In short: A commercial to HMO conversion turns space that was never a home, such as upper floors over shops or small office buildings, into shared accommodation. We carry this out across Caerphilly, priced against the HMO rules for Wales and the council’s own standards.
- Nation
- Wales
- Pricing region
- Wales
- Postcode areas
- CF
- Main towns
- Caerphilly, Gelligaer, Blackwood, Bargoed, Nelson (Caerphilly)
What does commercial and above-shop to HMO in Caerphilly involve?
- Coordination with planning and building control
- New kitchens, bathrooms and ensuites
- Windows and thermal upgrades
- Fire separation between the commercial unit and the homes above
- Separate entrance and protected escape route
- Survey of structure, services and access
Which rules apply in Caerphilly?
- Landlords must register with Rent Smart Wales, and those who manage their own lets need a Rent Smart Wales licence.
- 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.
- Building regulations sound requirements can apply to conversions and new separating walls and floors.
Welsh councils set their own HMO standards and may run additional licensing. In Wales, changing a house to a C4 HMO always needs planning permission, so check planning first.
How much does commercial and above-shop to HMO cost in Caerphilly?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Conversion works per letting room (walls, linings, electrics, decoration; excludes kitchens, bathrooms and fire systems; our estimate) | £3,500 – £6,500 | £3,300 – £6,100 | letting room |
| Panel alarm system (Grade A type), larger HMO | £1,750 – £4,500 | £1,650 – £4,250 | house |
| Acoustic ceiling or floor upgrade, 12–15 m² | £800 – £2,700 | £750 – £2,550 | room |
| Communal HMO kitchen with extra cooking and sink capacity (our estimate from domestic ranges) | £8,000 – £18,000 | £7,500 – £16,900 | kitchen |
| Ensuite shower room added to a bedroom | £4,000 – £10,000 | £3,750 – £9,400 | ensuite |
Typical time on site: 12–24 weeks. For a figure for your house, try the guide-price tool.
Commercial and above-shop to HMO by town in Caerphilly
Questions about commercial and above-shop to HMO in Caerphilly
Do you work on listed or conservation area buildings?
Yes, with the right consents in place. Older high street buildings often need extra care with windows, fire upgrades and sound insulation.
Is building control needed?
Yes. Changing commercial space to residential use is a material change of use and needs building regulations approval.
Do you carry out commercial and above-shop to HMO across Caerphilly?
Yes, across the whole of Caerphilly, including Caerphilly, Gelligaer, Blackwood.
Who licenses HMOs in Caerphilly?
Caerphilly council licenses HMOs in its area. Landlords must also register with Rent Smart Wales.
Other HMO services in Caerphilly
- Large HMO conversions (7+ sharers) in Caerphilly
- Escape routes, emergency lighting and fire stopping in Caerphilly
- Sound insulation in Caerphilly
- EPC and energy upgrades in Caerphilly
- Rewires and EICR remedials in Caerphilly
- Layout changes and room reconfiguration in Caerphilly
- Student HMO refurbishment in Caerphilly
- Full HMO refurbishment in Caerphilly