An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. Blackwood is 13 miles north of Cardiff. We price extensions for extra rooms there against Wales’s HMO rules and the council’s written HMO standards, so work is planned to the standard an inspection looks for.
- Area
- Caerphilly, Wales
- Postcodes
- CF81, CF82 and NP12
- Location
- 13 miles north of Cardiff
- Pricing region
- Wales
What do extensions for extra rooms in Blackwood involve?
- Heating, insulation and glazing
- Party wall coordination where needed
- Foundations, structure and roof
- Ensuite drainage and extraction
- Building control completion
Which rules apply in Blackwood?
Extensions for extra rooms in Blackwood must satisfy national law for Wales, the council’s written HMO standards and, where walls, drainage or fire separation change, the building rules. In short:
- 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.
- Fitness for human habitation rules require mains-powered, interlinked smoke alarms on every storey and CO alarms where there is a gas, oil or solid-fuel appliance.
- Kitchen and bathroom ratios are set in each council’s HMO standards.
How much do extensions for extra rooms cost in Blackwood?
| 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 Blackwood 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?
Typical time on site: 8–14 weeks. We agree the programme with you before starting and send photo updates as the work progresses.
When do Blackwood landlords need it?
Landlords in Blackwood most often ask us for this when:
- A kitchen too small for the number of sharers
- Moving to more sharers with consent
Questions about extensions for extra rooms in Blackwood
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 Blackwood?
We cover the whole of Caerphilly and work UK-wide. For Blackwood the nearest towns on our list are Bargoed (2 miles), Gelligaer (2 miles), Nelson (Caerphilly) (3 miles).
Does a shared house in Blackwood 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 Blackwood?
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 Blackwood
- Bargoed · 2 mi
- Gelligaer · 2 mi
- Nelson (Caerphilly) · 3 mi
- Treharris · 4 mi
- Risca · 6 mi
- Caerphilly · 6 mi
- All of Caerphilly
Other HMO services in Blackwood
- Loft conversions for extra rooms in Blackwood
- Communal kitchen refits in Blackwood
- Layout changes and room reconfiguration in Blackwood
- Large HMO conversions (7+ sharers) in Blackwood
- Ensuite installation in Blackwood
- House to HMO conversion in Blackwood
- Shared bathroom and shower room refits in Blackwood
- Licence condition and schedule-of-works in Blackwood