Dropped kerbs, driveways and front gardens: the rules
Front garden surfacing is a planning matter and the dropped kerb is a highways matter. Here is how the permeable surfacing condition works and what the highway authority checks.
Paving your front garden and dropping the kerb are two separate permissions from two different parts of the council, and homeowners routinely get one and start work without the other. The surfacing is a planning question governed by Class F of Schedule 2 Part 1 to the General Permitted Development Order 2015, which allows a hard surface in a front garden only where it is made of porous materials or run-off is directed to a permeable area within the curtilage. The crossing itself is a highways question under section 184 of the Highways Act 1980, and the highway authority decides it.
Get the drainage right and the planning side usually disappears. Get it wrong and you have an unauthorised hard surface and a highway authority that will not approve the crossing.
The permeable surfacing rule and its conditions
The condition attached to Class F is about water rather than area. A hard surface between the principal elevation of the house and the highway has to be porous, or run-off from it has to be directed to a permeable or porous area or surface inside your own boundary.
The widely quoted rule of thumb is that impermeable surfacing over about 5 m² needs permission. It comes from government guidance on the permeable surfacing of front gardens published after the 2008 rule change, and it is a reasonable working summary. The safer design answer is to make the surface permeable whatever its size, because that removes the question entirely.
Three ways to satisfy the condition:
- Permeable block paving over an open-graded sub-base that stores and infiltrates water.
- Gravel or a resin-bound permeable surface with a suitable base.
- An impermeable surface falling to a border, soakaway or rain garden within the curtilage, sized to take the run-off.
What does not satisfy it is a fall to the pavement. Directing water onto the highway is the outcome the rule exists to prevent, and it is the most common breach.
Boundary walls, gates and the 1 m highway rule
Front boundary treatment has its own permitted development class. A wall, fence, gate or other means of enclosure next to a highway used by vehicles, or next to the footway of such a highway, is limited to 1 m in height. Elsewhere in the curtilage the limit is 2 m.
Listed buildings and land within their curtilage are outside these rights entirely. So are properties covered by an Article 4 direction removing them, which is common in conservation areas.
Two points people trip on. The height is measured from ground level, and where ground levels differ across the frontage the measurement follows the ground under each part. And replacing an existing higher wall like for like is not automatically permitted: rights to improve or alter an existing means of enclosure do not let you exceed the height limits where the enclosure has been removed.
Council policy on losing front garden greenery
Beyond permitted development, local plans increasingly carry policies on front garden character, surface water and biodiversity. In conservation areas the statutory duty to preserve or enhance character brings the whole frontage into scope, including railings, gate piers and planting.
The practical effect on a householder application is that officers ask for planting to be retained or replaced, for the parking area to be no larger than the vehicle needs, and for boundary treatment to match the street. A frontage converted entirely to a parking apron in a street of hedges attracts an objection even where the drainage is faultless.
Where a street tree or a protected tree stands near the works, that is a separate and more serious issue. Excavation inside a root protection area can amount to destruction of a protected tree, and the offences carry an unlimited fine.
Drainage: soakaways and permeable build-ups
The engineering is straightforward and it is frequently skipped.
Infiltration depends on the ground. Test it before designing. On clay, infiltration may be too slow for a conventional soakaway and the answer becomes an attenuated permeable build-up with a controlled outlet, or a connection to an existing surface water drain with the water company's agreement.
Approved Document H expects soakaways to be located at least 5 m from buildings, which on a small frontage constrains where the storage can go. Permeable paving with a deep open-graded sub-base often solves this by storing water across the whole area rather than in a pit.
Where the plot sits in a critical drainage area, or the works form part of a larger scheme, a Drainage Strategy may be requested. For a single driveway it usually is not, and a short drainage note with the infiltration test result answers most officer queries.
How the highway authority application runs alongside
The vehicle crossing is applied for separately, under section 184 of the Highways Act 1980, to the highway authority, which is the county council or the unitary rather than a district.
| Step | Who decides | What it covers |
|---|---|---|
| Planning permission or permitted development check | Local planning authority | The surfacing, boundary treatment and any access onto a classified road |
| Section 184 vehicle crossing | Highway authority | Lowering the kerb, the footway construction, sightlines, utility apparatus |
| Works | Authority or an approved contractor | The crossing itself, to the authority's specification |
The highway authority will look at visibility, the position relative to street furniture, whether there is room to park clear of the footway, and whether services need diverting. Utility diversions are the usual cost surprise.
Forming a new access onto a classified road is not covered by permitted development rights, so a planning application is required for the access as well as the highways consent. Our guide to dropped kerbs, permission and the highway licence sets out that split in more detail.
Conservation area and Article 4 traps
Article 4 directions are the single most common reason a householder is told they needed permission after the work is done. They remove specified permitted development rights across a defined area, and they are published by the council rather than announced to residents.
Check three things before ordering materials:
- Whether the property lies in a conservation area.
- Whether an Article 4 direction applies and which classes it removes.
- Whether the property is listed, or within the curtilage of a listed building.
All three are searchable on the council's mapping and on the national planning data service. It takes ten minutes.
Where work has already been done and turns out to be unauthorised, the council may investigate. Enforcement is discretionary, and the usual first step is an invitation to submit a retrospective application. Our guide on what happens after an enforcement complaint explains the sequence.
Illustrative example: a 1930s semi where the owner laid 18 m² of impermeable block paving falling towards the pavement, and applied for the crossing afterwards. The highway authority refused until the run-off was resolved, and the fix was a 600 mm permeable margin along the front boundary and a re-laid fall. This example is illustrative.
Order of operations, if you take one thing away: check the constraints, design the drainage, apply for the crossing, then buy the paving.
PlanScope drafts the drainage and planning documents a householder application needs, structured to UK planning policy, with site test results flagged rather than assumed. Enter your postcode on PlanScope to see which reports your project is likely to need, or browse the full report list.
This is general guidance, not legal advice. Check the position with your local planning authority, your highway authority or a qualified professional before relying on it. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.
Frequently asked questions
Do I need permission to pave my front garden?
Not if the surface is porous, or if run-off is directed to a permeable area within your own curtilage. That is the condition attached to Class F of Schedule 2 Part 1 to the General Permitted Development Order 2015. Government guidance following the 2008 change treats impermeable surfacing over about 5 square metres without drainage provision as needing permission.
How high can a front boundary wall be?
One metre where it adjoins a highway used by vehicles or the footway of such a highway, and two metres elsewhere in the curtilage. Height is measured from the ground under each part of the wall. Listed buildings and land in their curtilage fall outside these rights, and Article 4 directions frequently remove them in conservation areas.
Is a dropped kerb the same as planning permission?
No. Lowering the kerb and reconstructing the footway is a highways matter under section 184 of the Highways Act 1980, decided by the highway authority, which is the county council or unitary. Planning permission is a separate question, and it is needed for the access itself where the road is classified.
What drainage does a permeable driveway need?
Test the infiltration rate before designing. On clay, a conventional soakaway may be too slow and the answer is a permeable build-up with a controlled outlet. Approved Document H expects soakaways to sit at least 5 m from buildings, which on a small frontage usually points towards permeable paving with a deep open-graded sub-base.
What happens if I have already paved without permission?
The council may investigate, and enforcement is discretionary. The usual first step is an invitation to submit a retrospective application, and the practical fix is often a permeable margin and a re-laid fall so run-off no longer reaches the highway. The highway authority may withhold the crossing approval until the drainage is resolved.
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.