A new fence, wall or gate can normally be permitted development up to 1m high next to a highway used by vehicles, including its footway, or up to 2m elsewhere. These are not unconditional rights: listed-building connections, Article 4 directions and planning conditions can alter the position. [1]
Which height limit applies?
Start with the boundary's relationship to the highway. A wall can be beside the pavement serving a road even though it does not stand immediately beside the carriageway. Do not assume that calling it a “side fence” necessarily gives it the higher allowance. [1]
Check the complete proposed arrangement, not just a fence panel's catalogue height. Provide elevations showing the wall, gates, posts and any additional screening when seeking a planning assessment. This gives the council the design that will actually be built rather than an incomplete component description. [1]
Maintaining, improving or replacing an existing enclosure can follow a different permitted-development test where the existing height already exceeds the ordinary limit. Planning Portal describes the restriction on increasing that height. This does not establish that an unauthorised existing enclosure is lawful; investigate its history before relying on replacement rights. [1] [2]
Listed buildings and conservation areas
The ordinary permission has exclusions involving listed buildings, including certain walls or enclosures forming a boundary with a neighbouring listed property. Check both sides of the boundary, not just whether your own house appears on the list. [1]
Listed building consent is separately required for demolition, alterations or extensions that affect a listed building's special character. Assess the status of historic walls and associated structures before removing them. A new fence's dimensions do not answer the question about demolition of what already stands there. [3]
Conservation-area proposals also need to consider the contribution made by existing boundaries. The 17 August 2026 NPPF uses policy HE9 for conservation areas, including retaining features that positively contribute to their character. This is relevant to assessing a proposal, not an automatic permission or a substitute for the legal consent checks. [4] [5]
Planning height is not structural safety
Freestanding garden walls and fences do not normally require building-regulations approval, but they must still be safely designed and maintained. The absence of an application is not evidence that a wall can safely carry an extra height or altered gate arrangement. [6]
Before increasing an existing wall, have its condition and suitability considered. A planning-compliant height is only one part of the decision; do not use it as a specification for foundations, piers or structural support. [6]
Boundaries and the Party Wall Act
A wall astride the boundary can be a party fence wall under the Party Wall Act; a wooden fence is not treated in the same way. Work on a shared masonry wall or building a new boundary wall can therefore require a separate party-wall assessment. [7]
Agree the intended location and establish ownership before instructing the builder. Planning permission and the Party Wall Act address different questions, so do not expect either process alone to resolve an uncertain legal boundary. [2] [7]