An Article 4 Direction is a legal order that removes Permitted Development rights at a specific address. In London, they are used far more than anywhere else in England — stripping the right to extend, convert, or alter properties without planning permission. This guide explains what they are, how to find out if you're affected, and what it means for your project.
Most homeowners discover Article 4 Directions the hard way — after assuming their project was Permitted Development and being told a full planning application is required. This guide explains the mechanics, the types most likely to affect London homeowners, and exactly how to check your address before spending on drawings.
In England, the government grants homeowners a set of standard rights to carry out certain works without planning permission — these are called Permitted Development (PD) rights. They are set out in the Town and Country Planning (General Permitted Development) (England) Order 2015.
An Article 4 Direction is a legal mechanism that allows a local council to take some of those rights away in a specific area. Once made, works that would previously have been PD now require a full planning application — just as if the rights had never existed.
The name comes from Article 4 of the GPDO, which is the provision that grants councils this power. The direction is a formal legal document that must be publicised, consulted on (for most types), and registered.
Crucially, an Article 4 Direction does not ban development — it just requires planning permission for it. The council must still assess any application fairly. But it does mean you cannot proceed without that permission, and refusal is possible.
If your project meets the PD criteria, you can build without applying for planning permission. You may choose to get a Lawful Development Certificate to confirm this in writing, but no formal consent is required.
Even if your project would otherwise be PD, you need a full planning application. The council assesses it against their local plan and design policies. They can approve it (with or without conditions) or refuse it. You have the right of appeal if refused.
Building in breach of an Article 4 Direction is the same as building without planning permission. The council can enforce — including requiring you to reverse the works. This also affects property sales and remortgaging.
Article 4 Directions can target any PD right. In London, these five types are the ones most likely to affect a residential project.
The most common type in London. Applied within Conservation Areas to remove PD rights for external alterations — most commonly replacing windows or doors with non-matching materials, adding satellite dishes to front elevations, cladding walls, or extending roofs. In many London Conservation Areas, even painting render or changing a front gate requires permission as a result.
Properties in any of London's hundreds of Conservation Areas
Some London boroughs — most notably Hackney and Islington — have used Article 4 Directions to withdraw PD rights for rear and side extensions across large swathes of residential streets, even outside Conservation Areas. These are borough-specific and street-specific. They are the most likely reason a seemingly standard extension requires a full planning application.
Specific residential streets in boroughs like Hackney, Islington, and Southwark
Many London boroughs have issued Article 4 Directions withdrawing the PD right to convert a standard family home (Use Class C3) into a House in Multiple Occupation (Use Class C4). This requires planning permission for the change of use and allows the council to control the density of HMOs in residential streets.
Properties in boroughs with high HMO concentration: Islington, Southwark, Haringey, Newham, Waltham Forest
A small number of boroughs — most notably the Royal Borough of Kensington & Chelsea — have issued borough-wide Article 4 Directions requiring planning permission for basement excavations that would otherwise proceed under PD. These followed high-profile structural failures in basement developments in dense terrace streets.
Specific boroughs with dense Victorian terrace housing: RBKC, parts of Hammersmith & Fulham
Since 2023, councils have had increased ability to use Article 4 Directions to remove the PD right to change a dwelling to short-term let use (Class C1). Several London boroughs are actively exploring or implementing these directions in areas with high short-term let concentrations.
Emerging — currently most active in Westminster, Kensington & Chelsea, and Tower Hamlets
These boroughs are the most likely to have Article 4 Directions that affect standard householder projects. This is not an exhaustive list — always check your specific address regardless of borough.
Extensive residential extension Article 4s across much of the borough, plus Conservation Area directions. Among the most Article 4-heavy boroughs for householders.
38 Conservation Area Article 4 Directions covering a very large proportion of the borough's housing stock. Also has basement-specific policy that operates similarly.
Borough-wide Article 4 Directions removing HMO PD rights, plus Conservation Area directions. Also uses Article 4s to control changes in specific residential neighbourhoods.
Article 4 Directions in Conservation Areas including Dulwich and Bermondsey, plus HMO restrictions. Dulwich is particularly affected due to combined Dulwich Estate covenant controls.
Borough-wide basement Article 4 Direction — one of the very few councils in England to have taken this step. Also has extensive Conservation Area directions.
Uses Article 4 Directions to control changes of use and protect the character of high-street and residential areas. Active in Conservation Areas throughout the borough.
The fastest method. Tools like CanUBuild check your specific address against Article 4 Direction data, Conservation Area boundaries, and Listed Building status — giving you an instant answer before any professional fee is paid.
Check my addressMost London councils publish maps and lists of their Article 4 Directions online. Search '[borough name] Article 4 Directions' or look in the council's planning constraints mapping tool. Quality varies significantly by borough.
Article 4 Directions are registered as local land charges. Your solicitor will check this during conveyancing searches. If you're not buying but planning works, you can request a Local Land Charges search yourself or through a solicitor.
An Article 4 Direction is a legal order made by a local planning authority under the Town and Country Planning (General Permitted Development) (England) Order 2015. It removes one or more categories of Permitted Development rights in a specified area — meaning works that would normally not need planning permission now do. Article 4 Directions are used far more in London than anywhere else in England.
The most reliable ways are: use an address-level planning constraint checker (the fastest option), search your council's planning portal for Article 4 Directions in your area, or call your local planning authority and ask. Article 4 Directions are borough and address-specific — you cannot determine whether one applies from the neighbourhood name alone. They are also noted on the Local Land Charges Register, which solicitors check during conveyancing.
No — Conservation Area designation and Article 4 Directions are legally separate. However, in London, most Conservation Areas do have one or more Article 4 Directions made specifically for them. These typically target windows, doors, roof alterations, and satellite dishes. But not every Conservation Area has an Article 4 Direction, and the scope of what each direction covers varies. Always check your specific address.
You will have carried out development without planning permission, which the council can enforce against. The council can issue an Enforcement Notice requiring you to reverse the works. Enforcement notices can be registered as local land charges, which affects the saleability of the property. If you discover works were done without the required permission, you can apply for retrospective planning permission — but approval is not guaranteed and legal costs can be significant.
Local planning authorities must follow a consultation and notice procedure before an Article 4 Direction takes effect. During the consultation period, representations can be made against it. Once confirmed, an Article 4 Direction can only be challenged by judicial review in the courts — an expensive and rarely successful route for individual homeowners. The more practical approach is to apply for planning permission for the works you want to carry out, and appeal if refused.
Enter your address and we check Article 4 Directions, Conservation Area boundaries, Listed Building status, and flood risk — plus nearby approved planning applications. You get a clear picture of what you can and can't build under PD before spending anything on an architect.