In short: HMO energy upgrades improve the energy performance certificate (EPC) rating and cut running costs: loft and wall insulation, heating and controls, glazing, ventilation and lighting. In Swansea we survey first, price each item separately and hand over the certificates and photos a council asks for.
- Nation
- Wales
- Pricing region
- Wales
- Postcode areas
- SA
- Main towns
- Swansea, Gorseinon, Clydach
What do EPC and energy upgrades in Swansea involve?
- Review of the EPC recommendations
- Loft and roof insulation
- Double or secondary glazing
- Ventilation to control condensation
- Internal or external wall insulation
- A post-works EPC through your assessor
Which rules apply in Swansea?
- Rented homes must meet at least EPC E. Whether the planned EPC C standard will apply in Wales has not yet been confirmed.
- Councils assess hazards, including damp and mould, under the HHSRS, alongside the fitness for human habitation rules for occupation contracts.
- 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.
Swansea Council: local HMO schemes
| Additional licensing | In force in part of the council area Additional licensing in Castle, Uplands, St Thomas and Waterfront wards from 14 Feb 2026 for five years (replaced 2020 Castle/Uplands scheme). |
|---|---|
| Selective licensing | No scheme found |
Schemes change. Check the council’s current pages for the exact address in Swansea before you buy or start work. Source: Swansea Council HMO licensing page, checked 2026-10-31.
How much do EPC and energy upgrades cost in Swansea?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Loft insulation, whole house | £650 – £1,250 | £610 – £1,200 | house |
| Internal wall insulation | £60 – £100 | £60 – £90 | m² of wall |
Typical time on site: 2–15 working days. For a figure for your house, try the guide-price tool.
EPC and energy upgrades by town in Swansea
Questions about EPC and energy upgrades in Swansea
Are there grants?
Some schemes support landlords. Eligibility changes, so check the current government and energy company schemes for your nation.
Which upgrade gives the best EPC improvement?
It depends on the house. Loft insulation and heating controls are often the cheapest gains; wall insulation and heating systems make larger differences.
Do you carry out EPC and energy upgrades across Swansea?
Yes, across the whole of Swansea, including Swansea, Gorseinon, Clydach.
Who licenses HMOs in Swansea?
Swansea council licenses HMOs in its area. Landlords must also register with Rent Smart Wales.
Other HMO services in Swansea
- Damp, mould and HHSRS repairs in Swansea
- Full HMO refurbishment in Swansea
- Commercial and above-shop to HMO in Swansea
- Rewires and EICR remedials in Swansea
- Professional and co-living HMO refurbs in Swansea
- Loft conversions for extra rooms in Swansea
- Escape routes, emergency lighting and fire stopping in Swansea
- Void and between-tenancy refurbs in Swansea