EPC Improvement Checker
See which home improvements will boost your EPC rating. Compare the cost versus increase in property value.
EPC Improvement Checker
Current EPC Rating
39
out of 100
Potential New Rating
100
+90 points
Total Investment
£29,600
Annual saving: £1,850
Payback: 16.0 years
Recommended Improvements (by Cost-Effectiveness)
Loft Insulation to 270mm
+15 EPC pointsUpgrade loft insulation from 0mm to 270mm
Cost
£500
Annual Saving
£150
Payback
3.3 yrs
ROI
30%
Upgrade to Smart Heating Controls
+5 EPC pointsInstall smart thermostat and TRVs for precise heating control
Cost
£400
Annual Saving
£80
Payback
5.0 yrs
ROI
20%
Cavity Wall Insulation
+12 EPC pointsFill cavity walls with insulation (one-time, permanent)
Cost
£1,200
Annual Saving
£120
Payback
10.0 yrs
ROI
10%
Replace Old Boiler with High-Efficiency
+8 EPC pointsInstall new condensing boiler (90%+ efficiency)
Cost
£2,500
Annual Saving
£200
Payback
12.5 yrs
ROI
8%
Install 5kW Solar Panel System
+15 EPC pointsInstall solar PV system with battery storage potential
Cost
£10,000
Annual Saving
£600
Payback
16.7 yrs
ROI
6%
Install Air Source Heat Pump
+25 EPC pointsReplace boiler with heat pump (requires grants consideration)
Cost
£10,000
Annual Saving
£500
Payback
20.0 yrs
ROI
5%
Modern Double/Triple Glazing
+10 EPC pointsReplace single glazing with high-performance windows
Cost
£5,000
Annual Saving
£200
Payback
25.0 yrs
ROI
4%
Quick Wins (under £500)
- ✓Upgrade to Smart Heating Controls (5.0 yr payback)
Medium (£500-5000)
- ▪Loft Insulation to 270mm (3.3 yr payback)
- ▪Cavity Wall Insulation (10.0 yr payback)
- ▪Replace Old Boiler with High-Efficiency (12.5 yr payback)
Major (£5000+)
- ●Install 5kW Solar Panel System (16.7 yr payback)
- ●Install Air Source Heat Pump (20.0 yr payback)
- ●Modern Double/Triple Glazing (25.0 yr payback)
💰 Grants & Support Available
BUS Grant (Boiler Upgrade Scheme)
£7,500 towards heat pump installation. Check eligibility on gov.uk
Local Authority Grants
Many councils offer insulation and heating grants. Contact your local authority
Energy Company Obligation (ECO)
Some energy suppliers offer free/discounted insulation. Ask your provider
Tax Relief
Energy-efficient improvements may qualify for 5% VAT rate instead of 20%
💡 Improvement Strategy
- Start with loft insulation: Fastest payback, biggest impact
- Add cavity wall insulation: Permanent benefit, no disruption
- Upgrade windows: Improves comfort and appearance too
- Replace old boiler: Consider heat pump for green credentials
- Invest in controls: Smart controls save money with less investment
- Add solar later: Combine with other upgrades for best savings
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