HMO Article 4 directions: how to check if your street is covered

If you want to know whether your street sits inside an HMO Article 4 direction, the answer lives in two places: the local planning authority's own Article 4 register or planning policy pages, and the direction document itself, which carries a schedule of the streets or a plan with a red or hatched boundary. Nothing else is authoritative. A postcode checker, an agent's word or a nearby licensed HMO tells you nothing about whether the change of use from C3 to C4 still benefits from permitted development on your particular property.

Get this wrong and you have an unauthorised change of use, a refusal risk, and a mortgage or sale problem three years later when the buyer's solicitor asks for evidence.

What Class L gives you and what an Article 4 direction takes away

Under the Town and Country Planning (General Permitted Development) (England) Order 2015, Schedule 2 Part 3 Class L permits a change of use from Class C3 (dwellinghouse) to Class C4 (small house in multiple occupation, three to six unrelated occupiers sharing facilities), and back again. That is the whole of the national permission. It is one of the shortest classes in the Order, and it does not come with prior approval, a fee, or a notification step.

An Article 4 direction, made under Article 4 of the same Order, withdraws a specified permitted development right in a specified area. For HMOs, councils almost always withdraw the C3 to C4 leg only. Once the direction is in force, converting a family house to a three-to-six person shared house in that area is development requiring planning permission, and you apply for a full change of use application in the usual way.

Two practical consequences follow. The application is a full application rather than a householder one, so the fee band and the publicity requirements differ. And the council can refuse it on policy grounds, which is precisely why the direction was made.

Finding the direction, its map and its exact wording

Work through this in order, and stop when you have the document itself rather than a summary of it.

1. Search the council's website for "Article 4 direction" and look for a register or list. Article 15 of the Development Management Procedure Order 2015 requires notification and publicity when a direction is made, and most councils keep the confirmed directions and plans on a single page.
2. Open the direction document, not the web page describing it. You are looking for the date it was confirmed, the date it took effect, the class of permitted development withdrawn (it should name Schedule 2 Part 3 Class L), and the area of application.
3. Read the area definition. It will be either a plan with a boundary, a schedule of streets or wards, or both. Where the two conflict, the direction usually states which prevails, so read the recitals.
4. Check the effective date. A non-immediate direction is normally confirmed at least 12 months after it is made, so a use lawfully established before that date is not caught.
5. Cross-check the national dataset at planning.data.gov.uk, which publishes article-4-direction and article-4-direction-area layers collected from councils. Treat it as a signpost, not as the legal position, because coverage and currency vary by authority.
6. If the boundary is anywhere near your property, ask the council's planning policy or duty planning team in writing to confirm whether the specific address is within the direction area. Keep the reply.

That last step matters more than it sounds. Boundaries drawn at ward level on a small-scale plan can be ambiguous at the scale of a single terrace, and a written confirmation from the authority is worth having on file.

Whole-borough, ward and street-level coverage

Directions come in very different sizes, and the size tells you something about how the council intends to handle applications.

Some councils have made a second direction extending an earlier one, so you may need to read two documents together. Where an area has been the subject of a concentration study or an HMO supplementary planning document, the direction, the SPD and the adopted local plan policy on HMOs usually arrive as a set. Read the policy as well as the direction, because the policy contains the test your application will be judged against, typically a threshold on the proportion of HMOs within a set radius.

What the direction does not remove

This is where money is lost.

A C4 to C3 reversion is normally still permitted development, because councils rarely withdraw that leg. So if you have an existing lawful small HMO and you convert it back to a family house, you generally do not need permission, but you may then have lost the ability to go back the other way.

A large HMO, meaning seven or more occupiers sharing, is sui generis and falls outside Class C4 entirely. It has never benefited from Class L. Anywhere in England, in or out of an Article 4 area, going to seven or more sharers is a change of use requiring planning permission.

The direction also has nothing to do with HMO licensing under the Housing Act 2004. Mandatory licensing applies to HMOs of five or more occupiers forming two or more households, and additional licensing schemes can catch smaller properties. A licence is not planning permission, and a planning permission is not a licence. I have seen landlords produce a licence as evidence of lawful use and be told, correctly, that it proves nothing about planning.

And building work is separate again. Adding a rear extension, a loft dormer or an outbuilding to serve the HMO engages Schedule 2 Part 1 rights, which the HMO direction does not touch, though a separate householder Article 4 direction in a conservation area might.

Evidence councils expect for a C3 to C4 application

Once the right is withdrawn, you are making a planning judgement case, not a technical one. Most HMO policies turn on concentration, amenity for occupiers, amenity for neighbours, parking and refuse. A thin application invites refusal.

What typically needs to be in the pack:

• A planning statement addressing the adopted local plan HMO policy directly, including the concentration threshold and how the proposal sits against it, plus the relevant NPPF (December 2024 edition) policies on making effective use of land and on healthy, safe communities. A Planning Statement is the document that carries this argument.
• Existing and proposed floor plans with room areas in m², bedroom by bedroom, plus shared kitchen, bathroom and amenity space. Councils increasingly test against the Nationally Described Space Standard and their own HMO room-size standards.
• Refuse and recycling: a bin store location, capacity for the number of occupiers, and a drag distance to the collection point that the waste service will accept.
• Cycle parking, secure and covered, and usually one space per bedroom in urban authorities.
• Parking evidence where the policy or the highway authority asks for it. In controlled parking areas this often means a parking stress survey; the Lambeth methodology (overnight and mid-evening counts, midweek and weekend, outside school holidays) is the common approach. A Parking Survey sets out the counts and the resulting stress percentage.
• A short management statement covering occupancy, noise, garden maintenance and who responds to complaints. It is not a policy requirement everywhere, but it answers the objections before they arrive.

An illustrative example

Illustrative only. A three-bedroom 1930s semi in a ward-level Article 4 area, proposed for five sharers by converting the rear reception room to a bedroom. The council's policy allows HMOs unless more than 10 per cent of properties within 100 metres are already in HMO use. The applicant's statement maps every licensed HMO within that radius from the council's own licensing register, shows the figure below the threshold, and pairs it with a parking stress count of 82 per cent overnight against a policy trigger of 85 per cent. That is a case an officer can recommend. Change the concentration figure to 14 per cent and no amount of drafting rescues it.

Proving an existing HMO is lawful

If the use began before the direction took effect, or ran for long enough to become immune, you can regularise it with a certificate of lawfulness of existing use or development under section 191 of the Town and Country Planning Act 1990. That is the only formal way to confirm the position. A council email is helpful; a certificate is binding.

The immunity period for a change of use to a single dwellinghouse is four years, and for other breaches it is ten years, with the Levelling-up and Regeneration Act 2023 moving the general period to ten years for breaches occurring after commencement. Which period applies to an HMO depends on the facts and the dates, so take advice.

Evidence that carries weight: tenancy agreements running continuously across the period, council tax and utility records, HMO licence history, electoral roll entries, and a statutory declaration from the landlord or managing agent. Gaps are fatal, because the burden of proof sits with the applicant on the balance of probability.

What to do next

Check the direction and its effective date before you offer on a property, not after. Where the property is inside a direction area, price in a full change of use application, the concentration test in the adopted local plan, and the possibility that a parking survey has to be timed outside school holidays. Where it is outside, keep the evidence of that position with the file.

This is general guidance, not legal advice; check the position with your local planning authority or a qualified professional before relying on it.

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