You've checked the rules. Your extension, loft conversion, or outbuilding meets every permitted development condition. You should be free to build. But then someone mentions an Article 4 direction - and suddenly you're told you need planning permission after all.
An Article 4 direction is a legal order made by a local council (or the Secretary of State) that removes specific permitted development rights in a defined area. It doesn't ban the work - it just means you need to apply for planning permission for something that would normally be automatic. And it's more common than most homeowners realise.
Permitted development is a blanket national system - the same rules apply from Cornwall to Northumberland. But every area is different. Some streets have a particular architectural character that would be harmed by uncontrolled extensions or dormers. Some conservation areas need tighter controls than the standard designated area restrictions provide. Article 4 is how councils tailor the national system to local circumstances.
If an Article 4 direction covers your property, you could do everything right under the standard PD rules and still find that you don't have permission. The consequences of building without knowing are serious - an enforcement notice, the requirement to undo the work at your own cost, or problems when you try to sell.
An Article 4 doesn't ban development. It removes the automatic permission, so you have to apply instead.
Under Article 4(1) of the GPDO 2015, a local planning authority can make a direction stating that the permitted development permission granted by Article 3 does not apply to specific types of development in a defined area. The direction must specify which Part, Class, or paragraph of Schedule 2 it restricts, and exactly where it applies.
The key point: an Article 4 direction is targeted. It doesn't remove all your PD rights. It removes specific ones. A direction might remove your right to build a rear extension (Class A) but leave your right to add a dormer (Class B) intact. Or it might remove the right to add rooflights (Class C) on front-facing roof slopes but allow them on the rear. You need to know exactly which rights have been removed for your property.
The most common use. Conservation areas already have additional restrictions under the standard PD rules - for example, roof extensions and side extensions are not permitted development on designated land. But an Article 4 direction can go further, removing rights that would otherwise still apply in a conservation area - such as replacing windows, painting the exterior, or building a rear extension. Many London boroughs have extensive Article 4 coverage in their conservation areas.
Some councils use Article 4 directions to protect the character of streets or estates that aren't in a conservation area but have a distinctive architectural quality - for example, a 1930s garden suburb or a planned Victorian estate where consistency matters.
A growing number of councils use Article 4 to remove the PD right to convert a family house into a small house in multiple occupation (HMO). This is common in university towns and areas with high rental demand. It affects property investors more than homeowners planning extensions, but it's worth knowing about if you're buying a house with rental potential.
Some councils have used Article 4 to remove the right to convert offices and commercial buildings to housing without planning permission (Class MA). This is typically used to protect employment land in town centres.
Our free eligibility check identifies whether your property is in a designated area. For Article 4 directions specifically, you'll need to check with your council directly - see below.
Your council's website. Most councils publish a list of Article 4 directions with maps showing the areas they cover. Search for "[your council name] Article 4 direction" - for example, "Camden Article 4 direction" or "Leeds Article 4 direction." Some are easy to find; others are buried in planning policy pages.
Your title deeds. An Article 4 direction is registered as a local land charge. If you bought the property recently, your solicitor's local authority search should have flagged it. If you're buying now, ask your solicitor to confirm specifically whether any Article 4 directions apply.
Contact the planning department directly. If you can't find the information online, call or email your council's planning department and ask whether any Article 4 directions apply to your address. Most councils can answer this quickly - it's a factual check, not advice.
The solicitor's search doesn't always catch it
A standard local authority search should reveal an Article 4 direction, but some are missed - especially older directions or those introduced between exchange and completion. If you're buying a property specifically because of its development potential, ask your solicitor to confirm Article 4 status explicitly. Don't assume it would have been flagged.
If your proposed work falls within a right that has been removed by an Article 4 direction, you need to submit a planning application for the work - just as you would if PD rights didn't exist for that type of development. The application is assessed on its merits against local planning policy.
This doesn't mean the work will be refused. Many applications for work that would otherwise have been PD are approved - councils use Article 4 to control development, not to prevent it. The purpose is to allow the council to assess each case individually, which they can't do under the automatic PD system.
An important detail: if the council refuses planning permission for development that would have been permitted but for the Article 4 direction, the council may be liable to pay you compensation for abortive expenditure or loss directly caused by the refusal. This is set out in sections 107 and 108 of the Town and Country Planning Act 1990. In practice, this means councils are generally reluctant to refuse applications outright where the proposed work would clearly have met PD conditions.
If your property is in a conservation area, National Park, AONB, the Broads, or a World Heritage Site, you already have reduced PD rights under the standard rules - side extensions aren't permitted development, roof extensions are restricted, and so on. These are built into the GPDO itself.
An Article 4 direction is additional and separate. You can have a property in a conservation area (standard restrictions apply) that is also covered by an Article 4 direction (further restrictions on top). Or you can have a property outside any designated area that is still covered by an Article 4 direction - the council doesn't need to designate an area as a conservation area to remove PD rights.
Both matter for your project, and they can overlap. If you're in a conservation area, check the standard designated area restrictions first (see our extensions and loft conversion guides for these), then check whether an Article 4 direction applies on top.
Common mistakes that cost money
Assuming PD rights are universal. They're not. Article 4 directions can remove any PD right, anywhere. Always check before starting work - even if your neighbour built the same thing without permission.
Not checking which specific rights have been removed. An Article 4 direction is targeted. It might remove your right to extend but not your right to add a dormer. Read the direction itself, not just a summary of it.
Relying on a builder's assurance that PD applies. Builders are not planning consultants. The responsibility for having the correct permission sits with the homeowner, not the contractor. If in doubt, apply for a Lawful Development Certificate (£274) to get formal confirmation from your council.
PD Assessment Tool
Our free eligibility check identifies whether your property is in a conservation area, National Park, AONB, or other designated area - the most common reason PD rights are restricted. If your property qualifies, the full assessment checks every relevant condition for your project type and produces a formal document you can share with your builder or your council.
Article 4 directions are council-specific and not covered by our automated check - but if our tool identifies any designated area constraints, it will flag them clearly so you know what to investigate further.
Content verified against the Town and Country Planning (General Permitted Development) (England) Order 2015, Article 4(1) and Schedule 3 (legislation.gov.uk), and GOV.UK National Planning Practice Guidance on Article 4 directions. Compensation provisions verified against sections 107-108 of the Town and Country Planning Act 1990 and the Town and Country Planning (Compensation) (England) Regulations 2015. This page is for general information only and does not constitute legal advice.
April 2026