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 Llantwit Major 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
- Vale of Glamorgan, Wales
- Postcodes
- CF61
- Location
- 14 miles west of Cardiff
- Pricing region
- Wales
What do extensions for extra rooms in Llantwit Major involve?
- Party wall coordination where needed
- Heating, insulation and glazing
- Ensuite drainage and extraction
- Foundations, structure and roof
- Fire separation and detection extended to the new space
Which rules apply in Llantwit Major?
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 Llantwit Major before we price.
- More than 6 sharers is a sui generis HMO and needs planning permission; councils such as Cardiff apply concentration limits.
- 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 Llantwit Major?
| 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 |
Use these as a starting point for budgeting. Access, condition and the council’s requirements in Llantwit Major can move the figure either way, which is why we quote after seeing the house.
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 Llantwit Major landlords need it?
Typical reasons for this work in Llantwit Major:
- Adding a ground-floor room
- Moving to more sharers with consent
Questions about extensions for extra rooms in Llantwit Major
Do you handle building control?
Yes, from application to completion certificate.
How far do you travel from Llantwit Major?
We cover the whole of Vale of Glamorgan and work UK-wide. For Llantwit Major the nearest towns on our list are Bridgend (8 miles), Coity (8 miles), Barry (9 miles).
Does a shared house in Llantwit Major 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 Llantwit Major?
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 Llantwit Major
- Bridgend · 8 mi
- Coity · 8 mi
- Barry · 9 mi
- Llantrisant · 10 mi
- Porthcawl · 10 mi
- Pyle · 12 mi
- All of Vale of Glamorgan
Other HMO services in Llantwit Major
- Loft conversions for extra rooms in Llantwit Major
- Communal kitchen refits in Llantwit Major
- Layout changes and room reconfiguration in Llantwit Major
- Large HMO conversions (7+ sharers) in Llantwit Major
- Ensuite installation in Llantwit Major
- House to HMO conversion in Llantwit Major
- Fire alarm and detection systems in Llantwit Major
- EPC and energy upgrades in Llantwit Major