The question comes up on almost every gate survey: how far back from the road does the gate need to be? There is no single number in national law. What there is, across councils and highways authorities, is a consistent reason and a common range. A car arriving at a closed gate should be able to stop completely off the road and pavement while the gate opens. In practice that usually means a set-back of 5 to 6 metres.
Why Set-Back Matters
A car waiting on the carriageway for a gate to open blocks traffic, and one waiting across the pavement blocks pedestrians and pushchairs. On a busy road, a driver who has to stop and wait while turning in is also at risk of being hit from behind. Highways officers comment on gate positions for exactly these reasons, and where a gate needs planning permission, the council will ask them for a view.
The set-back is about the car, not the gate. A gate set far enough back gives a stacking space in front of it, so the car leaves the road first and then waits. The space has to be long enough for the vehicle you actually use. Owners on the BuildHub forum point out that anyone with a trailer, a horsebox or a motorhome needs more than the usual figure.
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What a Kent Council Says
Gravesham Borough Council's front driveway design guidance, published in 2023, is one of the clearest local statements. It warns that gates set back too little can result in a vehicle obstructing the highway, and says that for a car they would need to be set back a minimum of six metres. It also says gates must not open outwards, and asks for some transparency, such as railings, so a pedestrian on the footway can see a vehicle coming out.
That guidance applies in Gravesend and the Gravesham villages, but the same thinking runs through other councils' advice. Highways guidance elsewhere in England commonly asks for 5 or 5.5 metres as a minimum, and up to 6 metres where a longer vehicle or a pedestrian gap needs to fit.
Gates Must Not Open Outwards
Section 153 of the Highways Act 1980 says a gate that opens onto a street must not open outwards. The highway authority can serve notice requiring it to be changed, and if the owner does not act within eight days, it can do the work and recover the cost. So a roadside swing gate must open into the property, which adds the length of the gate leaf to the space you need behind it.
A sliding gate avoids the swing, but it does not remove the set-back. The car still needs somewhere to wait while the gate slides open. What sliding saves is the extra depth an inward swing needs behind the gate, which is why sliding gates suit shorter drives.
Working Out Your Own Distance
Start with the length of your car, add a small margin, and measure from the back of the pavement, or the edge of the road where there is no pavement. A typical family car is around 4.5 to 5 metres long, which is why 5 to 6 metres keeps coming up. Then add what sits behind the gate: for inward swing gates, the length of each leaf must fit between the gate and anything parked on the drive.
On a corner plot or a curved road, think about where the car actually stops, not just the straight-line distance. If the drive slopes up from the road, a car waiting on the slope needs the same space, and a swing gate opening uphill has its own problems with the ground. Accurate measurements of the opening and the drive at the survey save trouble later.
Visibility When You Pull Out
Set-back is half the story; the other half is seeing and being seen when you leave. Highways guidance uses visibility splays: clear triangles either side of the drive where nothing tall blocks the view along the road and the pavement. Tall solid gates and piers right at the back of the footway can hide a pedestrian from a driver coming out, which is why Gravesham asks for railings or some transparency.
In practice, keep piers and walls low near the pavement, use open-bar or railing-style gates where the drive meets a busy footway, and keep hedges either side trimmed. A gate set well back helps visibility too, because the driver is already clear of the gate before reaching the pavement.
When a Shorter Set-Back Has Been Accepted
The rule is not absolute. In a 2021 appeal at Condover in Shropshire, the council had refused automated sliding gates because a car could not pull off the road before they opened. The planning inspector allowed the appeal, reasoning that the gates could be opened from about 100 metres away, that a single house generates few movements, and that any wait would be minimal.
That argument can work on a quiet road. It is far weaker on a classified road, a bus route or a busy junction, where highways officers expect a proper set-back. Remote opening also depends on the driver remembering to press the button in time, so it is a supporting point, not a substitute for space.
New Accesses and Dropped Kerbs
If the gate comes with a new or widened access, the set-back is assessed with it. A new access onto an A, B or C road needs planning permission, and Kent County Council will only process a dropped kerb on a classified road once that is in place. In Medway, the council handles both. Gravesham's guidance notes that a new dropped-kerb parking layout should not include gates at all, so check local guidance before designing both together.
Shared Drives and Private Roads
On a shared drive or private road, the same logic applies to the point where the drive meets the public road, and neighbours with a right of way must not be held up waiting at a gate. Positioning matters here as much as on a public road, and the rules on gates across a shared driveway add a legal layer on top of the highways one.
What This Means for Your Gate
If your drive allows it, set the gate at least 5 to 6 metres back from the road, open it inwards or make it slide, and keep the frontage open enough to see pedestrians. If your drive is too short, a sliding gate, a gate placed further up the drive, or remote opening well before arrival may help, but on a busy road the honest answer may be that a gate is not workable. A good installer will measure this at the survey and tell you, and an electric sliding gate is often the solution on tight Kent frontages.
A Kent Refusal Over Set-Back
Kent councils apply the same thinking. In 2014 Tonbridge and Malling Borough Council refused new gates and an access on Wateringbury Road, East Malling. Among the reasons, the gates were set only 2.5 metres back with the access within 5 metres of a junction, which the planning committee described as a significant highway safety hazard. The committee also found the gates and wide hard standing looked suburban on a rural lane. Both points are worth remembering if your entrance is near a junction or in open countryside.