wall Act may apply
Check your deeds - some properties have restrictive covenants limiting fence height or materials