An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. In Bath, a place of roughly 100,000 people in Somerset, the work is planned around the HMO rules for England and the council’s written HMO standards. Bath has a university population, so many shared houses are let to students on yearly tenancies, and summer is the main window for works.
- Area
- Somerset, England
- Postcodes
- BA1
- Location
- 12 miles south-east of Bristol
- Council
- Bath and North East Somerset Council
- Pricing region
- South West
What do extensions for extra rooms in Bath involve?
- Ensuite drainage and extraction
- Party wall coordination where needed
- Fire separation and detection extended to the new space
- Kitchen or bedroom fit-out
- Planning route check and drawings
Which rules apply in Bath?
Here is what usually applies to a Bath job of this kind. It is general information rather than legal advice, and the council’s written HMO standards have the final detail.
- 3–6 unrelated sharers is use class C4; changing from a family house is usually permitted development unless an Article 4 direction applies.
- Building regulations cover structural changes, new partitions, ensuite drainage, fire-resisting construction and notifiable electrical work.
- The Fire Safety Order 2005 applies to the common parts of HMOs, enforced by the fire and rescue authority.
- Council standards often step up at 5 and 6 sharers, for example a separate WC at 5 and a second bathroom from 6.
Bath and North East Somerset Council: local HMO schemes
| Article 4 (HMO) | In force in part of the council area Article 4 Direction (C3 to C4) covers the whole City of Bath (not the wider district), in effect 1 Jul 2013. |
|---|---|
| Additional licensing | No scheme found |
| Selective licensing | No scheme found |
Schemes change. Check the council’s current pages for the exact address in Bath before you buy or start work. Source: Bath and North East Somerset Council HMO licensing page, checked 2026-10-31.
How much do extensions for extra rooms cost in Bath?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Single-storey extension, about 15 m² | £35,000 – £60,000 | £36,400 – £62,400 | project |
| Single-storey extension per m² | £1,800 – £4,000 | £1,850 – £4,150 | m² |
Use these as a starting point for budgeting. Access, condition and the council’s requirements in Bath can move the figure either way, which is why we quote after seeing the house.
How long does it take?
Typical time on site: 8–14 weeks. We agree the programme with you before starting and send photo updates as the work progresses.
If the house is let to students, we work backwards from the next tenancy start date in Bath.
When do Bath landlords need it?
Typical reasons for this work in Bath:
- Adding a ground-floor room
- Moving to more sharers with consent
Questions about extensions for extra rooms in Bath
Is a kitchen extension worth it?
Often, when the existing kitchen limits how many people the council will allow. A bigger kitchen can unlock an extra room.
Which postcodes in Bath do you work in?
All of them, including BA1, and the surrounding parts of Somerset.
Which council covers HMOs in Bath?
Bath is covered by Bath and North East Somerset Council. We read the council’s written HMO standards before pricing, and you should check the licence position for the exact address.
How much do extensions for extra rooms cost in Bath?
Our guide ranges for South West 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.
Extensions for extra rooms near Bath
- Trowbridge · 8 mi
- Kingswood · 8 mi
- Mangotsfield · 10 mi
- Frome · 10 mi
- Bristol · 12 mi
- Yate · 12 mi
- All of Somerset