Walkthrough: a dropped kerb refused on highway grounds
This illustrative walkthrough follows a front garden parking proposal from a highway refusal through to a revised scheme, and separates the planning permission from the highway authority's own crossing consent.
A dropped kerb refusal on highway grounds almost never turns on whether you deserve somewhere to park. It turns on a sight line, a gradient or a tree, and it is decided by a highways engineer who never sees the planning file. The walkthrough below is illustrative, assembled from the pattern these cases follow rather than from one real address, and it follows a front garden parking proposal through a refused crossing to a revised scheme that was built.
The lesson arrives early: the crossing enquiry should come before the drawings, not after.
The property and the request
A 1950s semi on an unclassified residential road. Low brick wall to the front, a privet hedge inside it, a frontage about 7 m wide and a garden depth of roughly 5.5 m from the back of the footway to the bay window. No garage, no existing access. Parking on the street had tightened considerably since the nearby station car park started charging, and the owners wanted one off-street space.
Straightforward enough. Lay a permeable driveway, remove a section of wall and hedge, get a crossing constructed, done by the summer.
Two features complicated it. A mature street tree, a lime, stood in the footway almost centrally to the frontage. And the road narrowed about 12 m to the north where it met a junction with a priority bend.
The two consents in play
Worth restating, because the owners had assumed one application covered everything.
The driveway and the hard surfacing fell within Part 1 Class F of the General Permitted Development Order 2015, subject to the porous surfacing condition. Removing the front wall was within the Part 2 Class A allowance given its height. The access itself, onto an unclassified road and in connection with permitted development, was capable of falling within Part 2 Class B, so no planning permission was required for the access as such.
The crossing over the footway was a different matter entirely. That needed consent under section 184 of the Highways Act 1980 from the county council as highway authority, and the highway authority had no interest in the Part 1 and Part 2 analysis at all. Their question was whether a vehicle could safely enter and leave the frontage across a public footway.
Visibility, the verge and the street tree
The engineer's site visit produced three findings.
The lime tree's root protection area, calculated on BS 5837:2012 principles from the stem diameter, extended across most of the central frontage. A crossing there would mean excavating within it and placing a loaded construction over the roots, which the authority's own arboricultural officer objected to on stability and health grounds. The authority was not prepared to fell a healthy street tree for a private access.
Visibility to the north was constrained by the bend, and the available sight line fell short of the standard the authority applied for the road's character and speed. The existing wall and hedge were part of that problem, but the bend was the larger part, and no amount of boundary removal fixes geometry.
Gradient was the small mercy. The frontage fell gently away from the carriageway, within what a transition over 5 m could absorb.
Why the authority objected
The refusal letter gave two reasons. The proposed crossing would require construction within the root protection area of a protected highway tree, and the available visibility at the proposed access point fell below the authority's standard for the road, having regard to the proximity of the junction and bend to the north.
Both reasons were about position rather than principle. That distinction is the one worth noticing, because a refusal on principle is hard to overcome and a refusal on position is often solvable. Nobody had said a crossing on this frontage was unacceptable. They had said a crossing at that point was.
The owners' first instinct was to appeal. There is no appeal to the Planning Inspectorate against a section 184 decision, because it is not a planning decision. The available routes were an internal review, a complaint to the ombudsman about process rather than engineering, or a revised proposal.
Options that avoided a crossover
Before redesigning, three alternatives were tested, which is the step most people skip.
A shared access with the adjoining semi, using the neighbour's existing crossing with a right of way and a reconfigured boundary. Simple in highway terms and rejected by the neighbour, which is the usual outcome.
A rear access from the service lane behind the gardens. The lane was unmade, in third-party ownership, and the question of rights was unresolvable without a title investigation that cost more than the driveway.
A controlled parking zone permit scheme on the street, pursued through the council's traffic team. Slow, uncertain, and not within the owners' control, but worth asking about because it occasionally removes the need for the works altogether.
None of those worked here. They often do, and half an hour spent on them costs less than a second refusal.
