An Article 4 direction withdraws a named permitted development right across a defined area, so the works that would have gone through prior approval now need a full planning application. It is made by the council under article 4 of the General Permitted Development Order 2015, it is site-specific, and nothing about it appears in national permitted development guidance.
This guide covers what an Article 4 direction can and cannot remove, the exemption that protects a prior approval you already hold, how long a direction takes to come into force, and the compensation rule that explains why councils give twelve months’ notice.
What an Article 4 direction actually does
The NPPF glossary puts it plainly: a direction under article 4 of the GPDO 2015 “which withdraws permitted development rights granted by that Order”. Three things follow from that sentence, and each one costs somebody money when it is missed.
- It removes a right, it does not ban the development. You can still do the works. You need planning permission for them, judged against the development plan like anything else.
- It only bites on rights the GPDO granted. If an activity was never development in the first place, an Article 4 direction has nothing to withdraw.
- It is drawn by class and by boundary. A direction covering Class MA on one side of a high street says nothing about the other side, or about any other class.
What an Article 4 direction cannot do: the Class E misconception
You will see it written that an Article 4 direction can stop a shop becoming a restaurant, or an office becoming a gym. It cannot, and the reason matters.
Since September 2020, shops, offices, restaurants, gyms, clinics and nurseries have sat together in use Class E. Section 55(2)(f) of the Town and Country Planning Act 1990 says that moving between purposes within the same use class is not development. No development means no planning permission required, and no permitted development right involved either — the GPDO never granted one, because none was needed.
An Article 4 direction withdraws rights the GPDO granted. It cannot convert something that is not development into something that is. So a Class E unit can move between Class E uses inside an Article 4 area, and the direction is irrelevant to it. What the direction can reach is the move out of Class E — most often to residential.
What Article 4 directions are commonly used for
| Right withdrawn | What it stops | Typical location |
|---|---|---|
| Part 3 Class MA | Class E commercial floorspace converting to dwellings by prior approval | Town centres, primary shopping frontages |
| Part 3 Class L | A single dwelling becoming a small HMO for up to six people | University districts, areas with HMO concentration |
| Part 3 Class G | Adding up to two flats above a Class E unit as a mixed use | High streets under regeneration |
| Part 1 Classes A to H | Householder extensions, dormers, cladding, windows, satellite dishes | Conservation areas |
| Part 11 Class B | Demolition of a building | Areas protecting local facilities such as pubs |
A small number of classes cannot be withdrawn by an Article 4 direction at all — article 4(1) carves out Part 4 Class DA, Part 7 Class CA and Part 17 Classes K, KA and M. Everything else in Schedule 2 is fair game.
The exemption that saves a prior approval you already hold
This is the provision worth knowing before you walk away from a site. Article 4(2)(a) says a direction does not affect development permitted subject to prior approval where the prior approval date falls before the direction comes into force, and the development is completed within three years of that date.
The prior approval date is whichever of these happened:
- prior approval was given;
- the council determined that prior approval was not required; or
- the determination period expired without the council notifying you either way.
So a Class MA prior approval secured before the direction takes effect survives it, provided you finish inside three years. A direction that is out for consultation is a deadline, not a closed door. Getting an application in before the coming-into-force date is frequently the difference between a prior approval and a full application with affordable housing and contributions attached.
How long a direction takes to come into force
The procedure is set out in Schedule 3 to the GPDO, and there are two routes.
The normal route
The council makes the direction, then advertises it locally, displays site notices for at least six weeks and serves notice on owners and occupiers. The notice must allow at least 21 days for representations and must state a coming-into-force date that is at least 28 days, and no more than two years, after the representation period opens. The direction does not take effect at all unless the council then confirms it, and it cannot confirm until at least 28 days after the last notice was served or published.
Two years is a long runway. Directions aimed at Class MA are routinely made with a coming-into-force date twelve months out — see the compensation rule below — which gives you a defined window to act in.
The immediate-effect route
A council can make a direction that bites straight away where it relates only to Parts 1 to 4 or Part 11 Classes B and C and it considers the development would be prejudicial to proper planning or a threat to local amenity, or where the direction covers a conservation area and certain householder classes. These come into force on the date the notice is served.
They are not permanent by default. An immediate-effect direction expires six months after coming into force unless the council confirms it inside that period. A direction made and then forgotten about lapses.
Why twelve months keeps appearing: the compensation rule
Withdrawing a permitted development right can trigger a compensation claim under section 108 of the Town and Country Planning Act 1990 if the council then refuses permission for the development it used to permit. Two timing rules govern it:
- The council avoids liability if notice of the withdrawal was published not less than twelve months before the direction took effect.
- You lose the claim unless the planning application that was refused was made within twelve months of the direction taking effect.
That is why so many directions carry a twelve-month lead time, and why an immediate-effect direction is an expensive tool a council uses sparingly. It also means that if you are inside twelve months of a direction taking effect, a refused application may be worth more to you than it looks.
The policy test a council has to meet
Under the National Planning Policy Framework published on 17 August 2026, policy DM10 says the use of Article 4 directions should:
- be limited to situations where it is necessary to protect local amenity or the wellbeing of the area — the examples given are safeguarding against the demolition of local facilities, preventing an over-concentration of uses such as small HMOs, and supporting the vitality and viability of parts of town centres;
- be based on robust evidence; and
- apply to the smallest area required to mitigate the evidenced harm.
Note what has gone. The December 2024 framework carried a separate, tougher test for directions aimed at Class E to residential conversion — they had to be limited to avoiding “wholly unacceptable adverse impacts”. The 2026 framework drops that wording and applies the single DM10 test to every class. If you are working from an article that quotes “wholly unacceptable adverse impacts” or an NPPF paragraph number, it predates August 2026.
Both limbs remain arguable at the consultation stage. “Robust evidence” and “smallest area required” are the grounds on which draft directions get narrowed, and representations are the cheapest planning work you will ever do.
Why developers get caught out
Article 4 directions are invisible from the outside. There is no national register, the boundary is whatever the council drew, and nothing on a listing, a title or a standard search flags one. The usual failure sequence is: read the national PD rules, assume prior approval applies, agree a price on that basis, then discover the direction after exchange.
Conservation areas make it worse, because they attract householder directions and the two restrictions stack. A conservation area already removes side extensions, two-storey rear extensions, cladding and dormers by default; an Article 4 direction on top can take out windows, doors, roof materials and front boundary walls as well.
How to check for Article 4 before you commit
BOOM! carries an Article 4 Direction layer in Data Studio and an Article 4 constraint in SiteSeeker, so you can exclude designated land from a search area rather than checking sites one at a time.
Then do three things the data cannot do for you:
- Read the direction itself, not the map. The boundary tells you where; only the direction tells you which class was withdrawn. A direction covering Class L has no bearing on a Class MA conversion.
- Check for directions in consultation. A made-but-unconfirmed direction will not be on anyone’s constraint layer yet, and it is exactly the situation where article 4(2)(a) is worth money.
- Check the confirmation date. An unconfirmed immediate-effect direction more than six months old has expired.
Do those three and an Article 4 direction stops being a surprise and becomes a timetable. That is usually the difference between a site you lose and a site you buy at the right price.
