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. In Portsmouth, a place of roughly 210,000 people in Hampshire, the work is planned around the HMO rules for England and the council’s written HMO standards. With students as well as working sharers renting in Portsmouth, we plan bigger jobs for the gap between academic-year tenancies where we can.
- Area
- Hampshire, England
- Postcodes
- PO1, PO4 and PO5
- Location
- 15 miles south-east of Southampton
- Council
- Portsmouth City Council
- Pricing region
- South East
What does house to HMO conversion in Portsmouth involve?
- New stud walls, door openings and room splits
- Rewiring or upgrades, with an electrical certificate
- Extra bathrooms, shower rooms or ensuites
- Measured survey and room-size check against the licensing standards
- Decoration, flooring and a handover pack for licensing
Which rules apply in Portsmouth?
Here is what usually applies to a Portsmouth job of this kind. It is general information rather than legal advice, and the council’s written HMO standards have the final detail.
- Under the Renters’ Rights Act, civil penalties reach £40,000 for offences such as running an unlicensed HMO.
- 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.
Portsmouth City Council: local HMO schemes
| Article 4 (HMO) | In force across the council area Covers the whole city; in force since November 2011. |
|---|---|
| Additional licensing | In force across the council area City-wide additional HMO licensing 1 Sep 2023-31 Aug 2028. |
| Selective licensing | No scheme found |
Schemes change. Check the council’s current pages for the exact address in Portsmouth before you buy or start work. Source: Portsmouth City Council HMO licensing page, checked 2026-10-31.
How much does house to HMO conversion cost in Portsmouth?
| 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 |
Use these as a starting point for budgeting. Access, condition and the council’s requirements in Portsmouth can move the figure either way, which is why we quote after seeing the house.
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 Portsmouth.
When do Portsmouth landlords need it?
Landlords in Portsmouth most often ask us for this when:
- A council has said an existing shared house needs works before a licence
- You have bought, or are buying, a house to let to sharers
Questions about house to HMO conversion in Portsmouth
How long does a house to HMO conversion take?
Most conversions of a three or four-bedroom house take six to fourteen weeks on site, after drawings and any approvals. Bigger layout changes, extensions or loft rooms add time.
How far do you travel from Portsmouth?
We cover the whole of Hampshire and work UK-wide. For Portsmouth the nearest towns on our list are Gosport (2 miles), Fareham (5 miles), Ryde (6 miles).
Which council covers HMOs in Portsmouth?
Portsmouth is covered by Portsmouth 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 Portsmouth?
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 Portsmouth
- Gosport · 2 mi
- Fareham · 5 mi
- Ryde · 6 mi
- Havant · 6 mi
- Waterlooville · 6 mi
- Cowes · 9 mi
- All of Hampshire
Other HMO services in Portsmouth
- Small HMO conversions (3–6 sharers) in Portsmouth
- Large HMO conversions (7+ sharers) in Portsmouth
- HMO fire safety upgrades in Portsmouth
- Ensuite installation in Portsmouth
- Communal kitchen refits in Portsmouth
- Layout changes and room reconfiguration in Portsmouth
- Bedroom upgrades and room refits in Portsmouth
- Licence condition and schedule-of-works in Portsmouth