An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. In Treharris, a town of about 12,000 people in Merthyr Tydfil, the work is planned around the HMO rules for Wales and the council’s written HMO standards.
- Area
- Merthyr Tydfil, Wales
- Postcodes
- CF45 and CF46
- Location
- 14 miles north-west of Cardiff
- Pricing region
- Wales
What do extensions for extra rooms in Treharris involve?
- Heating, insulation and glazing
- Fire separation and detection extended to the new space
- Planning route check and drawings
- Kitchen or bedroom fit-out
- Foundations, structure and roof
Which rules apply in Treharris?
Here is what usually applies to a Treharris 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 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 Treharris?
| 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 |
Prices in Treharris are shown with our regional adjustment for Wales (below the UK average). Your quote is itemised and fixed in writing once the scope and specification are agreed.
How long does it take?
Most jobs of this kind take 8–14 weeks. If a council deadline applies in Treharris, tell us at the first call so the programme is built around it.
When do Treharris landlords need it?
We usually get the call when:
- A kitchen too small for the number of sharers
- Adding a ground-floor room
Questions about extensions for extra rooms in Treharris
Can I extend an HMO under permitted development?
Some extensions to houses are permitted development, but rules differ for HMOs and by nation and council. We check the address before design.
How far do you travel from Treharris?
We cover the whole of Merthyr Tydfil and work UK-wide. For Treharris the nearest towns on our list are Nelson (Caerphilly) (1 miles), Gelligaer (2 miles), Bargoed (3 miles).
Does a shared house in Treharris 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 Treharris?
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 Treharris
- Nelson (Caerphilly) · 1 mi
- Gelligaer · 2 mi
- Bargoed · 3 mi
- Blackwood · 4 mi
- Pontypridd · 5 mi
- Rhondda · 6 mi
- All of Merthyr Tydfil
Other HMO services in Treharris
- Loft conversions for extra rooms in Treharris
- Communal kitchen refits in Treharris
- Layout changes and room reconfiguration in Treharris
- Large HMO conversions (7+ sharers) in Treharris
- Ensuite installation in Treharris
- House to HMO conversion in Treharris
- Escape routes, emergency lighting and fire stopping in Treharris
- Commercial and above-shop to HMO in Treharris