What Is Article 4 and How Does It Affect HMO Finance?
An Article 4 Direction can remove the automatic permitted development right to change a property from a normal dwelling into a small HMO in parts of England. For an HMO investor, that can affect whether planning permission is needed, whether a proposed conversion is viable and, ultimately, whether a mortgage lender will be comfortable financing the property.
What does Article 4 mean for an HMO?
In England, a small HMO occupied by three to six unrelated people will generally fall within Use Class C4.
A standard family home usually sits within Use Class C3. In many areas, moving from C3 to C4 can take place under permitted development rights.
An Article 4 Direction changes that.
It allows a local planning authority to withdraw specified permitted development rights within a defined area. If the relevant C3-to-C4 right has been removed, planning permission may be required before creating the HMO.
That is why two identical houses a few streets apart can have very different HMO potential.
Does Article 4 mean HMOs are banned?
No. This is one of the biggest misunderstandings around Article 4.
An Article 4 Direction does not automatically prohibit HMOs. It removes a permitted development right, meaning the proposed change may need to go through the planning process instead.
The local authority can then assess the application against its planning policies.
That distinction matters when buying a property.
“HMOs exist in this area” does not necessarily mean you can convert another house into one.
Why does Article 4 matter to an HMO mortgage lender?
A lender is not only interested in the property's rental income.
It also needs to understand whether the property can lawfully operate in its intended form.
An HMO mortgage application may therefore involve questions about:
- the property's existing planning use
- when HMO use began
- whether planning permission was granted
- whether an Article 4 Direction applies
- evidence of established lawful use
- the number of intended occupants
- the HMO licence or licence application
If the planning position is unclear, a lender may ask for further evidence before proceeding.
In some cases, the choice of lender can also depend heavily on the exact planning situation.
What if the property was already an HMO before Article 4?
This is where the detail becomes important.
Article 4 does not simply erase an established lawful use because a direction is introduced later.
An existing HMO may have planning evidence showing that its use was already established. Depending on the circumstances, evidence around historic use or a lawful development certificate may become important.
A buyer should not simply rely on the seller saying:
“It has always been an HMO.”
You want the planning position properly evidenced.
For mortgage purposes, paperwork can matter just as much as the physical layout.
Is Article 4 the same as HMO licensing?
No. Planning and licensing are completely different systems.
Article 4 sits within the planning system.
HMO licensing deals with how qualifying HMOs are operated, managed and maintained.
In England, mandatory HMO licensing generally applies where five or more people from two or more households occupy the property and share facilities. Councils can also introduce additional licensing schemes covering smaller HMOs.
A property can therefore have the correct licence but still have a planning issue.
It can also have the correct planning status but still require a licence.
Check both.
What happens with HMOs containing more than six occupants?
In England, the C4 planning class covers small HMOs occupied by three to six unrelated people.
HMOs with more than six occupants normally fall outside C4 and are treated as sui generis, meaning “of its own kind”. A change into that use will normally require planning permission.
Article 4 is therefore particularly associated with smaller C3-to-C4 conversions, but larger HMO planning still needs careful checking.
What should you check before buying in an Article 4 area?
Do the planning homework before committing to the deal.
Check:
- the local authority's Article 4 map
- the property's existing planning use
- planning application history
- any lawful development certificates
- the proposed occupancy
- HMO licensing requirements
- whether your intended mortgage lender accepts the position
Do not wait until the valuation to discover a problem.
Does Article 4 make an HMO impossible to finance?
Not necessarily.
Plenty of HMOs in Article 4 areas can be financed.
The important issue is whether the planning position, licence, property and proposed use make sense to the lender.
Specialist HMO finance is rarely just about finding the lowest mortgage rate. Understanding the property first can prevent an attractive-looking deal becoming a very expensive planning problem later.
