- Nation
- Wales
- Pricing region
- Wales
- Postcode areas
- LL, SY
- Main towns
- Bangor (Gwynedd)
What do large HMO conversions (7+ sharers) in Gwynedd involve?
- Sound insulation between rooms and floors
- Second kitchen or extra kitchen capacity
- Ensuites or extra bathrooms
- Protected stair and landing with fire doors and fire stopping
- Feasibility review and measured survey
- Planning and building control drawings, coordinated with your designer
Which rules apply in Gwynedd?
- Mandatory licence for HMOs with 3 or more storeys and 5 or more people in 2 or more households; Wales did not adopt England’s 2018 change.
- England’s national room sizes do not apply in Wales; councils set their own room standards.
- Kitchen and bathroom ratios are set in each council’s HMO standards.
- 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.
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 do large HMO conversions (7+ sharers) cost in Gwynedd?
| 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 |
| Protected route upgrades: fire-resisting linings, fire stopping, lighting (three-storey house, our estimate) | £2,000 – £6,000 | £1,900 – £5,650 | house |
| Ensuite shower room added to a bedroom | £4,000 – £10,000 | £3,750 – £9,400 | ensuite |
| Communal HMO kitchen with extra cooking and sink capacity (our estimate from domestic ranges) | £8,000 – £18,000 | £7,500 – £16,900 | kitchen |
Typical time on site: 10–20 weeks. For a figure for your house, try the guide-price tool.
Large HMO conversions (7+ sharers) by town in Gwynedd
Questions about large HMO conversions (7+ sharers) in Gwynedd
Do you handle building control?
Yes. The building work in a large HMO conversion (partitions, fire separation, drainage, electrics) needs to meet the building regulations, and the conversion can also count as a material change of use. We confirm the route with building control, coordinate inspections and give you the completion paperwork.
Can you work with my architect?
Yes. We often build from an architect’s drawings, or we can recommend a designer to prepare them.
Do you carry out large HMO conversions (7+ sharers) across Gwynedd?
Yes, across the whole of Gwynedd, including Bangor (Gwynedd).
Who licenses HMOs in Gwynedd?
Gwynedd council licenses HMOs in its area. Landlords must also register with Rent Smart Wales.
Other HMO services in Gwynedd
- House to HMO conversion in Gwynedd
- Escape routes, emergency lighting and fire stopping in Gwynedd
- Fire alarm and detection systems in Gwynedd
- Sound insulation in Gwynedd
- Loft conversions for extra rooms in Gwynedd
- Extensions for extra rooms in Gwynedd
- Void and between-tenancy refurbs in Gwynedd
- HMO fire safety upgrades in Gwynedd