Our 2026 Green Home Upgrade Priority List: Where to Start and Why

The sheer number of green home upgrades available can be paralysing. Solar panels, heat pumps, batteries, EV chargers, insulation, smart controls - where do you start? Here's our recommended priority list, ranked by cost-effectiveness and practical impact.

Tier 1: Free or nearly free (do these first)

1. Switch energy tariff - Potential saving: £100-500/year. Cost: £0. Time: 15 minutes. If you haven't switched in the past year, you're almost certainly overpaying.

1. Free heating measures - Potential saving: £50-200/year. Turn down the thermostat by 1C, bleed radiators, close curtains at dusk, draught-proof doors. Zero cost, immediate effect.

1. LED lighting - Potential saving: £40-60/year. Cost: £20-50. Replacing all remaining halogen or CFL bulbs with LEDs typically pays back within months.

Tier 2: Low cost, fast payback (under £500)

1. Loft insulation top-up - Potential saving: £150-250/year. Cost: £300-500. Payback: 1-3 years. If your loft has less than 270mm of insulation, this is the highest-ROI home improvement in existence.

1. Smart heating controls - Potential saving: £130-250/year. Cost: £150-350. Payback: 1-2 years. Smart thermostat plus TRVs give you room-by-room control.

1. Draught-proofing (professional) - Potential saving: £50-100/year. Cost: £100-300. Payback: 1-3 years.

Tier 3: Medium investment, strong returns (£500-£2,000)

1. Cavity wall insulation - Potential saving: £150-300/year. Cost: £500-1,500. Payback: 2-5 years. If your home has unfilled cavities, this is essential.

1. Home EV charger - Potential saving: £100-120/month vs petrol. Cost: £800-1,200. Payback: 7-12 months. If you already have an EV or are buying one, this is a no-brainer. Our installation guide covers what to expect.

Tier 4: Significant investment, long-term value (£2,000+)

1. Solar panels - Potential saving: £800-950/year. Cost: £5,500-7,500. Payback: 7-9 years. After payback, 15-20 years of essentially free electricity.

1. Solar + battery bundle - Potential saving: £1,100-1,200/year. Cost: £10,000-13,000. Payback: 9-11 years. Better long-term returns than solar alone.

1. Heat pump (with BUS grant) - Potential saving: £200-400/year vs gas (more on heat pump tariff). Cost: £2,500-7,500 after grant. Payback: 8-15 years. Best when your boiler needs replacing anyway.

1. Double/triple glazing - Potential saving: £100-200/year. Cost: £3,000-10,000. Payback: 15-50 years. Justified for comfort and noise reduction, but rarely on financial grounds alone.

The optimal sequence

1. Do all Tier 1 items immediately
2. Get your EPC assessed to identify priority insulation needs


3. Complete Tier 2 insulation and controls


4. Install solar panels (ideally with battery) while 0% VAT applies


5. Switch to heat pump when your boiler reaches end of life


6. Add an EV charger when you go electric

Don't try to do everything at once

Pick one or two items from the appropriate tier and get them done. Then move to the next. Trying to plan the perfect whole-house retrofit often leads to doing nothing. Progress beats perfection.

Ready to start? Compare quotes for whichever upgrade makes sense for your home right now.