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Home energy upgrades: costs, savings and EPC impact
One page for each common upgrade, with honest, indicative UK ranges, what to check and who each one suits.
IndicativeFigures on this page are indicative ranges for a typical UK home. They are not a quote, a survey or an EPC. Your home will differ.
InsulationLoft Insulation£500 to £1,000 · +2 to +10 EPC ptsInsulationRoof and Room-in-Roof Insulation£1,500 to £6,000 · +3 to +10 EPC ptsInsulationCavity Wall Insulation£1,000 to £2,500 · +3 to +9 EPC ptsQuick winDraught-Proofing£150 to £500 · +0 to +2 EPC ptsWindowsDouble and Triple Glazing£3,500 to £8,000 · +1 to +5 EPC ptsDoorsEnergy-Efficient Front and Back Doors£900 to £2,500 · +0 to +2 EPC ptsRooflineRoofline: Fascias, Soffits and Guttering£2,000 to £5,000 · none on its own EPC ptsGenerationSolar Panels (Solar PV)£5,500 to £9,000 · +4 to +12 EPC ptsHeatingAir Source Heat Pump£8,000 to £14,000 · +5 to +15 EPC ptsHeatingSmart Thermostats and Heating Controls£150 to £700 · +0 to +3 EPC ptsQuick winLED Lighting£50 to £300 · +0 to +2 EPC pts
Cost anchors come from the Energy Saving Trust’s Retrofit explained averages for a typical semi-detached home, widened into ranges. New to EPCs? Read how EPC ratings work and how to improve your EPC rating.
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