House to HMO conversion across Wiltshire

In short: 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. Across Wiltshire, the work is planned around England’s HMO rules and the standards the local council publishes.

Nation: England
Pricing region: South West
Postcode areas: SN, SP, BA, RG
Main towns: Swindon, Salisbury, Trowbridge, Chippenham

What does house to HMO conversion in Wiltshire involve?

Extra bathrooms, shower rooms or ensuites
Decoration, flooring and a handover pack for licensing
Fire doors, fire-rated linings and an interlinked fire alarm
Rewiring or upgrades, with an electrical certificate
A communal kitchen sized for the number of sharers
Layout drawings showing bedrooms, kitchens, bathrooms and the escape route

Which rules apply in Wiltshire?

Mandatory HMO licence for 5 or more people in 2 or more households (since October 2018); councils can add additional licensing for smaller HMOs.
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.
7 or more sharers is a sui generis large HMO and normally needs planning permission.
Building regulations cover structural changes, new partitions, ensuite drainage, fire-resisting construction and notifiable electrical work.

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 does house to HMO conversion cost in Wiltshire?

Regional adjustment for South West. Planning budgets: see our prices page.
Item	UK typical	Local guide	Per
Typical 3–4 bed house to a 5–6 bed HMO, all-in	£30,000 – £75,000	£31,200 – £78,000	project
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
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
Interlinked mains alarm system (Grade D type), small HMO (our estimate from installer guides)	£800 – £2,000	£830 – £2,100	house

Typical time on site: 6–14 weeks. For a figure for your house, try the guide-price tool.

House to HMO conversion by town in Wiltshire

Questions about house to HMO conversion in Wiltshire

Do I need planning permission to turn a house into an HMO?

It depends on the nation, the council and the number of sharers. In England, three to six unrelated sharers is use class C4, and moving from a family house is usually permitted development unless the council has an Article 4 direction; seven or more normally needs permission. In Wales a change to an HMO always needs permission, in Northern Ireland all new HMOs need it, and in Scotland council policy decides. We check the address before drawings start.

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 carry out house to HMO conversion across Wiltshire?

Yes, across the whole of Wiltshire, including Swindon, Salisbury, Trowbridge.

Who licenses HMOs in Wiltshire?

HMOs in Wiltshire are licensed by the local council for the address. Where an area has several councils, each runs its own licensing and planning policies.