In Gwynedd the average household spends £937 a year on heating — 2% lower than the UK average of £960. Typical homes are 80.0 m² with 4.1 rooms. The local population is around 21,571 residents (Census 2021). Switching to an air-source heat pump could save up to £375 a year for an average home after the £7,500 Boiler Upgrade Scheme grant.


Areas covered

Caernarfon, Bethel (Gwynedd), Bontnewydd, Caeathro, Brynrefail, Clwt-y-Bont, Deiniolen, Penisarwaun, Beddgelert, Ceunant, Cwm-y-glo, Llanberis, Llanrug, Nant Gwynant, Nant Peris, Waunfawr

See more in the LL area hub.

Typical air-source heat-pump installation costs range from about £6,000 at the low end to roughly £18,000 at the high end. Most homes fall somewhere between £7,000 and £15,000. These prices are before the £7,500 BUS grant (in addition, qualifying rural and island homes in Scotland may receive a further £1,500 uplift under the Home Energy Scotland scheme, for up to £9 000 of grant funding).

Installation costs in Gwynedd are broadly in line with the UK average.

CategoryNational cost range Adjusted for LL55 (×0.96) Net after £7,500 BUS grant
Small flats / simple installs £ 6,000 – £ 7,000 £ 5,760 – £ 6,720 from ~£ 1,000*
2–3-bed semis / moderate upgrades £ 8,000 – £ 12,000 £ 7,680 – £ 11,520 from ~£ 1,000*
Large detached / extensive work £ 13,000 – £ 18,000 £ 12,480 – £ 17,280 £ 4,980 – £ 9,780

* Minimum net costs rarely fall below £1,000 after grant, since most installs incur at least minor extra work.

Lower end
  • Minimal groundwork or plumbing modification required
  • Well-insulated homes that only need a compact ASHP unit
Mid end
  • Moderate radiator or underfloor-heating upgrades
  • Typical pump size (8–12 kW)
Upper end
  • Large detached houses or older properties needing major pipework
  • Extensive insulation or radiator replacement
  • Multi-zone controls and bespoke system design

Heat pump FAQs

How much does a heat pump cost here?

About £2,740 for a typical 3-bedroom home after the £7,500 grant.

How much can I save on heating bills?

Roughly £375 per year for the average home at current price-cap rates.

  • £937 Average Heating Cost UK avg £960
  • 80.0 m² Median Floor Area UK avg 84.7 m²
  • 4.1 Average Rooms UK avg 4.4

Local energy snapshot

Latest tariff window: 2025Q4

Ofgem region & price cap

North Wales and Mersey · 27.72p/kWh · 69.95p/day

PV potential (south-facing)

859 kWh per kWp/year

Dwelling mix

House 74.9% Flat 11.1% Bungalow 12.3% Detached 24.2% Semi-detached 28% Terraced 47%

EPC certificates

5,556 on record

Ready to get started?

Blue Ape Renewables will handle your free quote and £7,500 grant application

Get Free Quote & Grant Help →

MCS certified • Grant application handled • 4.8★ Trustpilot • Octopus Energy partner

Also in Your Area: Solar Panel Potential

Heat pumps increase electricity usage. Solar panels can offset your higher bills.

Without heat pump:

Solar saves ~£734/year
Payback: 13.9 years

With heat pump:

Solar saves ~£886/year
Payback: 11.5 years

  • Typical system 5 kW
  • Installation cost ~£10,200
  • Annual generation 4,293 kWh

See detailed solar data for LL55 →

Data from our sister site, Solar By Postcode UK

Compare nearby areas: LL52 (Gwynedd) · LL53 (Gwynedd) · LL54 (Gwynedd) · LL56 (Gwynedd) · LL57 (Gwynedd) · LL58 (Isle of Anglesey)

Heat Pump Installation & Ownership Guide

Timeline, planning rules, maintenance and what to expect
Loading the guide…

Official Heat Pump Resources & Data Sources

BUS, Ofgem, planning rules, MCS and the data behind the numbers
Loading official links…