Over the last few years, we’ve seen Article 4 Directions pop up across England at a rate that would have seemed unlikely a decade ago. In the past 18 months alone, councils from Walsall to Warrington, Durham to Dartford have either introduced or confirmed plans to require planning permission for HMO conversions that would previously have gone ahead without it. For investors, the question is no longer really whether an Article 4 Direction will affect your area, it’s when.
The good news is that if you know one is coming, there are usually things you can do. But the window to act is often shorter than people think, and the investors who come out on top are almost always the ones who got ahead of it.
What Is an Article 4 Direction?
Under permitted development rights, a standard dwelling (Use Class C3) can be converted into a small HMO (Use Class C4, for between three and six unrelated occupiers) without needing planning permission.
An Article 4 Direction takes those rights away within a defined area. Once it’s in force, you need planning permission for a conversion that would previously have happened automatically.
One thing worth flagging that often catches people out: this only applies to C4 HMOs of up to six occupants. Properties with seven or more are classed as Sui Generis, a separate planning category, and have always needed planning permission, Article 4 or not. If you’re thinking about scaling up beyond six occupants, that’s a different conversation entirely, and one worth having before any Article 4 comes into the picture.
Which Councils Are Bringing In Article 4 Directions Right Now?
The list keeps growing. Here’s a snapshot of confirmed and incoming directions as of mid-2026:
Newly in force:
- Oldham: A borough-wide Article 4 Direction came into effect on 1 January 2026.
- Walsall: A borough-wide direction came into force on 1 October 2025.
- Salford: Following a 2018 direction, a second direction took effect in November 2024, leaving only three wards where C3-to-C4 conversion remains permitted development.
- Erewash (Derbyshire): Confirmed at Full Council on 5 March 2026 following consultation in December 2025.
- Medway (Kent): An immediate direction covering seven wards in Chatham, Gillingham and Strood came into force in December 2025 with only a 21-day notice window. A second non-immediate direction covering areas south of the A2 will take effect on 10 December 2026.
Confirmed, but not yet in force:
- Durham County Council: Confirmed following over 1,400 consultation responses, with around 80% in support. Takes effect 17 August 2026.
- Warrington: Covering the Central Six Wards, due to come into force 25 September 2026.
- Hartlepool: Expected to come into force 1 December 2026 if confirmed.
- Dartford: The non-immediate direction for the area south of the A2 takes effect 10 December 2026.
If your area isn’t on this list, don’t take that as a green light. Plenty of councils are quietly building their evidence base right now, and announcements tend to come with less notice than investors expect.
How to Keep Track Without Trawling Through Council Websites
Keeping on top of Article 4 changes across multiple areas is genuinely hard. Every council publishes information differently, updates at different times, and often buries the relevant notices somewhere you wouldn’t naturally look. If you’re actively scouting new locations or managing a portfolio across different areas, it’s easy for something to slip through.
HMO Checker’s free Article 4 checker tool brings this all together in one place, with live data, so you can quickly check whether a postcode or area is affected without having to dig through planning portals. It’s a useful first port of call when you’re looking at a new acquisition or keeping tabs on areas you’re already active in.
That said, always treat the council’s own website as the definitive source of truth. The HMO Checker tool is great for a fast initial picture, but planning decisions can move quickly, and if you’re about to make a decision based on whether an Article 4 is in force, go and confirm it directly with the council first.
The Window That Most Investors Miss
Most Article 4 Directions are introduced as non-immediate directions, which means there’s typically a 12-month notice period before they kick in. During that window, your permitted development rights are still intact, and that’s a real opportunity if you move quickly.
But the Medway situation is a reminder that this isn’t guaranteed. Medway pushed through an immediate direction with just a 21-day notice period. Investors who were already across it had barely any time to act. Those who weren’t watching had none.
The takeaway here is simple: don’t wait for a direction to be confirmed before you start thinking about your options. By that point, the best moves may already be off the table.
Establishing a Lawful C4 Use Before Article 4
If a non-immediate direction has been announced, one of the most effective things you can do is get the property into genuine C4 HMO use before the direction comes into force.
That means:
- At least three unrelated tenants living in the property
- The occupation being genuine and lawful
- Solid evidence that the use started before the Article 4 implementation date
This is where we see a lot of investors trip up. Signed tenancy agreements on their own aren’t enough. The council will want to see that people were actually living there, not just that paperwork was signed. That means utility bills, council tax records, electoral roll registrations, bank statements, correspondence to the property. Things that show it was someone’s actual home.
We’ve worked with investors who were confident they’d established a lawful use, only to hit problems because tenants had signed agreements but weren’t genuinely in residence as their main home. The paper trail looked fine on the surface, the reality didn’t hold up. Don’t let paperwork mask what actually happened on the ground.
Should You Apply for a Lawful Development Certificate?
If there’s enough time before the Article 4 kicks in, a Lawful Development Certificate (LDC) can be a useful way to get formal confirmation that your C3-to-C4 conversion benefits from permitted development rights.
