An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. For a house in Llanelli we start with a measured survey, check the council’s written HMO standards for the number of sharers, and then price each item separately.
- Area
- Carmarthenshire, Wales
- Postcodes
- SA14 and SA15
- Location
- 10 miles north-west of Swansea
- Pricing region
- Wales
What do extensions for extra rooms in Llanelli involve?
- Building control completion
- Ensuite drainage and extraction
- Party wall coordination where needed
- Foundations, structure and roof
- Kitchen or bedroom fit-out
Which rules apply in Llanelli?
The rules below are the Wales-wide position for this kind of work. Councils add their own standards and schemes on top, so we always check the address in Llanelli before we price.
- 3–6 sharers is use class C4, and in Wales changing a house to C4 always needs planning permission; only C4 back to C3 is permitted development.
- Building regulations cover structural work, partitions, drainage, fire-resisting construction and electrics; confirm with building control whether the conversion is a material change of use.
- Council HMO standards and the fire risk assessment set detection, fire doors and escape routes.
- Kitchen and bathroom ratios are set in each council’s HMO standards.
How much do extensions for extra rooms cost in Llanelli?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Single-storey extension, about 15 m² | £35,000 – £60,000 | £32,900 – £56,400 | project |
| Single-storey extension per m² | £1,800 – £4,000 | £1,700 – £3,750 | m² |
These are typical ranges including VAT, adjusted for Wales, where costs run below the UK average. The fixed price for a house in Llanelli follows a site visit.
How long does it take?
Allow 8–14 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.
When do Llanelli landlords need it?
We usually get the call when:
- Adding a ground-floor room
- Moving to more sharers with consent
Questions about extensions for extra rooms in Llanelli
Do you handle building control?
Yes, from application to completion certificate.
Which postcodes in Llanelli do you work in?
All of them, including SA14 and SA15, and the surrounding parts of Carmarthenshire.
Does a shared house in Llanelli need an HMO licence?
In Wales, mandatory licensing covers HMOs of 3 or more storeys with 5 or more people. Many councils, including Cardiff and Swansea, also run additional licensing for smaller HMOs. Every landlord must register with Rent Smart Wales.
How much do extensions for extra rooms cost in Llanelli?
Our guide ranges for Wales 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 Llanelli
- Gorseinon · 5 mi
- Swansea · 10 mi
- Ammanford · 11 mi
- Clydach · 11 mi
- Carmarthen · 13 mi
- Briton Ferry · 15 mi
- All of Carmarthenshire
Other HMO services in Llanelli
- Loft conversions for extra rooms in Llanelli
- Communal kitchen refits in Llanelli
- Layout changes and room reconfiguration in Llanelli
- Large HMO conversions (7+ sharers) in Llanelli
- Ensuite installation in Llanelli
- House to HMO conversion in Llanelli
- Commercial and above-shop to HMO in Llanelli
- Escape routes, emergency lighting and fire stopping in Llanelli