The second application
The revised proposal moved the crossing to the southern end of the frontage, clear of the tree's root protection area, and reduced the crossing width to the authority's standard domestic dimension rather than the wider opening originally drawn.
Three supporting pieces were prepared. A Tree Survey to BS 5837:2012 recording the lime's stem diameter, crown spread and root protection area, with a plan showing the revised crossing wholly outside it and a no-dig construction specification for the short overlap at the margin. A short Transport Statement setting out the measured visibility at the new position in both directions, the swept path for a family car entering and leaving in forward gear, and the turning area within the plot. And a brief Planning Statement dealing with the surfacing, the drainage arrangement and the boundary treatment, submitted alongside because the hedge removal and the revised wall were being confirmed in the same correspondence.
Visibility at the southern position was adequate because the bend was further away and the sight line ran along a straight section. That was the whole of it. The same frontage, 4 m to the south.
Scale matters to how much evidence is proportionate. A domestic crossing needs a page of visibility measurements, where a larger proposal needs the kind of modelling that transport evidence carried a school expansion through. Submitting the larger version of the evidence for a driveway wastes money and irritates the engineer.
What the consent required
The crossing was approved with conditions typical of these decisions. Construction by the authority's approved contractor, to the authority's standard detail, at the applicant's cost, including relocation of a gully that sat within the revised opening. No-dig construction within the margin of the root protection area, supervised by an arboriculturist, with hand digging only and no machine excavation. The frontage to be surfaced in permeable material draining within the curtilage, with no discharge to the highway. The retained wall to be reduced on either side of the opening to maintain the sight line, and the hedge to be kept below 600 mm within the splay.
The hedge condition is the one owners forget. A visibility splay is only as good as the planting inside it, and letting a privet grow back to 1.2 m after two summers quietly recreates the original objection.
Total elapsed time from the first refusal to the constructed crossing was about five months, most of it waiting for the works to be programmed rather than for decisions.
If you are at the start of this rather than the middle, make the highway enquiry first, then look at what a frontage scheme usually needs before commissioning anything.
This is general guidance, not legal advice; check the position with your local planning authority or a qualified professional before relying on it. Councils usually expect a suitably qualified author for arboricultural and transport work, and professional review is strongly advised. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.
Frequently asked questions
Can a highway authority refuse a crossing because of a street tree?
Yes, and it commonly does. Street trees sit in highway land and the authority owns them. Constructing a crossing within the root protection area risks the tree's stability and health, and most authorities will not remove a healthy street tree to create a private access. Repositioning the crossing clear of the roots is the usual answer.
Is there a right of appeal against a refused crossing?
Not to the Planning Inspectorate, because a section 184 decision is not a planning decision. Authorities normally offer an internal review, and the ombudsman can consider maladministration rather than the engineering merits. In practice the productive route is a revised position or width that answers the objection.
Does planning permission for hardstanding guarantee a crossing?
No. The two consents are independent and are decided by different teams against different tests. A planning permission for a driveway on an unclassified road says nothing about whether the footway can be crossed at that point, which is why the highway enquiry should come first rather than last.
What counts as an adequate visibility splay for a domestic access?
It depends on the speed and character of the road, and the authority sets the figure from its own standards drawn on Manual for Streets principles. The splay is measured from a point set back behind the footway in both directions, and anything above about 600 mm within it, including a wall, hedge or parked car, is treated as an obstruction.
Can I park on my front garden without a dropped kerb?
You can lay hard surfacing, but driving across the footway without a constructed crossing is an offence and damages the footway, for which the authority can recover costs. Hardstanding without a crossing is useful only where an existing access already serves the frontage or where the parking is reached from a shared drive.
Does the driveway surface have to be permeable?
Where the hard surface sits between the principal elevation and the highway, Part 1 Class F of the General Permitted Development Order 2015 requires it to be porous or to drain to a permeable area within the curtilage. Impermeable paving draining to the street falls outside the permitted development right and needs an application.
Sources and further reading
This article is general guidance about the planning system in England and, where stated, the rest of the UK. It is not legal or professional advice. Check your local planning authority’s validation requirements and take professional advice for your specific site.