Thinking of Creating an HMO? Councils Now Control the Planning, Not Just the Licence

For years the mental model for turning a family home into a shared house was simple: get the HMO licence and meet its conditions. That's no longer the whole story. A growing number of councils are using Article 4 directions to take away the automatic right to convert a home into a small HMO — meaning in those areas you now need full planning permission to do it, on top of any licence. Several councils have tightened or introduced these controls in recent months, and it's caught landlords out mid-project. If you're thinking of creating an HMO — or already run one — here's what changed and what to check. Article 4 and planning are separate from licensing and vary by council, so this is general guidance: confirm your area's position with the council and on GOV.UK.

What Article 4 actually does

Normally, converting a single family home (planning use class C3) into a small HMO — broadly a house shared by three to six unrelated people (class C4) — is "permitted development," so it doesn't need a planning application. An Article 4 direction is a tool a council can use to remove that permitted-development right in a designated area. Where one is in force, that C3-to-C4 conversion stops being automatic and requires a full planning application, which the council can refuse. Larger HMOs have always needed planning consideration; Article 4 extends the hurdle down to small HMOs too.

What's caught — and what to check

• Converting a family home to a small (3–6 person) HMO in an Article 4 area now needs planning permission first.
• Article 4 is area-specific — it applies only where the council has designated it, so two similar streets can have completely different rules.
• It's separate from licensing — planning permission and an HMO licence are two different consents, and having one doesn't give you the other.
• Larger HMOs (typically seven or more sharers) generally need planning permission regardless of Article 4.
• Existing, established HMOs may be unaffected, but changing use or size can trigger the need for permission — check before you alter anything.

The two-front squeeze on HMOs

The bigger picture for HMO landlords is that the obligations now come from two directions at once — planning and licensing — and each HMO already carries a heavier compliance stack than a standard let. On top of the licence and any planning consent, an HMO typically brings enhanced fire-safety requirements, minimum room-size and amenity standards, and specific management duties, all underpinned by the same core certificates every let needs — a valid Gas Safety Certificate, a satisfactory EICR, and working alarms. The result is more documents, more renewal dates, and more that can lapse — per property. And letting an unlicensed licensable HMO is one of the offences that can bring a Rent Repayment Order, so the stakes for getting it wrong are high.

What landlords should do

1. Check Article 4 before you commit — for any property you plan to run as an HMO, confirm whether the address is in an Article 4 area and whether planning permission is needed.
2. Treat planning and licensing separately — line up both consents; don't assume a licence covers the change of use.
3. Confirm the licence type — mandatory, additional or selective — using our guide to whether you need a landlord licence, and how to check your specific street.
4. Keep the whole HMO stack in one place — licence, any planning consent, gas, electrical, fire and alarm records, with every renewal date tracked.
5. Verify with the council and GOV.UK before buying, converting or changing how an HMO is used.

HMOs can still be a strong strategy — but they're now a two-consent, high-compliance one, and the landlords who avoid trouble are the ones who check planning and licensing up front and keep every document to hand. It's the same discipline a council relies on when it asks for your records: know your obligations per property, and be able to prove you've met them.

General guidance for UK landlords, not legal or planning advice. Planning use classes, Article 4 directions, HMO definitions, licensing and the associated standards are set by government and individual local authorities, vary by area, and can change — always confirm the position for your specific property with its council and at GOV.UK, and take professional planning advice before converting or buying with an HMO in mind.