9 home types
Running costs by home
Pick the home closest to yours for a full breakdown.
1-bed flatHeat pump from £285 a year · gas £587
2-bed flatHeat pump from £357 a year · gas £706
2-bed terraced houseHeat pump from £428 a year · gas £826
3-bed terraced houseHeat pump from £499 a year · gas £945
3-bed semi-detached houseHeat pump from £547 a year · gas £1,025
3-bed detached houseHeat pump from £666 a year · gas £1,224
4-bed detached houseHeat pump from £808 a year · gas £1,463
5-bed detached houseHeat pump from £1,046 a year · gas £1,862
2-bed bungalowHeat pump from £476 a year · gas £905
Based on typical gas use for each home type. If you know your own yearly gas use, put it into the calculator for a better estimate.
Run your heat pump on cheaper electricity
Cosy Octopus has three cheap windows a day, priced 51% below its day rate. Switch through our referral link and you also get £50 credit.
Get an Octopus Quote + £50 Credit →You need a heat pump and a smart meter. Link checked 5 October 2026.