- Nation
- England
- Pricing region
- East of England
- Postcode areas
- SG, AL, WD, HP
- Main towns
- Watford, Hemel Hempstead, Stevenage, St Albans, Welwyn Garden City
What do small HMO conversions (3–6 sharers) in Hertfordshire involve?
- Room-by-room size check before any work starts
- Electrical upgrades and certificate
- Second bathroom, shower room or ensuites
- Decoration and durable flooring
- Fire doors to rooms off the escape route
- Interlinked smoke and heat detection
Which rules apply in Hertfordshire?
- Under the Renters’ Rights Act, civil penalties reach £40,000 for offences such as running an unlicensed HMO.
- Floor area under a ceiling lower than 1.5 m does not count towards the room size, and many councils set larger sizes.
- Council standards often step up at 5 and 6 sharers, for example a separate WC at 5 and a second bathroom from 6.
- 3–6 unrelated sharers is use class C4; changing from a family house is usually permitted development unless an Article 4 direction applies.
- Fire precautions follow a risk assessment; the LACORS Housing – Fire Safety guide (2008) is guidance, not law, but many councils base their standards on it.
Councils in England can add additional licensing and Article 4 directions on top of the national rules. Check the council’s website for the exact address before you buy or start work.
How much do small HMO conversions (3–6 sharers) cost in Hertfordshire?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Typical 3–4 bed house to a 5–6 bed HMO, all-in | £30,000 – £75,000 | £31,800 – £79,500 | project |
| Conversion works per letting room (walls, linings, electrics, decoration; excludes kitchens, bathrooms and fire systems; our estimate) | £3,500 – £6,500 | £3,700 – £6,900 | letting room |
| Shared bathroom refit | £5,500 – £9,000 | £5,850 – £9,550 | bathroom |
| Interlinked mains alarm system (Grade D type), small HMO (our estimate from installer guides) | £800 – £2,000 | £850 – £2,100 | house |
| FD30S fire door leaf into an existing frame, with seals, closer and hinges, fitted | £300 – £600 | £320 – £640 | door |
Typical time on site: 4–10 weeks. For a figure for your house, try the guide-price tool.
Small HMO conversions (3–6 sharers) by town in Hertfordshire
- Watford
- Hemel Hempstead
- Stevenage
- St Albans
- Welwyn Garden City
- Cheshunt
- Hatfield
- Borehamwood
- Hitchin
- Hoddesdon
- Letchworth Garden City
- North Watford
- Harpenden
- Bushey
- Hertford
- Rickmansworth
- Potters Bar
- Berkhamsted
Questions about small HMO conversions (3–6 sharers) in Hertfordshire
How many bathrooms does a small HMO need?
National rules in England say amenities must be adequate for the number of sharers, and councils set the numbers: often a bathroom plus a separate WC at five people and a second bathroom from six. We work to the figure your council publishes.
What is the smallest room I can let?
In a licensed HMO in England, a room for one person aged 10 or over must be at least 6.51 square metres, not counting floor under a ceiling lower than 1.5 metres. Councils can set larger sizes, and Wales, Scotland and Northern Ireland have their own standards. We measure every room before you commit to a layout.
Do you carry out small HMO conversions (3–6 sharers) across Hertfordshire?
Yes, across the whole of Hertfordshire, including Watford, Hemel Hempstead, Stevenage.
Who licenses HMOs in Hertfordshire?
HMOs in Hertfordshire are licensed by the local council for the address. Where an area has several councils, each runs its own licensing and planning policies.
Other HMO services in Hertfordshire
- House to HMO conversion in Hertfordshire
- Ensuite installation in Hertfordshire
- Fire alarm and detection systems in Hertfordshire
- Communal kitchen refits in Hertfordshire
- Fire doors in Hertfordshire
- Licence condition and schedule-of-works in Hertfordshire
- Student HMO refurbishment in Hertfordshire
- Loft conversions for extra rooms in Hertfordshire