- Nation
- England
- Pricing region
- South West
- Postcode areas
- DT, BH, SP, BA
- Main towns
- Bournemouth, Poole, Weymouth, Christchurch
What do large HMO conversions (7+ sharers) in Dorset involve?
- Emergency lighting where the escape route needs it
- Second kitchen or extra kitchen capacity
- Protected stair and landing with fire doors and fire stopping
- Planning and building control drawings, coordinated with your designer
- Sound insulation between rooms and floors
- Feasibility review and measured survey
Which rules apply in Dorset?
- Mandatory HMO licence for 5 or more people in 2 or more households (since October 2018); councils can add additional licensing for smaller HMOs.
- 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.
- 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.
- A conversion can be a material change of use under the building regulations, so confirm with building control before work starts.
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 large HMO conversions (7+ sharers) cost in Dorset?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Conversion works per letting room (walls, linings, electrics, decoration; excludes kitchens, bathrooms and fire systems; our estimate) | £3,500 – £6,500 | £3,650 – £6,750 | letting room |
| Panel alarm system (Grade A type), larger HMO | £1,750 – £4,500 | £1,800 – £4,700 | house |
| Protected route upgrades: fire-resisting linings, fire stopping, lighting (three-storey house, our estimate) | £2,000 – £6,000 | £2,100 – £6,250 | house |
| Ensuite shower room added to a bedroom | £4,000 – £10,000 | £4,150 – £10,400 | ensuite |
| Communal HMO kitchen with extra cooking and sink capacity (our estimate from domestic ranges) | £8,000 – £18,000 | £8,300 – £18,700 | kitchen |
Typical time on site: 10–20 weeks. For a figure for your house, try the guide-price tool.
Large HMO conversions (7+ sharers) by town in Dorset
Questions about large HMO conversions (7+ sharers) in Dorset
Does a seven-bed HMO need planning permission?
In England, normally yes: seven or more unrelated sharers is a sui generis use outside class C4. Wales and Northern Ireland require permission for new HMOs anyway, and in Scotland more than five residents falls outside the houses class. Councils also apply concentration policies, so we check the address first.
What fire alarm does a large HMO need?
The fire risk assessment and the council decide; alarm grades come from guidance, not statute. For larger HMOs, council guides and the NI fire service guide commonly point to a Grade A panel system covering escape routes and rooms. We fit to the specification set, and give you the commissioning certificate.
Do you carry out large HMO conversions (7+ sharers) across Dorset?
Yes, across the whole of Dorset, including Bournemouth, Poole, Weymouth.
Who licenses HMOs in Dorset?
HMOs in Dorset 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 Dorset
- House to HMO conversion in Dorset
- Escape routes, emergency lighting and fire stopping in Dorset
- Fire alarm and detection systems in Dorset
- Sound insulation in Dorset
- Loft conversions for extra rooms in Dorset
- Extensions for extra rooms in Dorset
- Layout changes and room reconfiguration in Dorset
- HMO fire safety upgrades in Dorset