Do you need planning permission for a driveway?

The short answer

Under national permitted-development rules you can lay a new hard surface in your front garden without planning permission if either the surface itself is permeable, or the water running off it is directed to a soakaway, border or lawn inside your own boundary.

You need planning permission if you lay more than five square metres of hard, impermeable surface that drains onto the road. That is the whole test. It is not about the size of the driveway, the material, or whether you are replacing something that was already there — it is about whether rainwater ends up in the public drain.

The rule exists because London floods. Thousands of individual front gardens paved over in solid concrete, each shedding its water into the same Victorian sewer, is a genuine cause of surface-water flooding, and this is the lever planning policy uses to slow it down.

What "permeable" actually means

This is where most of the confusion sits. A surface is only permeable if the whole construction is — not just the visible top layer. Permeable block paving laid on a compacted, non-porous sub-base over clay is not a permeable driveway. The water passes through the joints, reaches the sub-base, and has nowhere to go.

A genuinely permeable build uses an open-graded aggregate sub-base with the void space to hold water while it soaks away, laid over a permeable membrane rather than an impermeable one. It costs a little more than a standard build and it is the part nobody sees, which is precisely why it gets skipped.

Gravel

The simplest permeable option and the cheapest. Needs edge restraints to stop it migrating, and a stabilising grid if the drive slopes or you dislike raking it.

Permeable block paving

Purpose-made blocks with wider joints filled with angular grit. Durable under turning wheels, and individual blocks lift for access to services beneath.

Porous resin-bound gravel

A smooth seamless finish that still drains, provided it is laid over a porous base. Resin-bonded — a different product — is not permeable; check which you are being quoted.

Any surface plus a soakaway

You can lay solid stone, block or concrete and stay within permitted development by draining it to a properly sized soakaway on your own land.

Where the water is allowed to go

If you are draining to a soakaway rather than using a permeable surface, it has to be built to actually work. That means sized for the area of paving feeding it, dug into ground that will accept water, and sited clear of the house — a general rule of thumb is at least five metres from any building, and away from drains, boundaries and tree roots.

On London Clay this needs checking rather than assuming. Clay drains slowly, and a soakaway dug into it without testing can simply fill and stay full. On the Thames terrace gravels — much of Richmond, Kingston, Hounslow and the riverside boroughs — soakaways work considerably better.

Draining to a border or lawn is a legitimate and much cheaper answer on a smaller frontage, provided the ground can take it and the fall genuinely carries water that way.

The dropped kerb is a completely separate matter

This catches people out constantly. Planning permission and a vehicle crossover are two different things from two different departments, and having one does not give you the other.

The kerb and the footway are public highway. Lowering them requires an application to the council's highways team, who will assess sightlines, street trees, lamp posts, drain covers and whether the road is suitable. If approved, the work is carried out to their specification and at your cost. It is entirely possible to be told your driveway needs no planning permission and then be refused the crossover that would let you drive onto it.

Apply for the crossover first, or at least in parallel. Building a driveway you cannot legally drive across is an expensive way to learn this.

Conservation areas, listed buildings and flats

Permitted development rights are narrower in some situations and absent in others. In a conservation area the front garden is part of what is being protected, and removing a wall, railing, hedge or established planting to create parking is often resisted even where the surface itself would be fine. Some areas have an Article 4 direction that removes permitted development rights entirely.

If the property is listed, work affecting it or its curtilage — including boundary walls and gates — can need listed building consent, which is separate from planning permission and is a criminal matter to skip.

Permitted development rights apply to houses, not to flats or maisonettes. If you own a flat, you need permission for this regardless of the surface, and almost certainly your freeholder's consent as well.

What happens if you get it wrong

The council can require you to remove or alter an unauthorised hard surface. In practice enforcement usually arrives via a neighbour complaint or a flooding investigation rather than a patrol, but it does arrive, and the cost of taking up a driveway and relaying it correctly is far more than building it properly first time.

The more common cost is quieter. A driveway built on an inadequate sub-base ruts and sinks within a few years whatever the planning position, and one that sheds water at the house rather than away from it causes damp. Both are avoidable at the excavation stage and neither is fixable afterwards without starting again.