The catch is that councils introducing Article 4 Directions are usually well aware that HMO activity in their area is picking up — that’s often what prompted the direction in the first place. LDC applications submitted during this period can get a lot more scrutiny than usual, with longer decision timescales and requests for more information than you might expect.
For that reason, many investors prefer to get the use established first, then apply for a Certificate of Lawfulness for Existing Use (CLEUD) afterwards. The CLEUD is retrospective, it’s confirming what’s already happened rather than asking permission for what you’re proposing. Which route makes more sense comes down to timing and the specific council. But getting it wrong is costly, so it’s worth talking through before you commit.
Not All Article 4 Areas Work the Same Way
One thing we hear a lot is that investors write off an area the moment they hear it has an Article 4 Direction. That’s often the wrong call. An Article 4 doesn’t ban HMOs, it just means you need planning permission, and that permission will be looked at against the council’s local policies.
How those policies play out varies enormously, and it’s worth understanding the difference.
Targeted, ward-specific directions
A lot of councils only apply the Article 4 to the wards where HMO concentration is already a problem, leaving the rest of their area completely open. Warwick District Council is a good example — it applies its direction only to six specific wards in Leamington Spa. If you’re looking at properties in the same local authority area but outside those wards, you’re still on permitted development.
Borough-wide directions with concentration thresholds
Other councils go borough-wide but manage things through a percentage threshold. A common approach is to refuse permission where more than 10% of dwellings within a 100-metre radius are already in HMO use. Some areas set the bar even lower. York was looking at bringing its street-level threshold down to 5%. The point is that the existing HMO density around a specific site matters a lot when you’re assessing whether an application is likely to fly.
Immediate, evidence-led directions
Medway is a useful example of a council that moved quickly because the data was already clear. Their evidence showed that roughly 65% of the borough’s 1,018 HMOs were concentrated in the seven targeted wards, with Gillingham South alone making up about a fifth of the total. That evidence base didn’t just justify the immediate direction, it’ll also shape how planning applications in those wards are assessed going forward.
Knowing which of these models applies to your target area, and what the council’s track record looks like on HMO applications, is often more useful than simply knowing whether an Article 4 exists.
When Planning Permission Is the Only Route
If the direction is already in force and there was no window to take advantage of, a full planning application for C3-to-C4 change of use is where you start. That’s not necessarily a dead end, plenty of applications get approved where the case is well made and the site isn’t in an area the council’s own data flags as already saturated.
Before you put in an application, a pre-app conversation with the council is almost always worth doing. It can tell you how the council generally feels about new HMOs in that area, what thresholds are in play, and what they’ll want to see on things like parking, bin storage, cycle provision and room sizes. Most councils also publish an HMO Supplementary Planning Document (SPD) that lays a lot of this out, reading it before you spend money on a full application is just good sense.
It’s also worth using HMO Checker before you get that far. For properties that fall within an Article 4 area, HMO Checker provides a planning likelihood score so you can get a quick sense of how viable an application is likely to be before you invest time and money into it. It also pulls together lists of recently approved and refused applications in the area, which is genuinely useful. You can see what types of applications are getting through and what’s being knocked back, which tells you a lot about how the council is applying its policies in practice.
What Happens to Existing Lawful HMOs?
An Article 4 Direction doesn’t affect a use that was already lawfully established. If your property was genuinely operating as a C4 HMO before the direction came into force, it can keep running as one, the direction doesn’t change that.
This is why getting the evidence right matters so much. A well-documented lawful C4 use is a real asset and, in many cases, it also gives you flexibility to reconfigure the property internally without needing permission, as long as the use stays within the same class.
If you’ve got a property where the use was established before the direction but the paperwork is thin, it’s worth sorting out a CLEUD sooner rather than later. Tenants move on, memories fade, and records that feel easy to pull together today can get surprisingly difficult to reconstruct a couple of years down the line.
A Quick Checklist for Investors: Planning for Article 4
If an Article 4 Direction has been proposed or confirmed in your area:
- Find out exactly when it takes effect: non-immediate directions typically give you 12 months; immediate ones can give you as little as days
- Work out whether there’s still time to get a lawful C4 use established before the deadline
- Start gathering evidence of genuine occupation now: don’t wait until you need it
- Look into the council’s local HMO policies: concentration thresholds, their SPD, how they’ve decided similar applications
- Think about whether an LDC or CLEUD is the right move for your situation
- Talk to the council before you submit a full application: a pre-app can save a lot of wasted time and money
- Check whether your specific site is actually within the Article 4 boundary: many directions cover certain wards only, not the whole local authority area
The earlier you get across this, the more options you’ll have.
At HMO Designers and HMO Checker, we work with investors across England on exactly these situations, whether that’s helping establish a lawful use before an Article 4 takes effect, putting together an LDC or CLEUD application, or navigating the full planning process. If you’ve got a property or area you’re looking at, get in touch.
