In North Northamptonshire the average household spends £814 a year on heating — 15% lower than the UK average of £960. Typical homes are 75.0 m² with 4.3 rooms. The local population is around 29,037 residents (Census 2021). Switching to an air-source heat pump could save up to £326 a year for an average home after the £7,500 Boiler Upgrade Scheme grant.


Areas covered

Wellingborough, Chelveston, Finedon, Great Harrowden, Irthlingborough, Little Harrowden, Raunds, Hargrave

See more in the NN 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 North Northamptonshire are broadly in line with the UK average.

CategoryNational cost range Adjusted for NN9 (×0.98) Net after £7,500 BUS grant
Small flats / simple installs £ 6,000 – £ 7,000 £ 5,880 – £ 6,860 from ~£ 1,000*
2–3-bed semis / moderate upgrades £ 8,000 – £ 12,000 £ 7,840 – £ 11,760 from ~£ 1,000*
Large detached / extensive work £ 13,000 – £ 18,000 £ 12,740 – £ 17,640 £ 5,240 – £ 10,140

* 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 £2,953 for a typical 3-bedroom home after the £7,500 grant.

How much can I save on heating bills?

Roughly £326 per year for the average home at current price-cap rates.

  • £814 Average Heating Cost UK avg £960
  • 75.0 m² Median Floor Area UK avg 84.7 m²
  • 4.3 Average Rooms UK avg 4.4

Local energy snapshot

Latest tariff window: 2025Q4

Ofgem region & price cap

East Midlands · 25.55p/kWh · 49.09p/day

PV potential (south-facing)

995 kWh per kWp/year

Dwelling mix

House 76.6% Flat 11.2% Bungalow 10.6% Detached 29.9% Semi-detached 39.1% Terraced 29.6%

EPC certificates

7,869 on record

Ready to get started?

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Also in Your Area: Solar Panel Potential

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

Without heat pump:

Solar saves ~£807/year
Payback: 12.6 years

With heat pump:

Solar saves ~£962/year
Payback: 10.6 years

  • Typical system 5 kW
  • Installation cost ~£10,200
  • Annual generation 4,977 kWh

See detailed solar data for NN9 →

Data from our sister site, Solar By Postcode UK

Compare nearby areas: NN6 (North Northamptonshire, West Northamptonshire, Harborough) · NN7 (Milton Keynes, North Northamptonshire, West Northamptonshire) · NN8 (North Northamptonshire) · NN10 (Bedford, North Northamptonshire) · NN11 (West Northamptonshire, Rugby, Stratford-on-Avon) · NN12 (West Northamptonshire, Buckinghamshire)

Heat Pump Installation & Ownership Guide

Timeline, planning rules, maintenance and what to expect
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Official Heat Pump Resources & Data Sources

BUS, Ofgem, planning rules, MCS and the data behind the numbers
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