RFPGHMO Conversion Costs: What a House-Share Conversion Really Costs in the UK
Converting a standard house into a licensed HMO (House in Multiple Occupation) usually costs far more than investors expect, because the big spend isn't cosmetic — it's fire safety, extra bathrooms, and licensing compliance.
What drives HMO conversion cost
| Item | Typical cost |
|---|---|
| Fire doors, alarms & emergency lighting (per property) | £3,000 – £7,000 |
| Additional en-suite / shower room | £4,000 – £7,000 each |
| Room reconfiguration / stud walls | £1,500 – £4,000 per room |
| Rewire to meet HMO electrical standards | £3,500 – £7,000 |
| Kitchen upgrade to shared-use standard | £5,000 – £12,000 |
Costs vary by local authority licensing requirements — mandatory, additional, and selective licensing schemes all have different minimum standards. Check your council's HMO licensing page before budgeting, since it directly changes what work is required.
Licensing is a cost, not just paperwork
Beyond the physical works, most HMOs above the mandatory licensing threshold (5+ occupants, 2+ households) need a licence from the local council, which comes with minimum room size rules, fire safety sign-off, and periodic inspection. Budgeting for the works without checking the licensing standard first is the most common way HMO conversion costs balloon mid-project.
Scan the property and get an itemised HMO cost estimate →How RFPG helps on an HMO conversion
Walk the property on camera and RFPG breaks the cost down room by room and trade by trade — flagging where fire doors, extra bathrooms, or rewiring are likely needed based on the current layout and condition. It's a fast sanity-check before you commit to a full conversion quote, not a replacement for sign-off from a qualified fire risk assessor.
FAQs
Do I need planning permission for an HMO? Small HMOs (up to 6 occupants) often fall under permitted development, but many councils have removed this via an Article 4 direction — always check locally before assuming.
What's a realistic total conversion budget? For a standard 3-bed to 5-bed HMO conversion, typical published ranges are £25,000–£45,000 all-in, though this varies significantly by starting condition and local licensing standard. We cannot verify these figures.