Security fencing and gates around a commercial yard

A fence or gate at a commercial yard is permitted development up to 2 metres high, or 1 metre where it sits adjacent to a highway used by vehicular traffic or the footway of such a highway. Those two figures, in Class A of Part 2 of Schedule 2 to the General Permitted Development Order 2015, decide most schemes. A 2.4 metre palisade line along a yard boundary that fronts an estate road needs planning permission, and a yard operator who puts it up first and asks afterwards is the most common enforcement case environmental and planning teams see on industrial estates.

The right applies to land generally rather than just to dwellinghouses, so a yard can use it. It has hard edges.

Height limits for means of enclosure at commercial premises

Class A permits the erection, construction, maintenance, improvement or alteration of a gate, fence, wall or other means of enclosure. The limits are these.

Height is measured above ground level at the point in question, which matters on a sloping yard. A fence on top of a retaining wall is measured from the lower ground level on the outside face in most authorities' practice, so confirm the method with the council before fabricating panels.

Maintaining or improving an existing enclosure is permitted provided the height is not increased beyond those limits. Replacing a 2.4 metre fence that has stood for years with another 2.4 metre fence is not maintenance of something within the limits, and the honest answer is that its lawfulness depends on whether the original has become immune from enforcement.

Where an existing boundary wall in a conservation area is to be taken down, demolition can need permission in its own right, so check that before ordering a skip.

Fencing adjacent to a highway used by vehicular traffic

The 1 metre limit is the one operators find hardest to accept, and it is also the one most often misread.

The test is whether the enclosure is adjacent to a highway used by vehicular traffic. An unadopted private estate road may still be a highway if the public has access, and a fence set a few metres back from the carriageway can still be adjacent for these purposes. Where the answer matters commercially, get it confirmed rather than assumed.

The route to a higher fence on a road frontage is a planning application. Those applications succeed on three arguments: an operational security need evidenced by the nature of the business and its stock, a design that reduces visual bulk, and a landscape response in front of the line. A 2.4 metre welded mesh fence behind a 1.5 metre hedge is a very different proposition from the same fence standing bare on a pavement edge.

Some local plans carry designing out crime policies that support security measures explicitly. Quote them.

Gate sets, visibility splays and the access

Gates attract a separate set of issues from the fence they sit in.

Gates must not open outwards over the highway, because that is an obstruction. Set the gate line back far enough that a vehicle waiting for it to open stands clear of the carriageway, and for a yard taking articulated vehicles that set-back needs to reflect the length of the longest vehicle using the site.

Where a new or widened vehicular access is proposed, Part 2 Class B permits the formation or alteration of an access to a highway in connection with permitted development, and it does not extend to a trunk road or a classified road. An access onto a classified road therefore needs planning permission, and separately a licence under section 184 of the Highways Act 1980 for the crossing itself. Larger works in the highway are delivered under a section 278 agreement with the highway authority.

Visibility splays are assessed from the proposed gate position, not from the back of the footway, and the splay must sit on land you control or on highway land. Where a yard will generate heavy goods movements, a short Transport Statement setting out vehicle numbers, swept paths and the access geometry is usually expected.

Palisade, mesh and acoustic fence appearance

Specification changes the planning answer more than operators expect.

Steel palisade reads as industrial, is often resisted on frontages and in sensitive locations, and galvanised palisade reads brighter still. Welded mesh of the close-mesh type is more transparent, harder to climb, and generally easier to consent. Weldmesh panels in dark grey or dark green recede noticeably against a hedge or a treeline.

Toppings are usually the sticking point. Razor wire and barbed wire on a public frontage are frequently refused or conditioned out, while rotating anti-climb toppings and mesh of a profile that defeats a foothold achieve the same aim with less visual aggression.

Acoustic fencing is a different product with a different purpose. A solid timber or composite barrier used to attenuate yard noise has real visual bulk, and the acoustic case has to be made properly rather than asserted. Where plant, refrigeration or vehicle movements are the source, a Noise Impact Assessment using the BS 4142 method tells you the barrier height and length that actually works, and the same analysis applies to refrigeration plant noise at cold stores.

Conservation areas and prominent frontages

Within the curtilage of a listed building, Class A does not apply at all and both planning permission and, in many cases, listed building consent are needed.

In a conservation area the height limits are unchanged, and the design scrutiny is far closer. Where a yard sits behind a historic frontage, the usual answer is to keep the secure line back from the street, use the existing building as the boundary where possible, and reserve the visible section for a wall or railing in a traditional form.

Prominent frontages outside designated areas can be just as sensitive in practice. A gateway at the entrance to an industrial estate, visible from a main road and from housing, will be assessed on how it reads in that view, so submit a photograph from the road with the proposed line drawn on.

Lighting and surveillance attached to the fence

Security lighting mounted on a fence line is a frequent source of complaints and conditions. Column-mounted floodlights aimed outwards across a boundary cause light trespass into neighbouring windows and gardens, and an objection from an environmental health officer is harder to answer after installation than before.

Design the scheme to point inwards and downwards, specify the luminaire with cut-off optics, state the mounting height and the aiming angle, and give a lux plot at the boundary. A Lighting Assessment against the Institution of Lighting Professionals guidance on obtrusive light is the document authorities expect, and councils usually expect a suitably qualified author for it.

Closed circuit television cameras have their own limited permitted development right in Part 2, with dimension and siting restrictions, and the right does not apply to listed buildings. Check the current text before fixing cameras to a street-facing elevation.

Drawings and conditions

Validation failures on fencing applications are almost always drawing failures.

• A site plan showing the full proposed line, with the type of enclosure annotated on each run.
• An elevation of each fence type at 1:50 or 1:20, with the height dimensioned and the topping shown.
• A section through any fence standing on a wall, bank or retaining structure, with ground levels on both faces.
• The gate set drawn in plan, with the set-back, the opening direction and the swept path of the largest vehicle.
• A finishes note giving the material, the coating system and the colour reference.
• Where lighting is included, a layout with luminaire positions, mounting heights and the lux plot.

Expect conditions on materials and colour, on retention of any landscaping in front of the fence, on the removal of barbed topping where the council resists it, and on lighting to be installed in accordance with approved details and not altered afterwards.

This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it, and read the current text of Part 2 before relying on a height limit.

Enter the yard's postcode on PlanScope to see which supporting documents a boundary and access scheme is likely to need. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.