Hard surfaces under Class F and porous surfacing

Laying a driveway is permitted development in most cases. Class F of Part 1 of Schedule 2 to the Town and Country Planning (General Permitted Development) (England) Order 2015 allows a hard surface within the curtilage of a house for any purpose incidental to its enjoyment, and allows the replacement of an existing one. The condition that trips people up applies to front gardens: where the surface sits between a wall forming the principal elevation and a highway, and covers more than 5 square metres, it must either be made of porous materials or drain to a permeable area within the plot.

Driveway permitted development is therefore not a question of size on its own. A 60 square metre front drive in gravel or permeable block paving is permitted. A 6 square metre slab of impermeable concrete that sheds water onto the pavement is not, and the council can require its removal.

What Class F covers

The right is for a hard surface incidental to the enjoyment of the dwellinghouse. Parking is the obvious use. So is a patio, a path, a bin store base or a hardstanding for a caravan you keep for your own use.

Class F applies within the curtilage, which is not the same as the title boundary. Where a house sits in a large plot with paddock or orchard beyond, the curtilage may be considerably tighter than the deeds, and a hardstanding laid outside it is not covered. The way officers identify curtilage is set out in our article on curtilage and the principal elevation in Class A cases, and the same approach applies here.

Class F is also disapplied where the house itself was created through certain change-of-use rights in Part 3, so a dwelling formed from an office or an agricultural building under prior approval should be checked against the Order before any surfacing is laid.

Flats have no Class F rights. Part 1 applies to a dwellinghouse, and a communal parking area serving a block is ordinary development needing permission.

The front garden condition

The condition has two parts and both must be true before it bites. The surface must lie on land between a wall forming the principal elevation of the house and a highway, and the area covered, or the area of surface replaced, must exceed 5 square metres.

Where it does apply, there are two ways to satisfy it.

The first is porous surfacing. Gravel, porous asphalt, permeable concrete block paving laid on an open-graded sub-base, reinforced grass and self-binding gravel all qualify when the construction beneath them can actually take water. Permeable blocks bedded on a sealed sub-base do not. The material is only half of it.

The second is directing run-off to a permeable or porous area or surface within the curtilage. A conventional impermeable drive laid to fall towards a planted border, a lawn, a soakaway or a rain garden inside the plot satisfies the condition. Falling towards the highway does not, and neither does a gully connected to a foul sewer.

The practical test a case officer will apply, if a complaint comes in, is simple. Stand at the back of the footway after rain and see where the water goes.

Replacement surfaces and the 5 square metre figure

The threshold catches replacement as well as new work. Relaying an existing impermeable front drive in the same impermeable material is development, and once the replaced area exceeds 5 square metres the condition applies to it.

That surprises people, because the surface was there before. The logic is that the 2008 change to the householder rights was made to slow the loss of permeable front gardens, so a like-for-like replacement is the moment the council gets to require a better outcome.

Small patch repairs below the threshold are outside the condition. Resurfacing half a drive in three phases to stay under 5 square metres each time is not, because the works are read together as one operation.

Conservation areas, article 4 directions and trees

Class F carries no article 2(3) restriction, so a hard surface in a conservation area, a National Landscape or a National Park is generally still permitted development. What changes is the likelihood of an article 4 direction. Councils with historic streets of setts, cobbles or gravel frontages have often removed Class F by direction across those streets, and the direction is the thing to check, not the designation.

Article 4 directions are recorded on the council's own mapping and on the national planning data service. Check both, because coverage of local directions varies.

Trees are the other constraint. A drive laid across the root protection area of a protected tree can breach a Tree Preservation Order even where the surfacing itself is permitted development, and the offence is one of damage rather than of building without permission. Where a tree of any size stands within the working area, a tree survey to BS 5837 and a no-dig construction detail are the usual answer, and both cost far less than replanting a semi-mature tree under an enforcement notice.

Where the drive is part of a larger scheme, or where the plot already drains poorly, a Drainage Strategy sets out the discharge hierarchy and the storage the site needs.

Where a hard surface becomes something else

Class F covers a surface. It does not cover the structures that often come with one.

Raising a hardstanding on fill to level a sloping front garden becomes an engineering operation once the works change ground levels materially, and retaining walls and steps are separate development. A wall or gate to the highway boundary falls under Part 2 Class A, with its own 1 metre height limit next to a highway used by vehicles.

Nor does Class F create a right to cross the footway. The vehicle crossing itself needs the highway authority's consent under section 184 of the Highways Act 1980, and on a classified road the formation of the access needs planning permission in its own right.

Illustrative example, for method only. A 1950s semi has a 24 square metre front garden with a 4 square metre path. The owner lays a full-width drive in impermeable asphalt falling to the kerb. The area exceeds 5 square metres and sits between the principal elevation and the highway, so the condition applies. Neither limb is met, so the works are not permitted development and the council can serve an enforcement notice. Falling the same drive to a 3 metre planted border along the boundary, with a level kerb edge to the footway, would have satisfied it.

Keeping the evidence

Nobody issues a certificate for a compliant driveway automatically, and the burden of showing the works were lawful sits with the owner years later when the house sells.

Keep the delivery notes for the surfacing material, a photograph of the open sub-base before the blocks went down, a dimensioned sketch showing where run-off goes, and the section 184 approval for the crossing. If the position is finely balanced, an application for a Lawful Development Certificate under section 192 of the Town and Country Planning Act 1990 settles it on the evidence rather than on planning merit.

For a scheme that needs an application rather than a certificate, a short Planning Statement dealing with surface water, materials and the street scene is usually all a householder case requires. PlanScope drafts that from your site details and flags the supporting documents the council is likely to ask for.

This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it.

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