A house to HMO conversion turns a single-family home into a house in multiple occupation: a shared home for unrelated people with private bedrooms and shared kitchen or bathroom space. Landlords in Southampton (SO14 and SO15) usually come to us with a council letter, a fire risk assessment or a house they have just bought. We price from whichever you have. Southampton has a university population, so many shared houses are let to students on yearly tenancies, and summer is the main window for works.
- Area
- Hampshire, England
- Postcodes
- SO14 and SO15
- Location
- 43 miles south-west of Reading
- Council
- Southampton City Council
- Pricing region
- South East
What does house to HMO conversion in Southampton involve?
- A communal kitchen sized for the number of sharers
- New stud walls, door openings and room splits
- Fire doors, fire-rated linings and an interlinked fire alarm
- Rewiring or upgrades, with an electrical certificate
- Layout drawings showing bedrooms, kitchens, bathrooms and the escape route
Which rules apply in Southampton?
The rules below are the England-wide position for this kind of work. Councils add their own standards and schemes on top, so we always check the address in Southampton before we price.
- Licences last up to 5 years and carry conditions on gas and electrical safety, alarms, room sizes and waste.
- Licensed HMOs must meet national minimum bedroom sizes: 6.51 m² for one person aged 10 or over, 10.22 m² for two, and 4.64 m² for a child under 10.
- National rules ask for an adequate number of bathrooms, WCs and basins and suitably located kitchens; numeric ratios are set by each council.
- 7 or more sharers is a sui generis large HMO and normally needs planning permission.
Southampton City Council: local HMO schemes
| Article 4 (HMO) | In force across the council area City-wide Article 4 Direction (C3 to C4) adopted 23 Mar 2012. |
|---|---|
| Additional licensing | In force in part of the council area Additional licensing in nine wards (Banister & Polygon, Bargate, Bassett, Bevois, Freemantle, Millbrook, Portswood, Shirley, Swaythling) 1 Oct 2025-30 Sep 2030. |
| Selective licensing | No scheme found |
Schemes change. Check the council’s current pages for the exact address in Southampton before you buy or start work. Source: Southampton City Council HMO licensing page, checked 2026-10-31.
How much does house to HMO conversion cost in Southampton?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Typical 3–4 bed house to a 5–6 bed HMO, all-in | £30,000 – £75,000 | £33,600 – £84,000 | project |
| Conversion works per letting room (walls, linings, electrics, decoration; excludes kitchens, bathrooms and fire systems; our estimate) | £3,500 – £6,500 | £3,900 – £7,300 | letting room |
| Ensuite shower room added to a bedroom | £4,000 – £10,000 | £4,500 – £11,200 | ensuite |
| Communal HMO kitchen with extra cooking and sink capacity (our estimate from domestic ranges) | £8,000 – £18,000 | £8,950 – £20,150 | kitchen |
| Interlinked mains alarm system (Grade D type), small HMO (our estimate from installer guides) | £800 – £2,000 | £900 – £2,250 | house |
Prices in Southampton are shown with our regional adjustment for South East (above the UK average). Your quote is itemised and fixed in writing once the scope and specification are agreed.
How long does it take?
Allow 6–14 weeks on site for a typical job. Drawings, approvals and long-lead items such as kitchens or fire door sets are booked before we start.
If the house is let to students, we work backwards from the next tenancy start date in Southampton.
When do Southampton landlords need it?
We usually get the call when:
- A council has said an existing shared house needs works before a licence
- A family let is moving to room-by-room letting
Questions about house to HMO conversion in Southampton
Will the house pass licensing once the works are done?
We build to the standards your council publishes and give you the certificates and drawings an inspection asks for. The licence decision belongs to the licensing authority, so we never promise approval, but we design to meet the written standards from day one.
Do you cover all of Southampton?
Yes. We work across Southampton and the SO14 and SO15 postcode areas, plus the rest of Hampshire. Nearby places we also cover include Hythe, Totton, Eastleigh.
Which council covers HMOs in Southampton?
Southampton is covered by Southampton City Council. We read the council’s written HMO standards before pricing, and you should check the licence position for the exact address.
How much does house to HMO conversion cost in Southampton?
Our guide ranges for South East are in the table on this page, and the guide-price tool gives a figure for your house. A fixed written quote follows a free site visit.
House to HMO conversion near Southampton
- Hythe · 3 mi
- Totton · 4 mi
- Eastleigh · 5 mi
- Fareham · 10 mi
- Cowes · 11 mi
- Winchester · 12 mi
- All of Hampshire
Other HMO services in Southampton
- Small HMO conversions (3–6 sharers) in Southampton
- Large HMO conversions (7+ sharers) in Southampton
- HMO fire safety upgrades in Southampton
- Ensuite installation in Southampton
- Communal kitchen refits in Southampton
- Layout changes and room reconfiguration in Southampton
- Fire alarm and detection systems in Southampton
- Rewires and EICR remedials in Southampton