Free Tool

Home Insulation Savings Calculator UK

Find out exactly how much you could save — and whether you qualify for free insulation through ECO4.

🏠 Property type Different property types lose heat at different rates.
📅 Property age Older homes are less well insulated and save more from improvements.
💷 Annual heating bill Your gas or heating oil bill — not electricity. Check last year's bills.
£500 £4,000 £1,200/yr
🔍 What insulation do you already have? Tick everything that's already installed. We'll only recommend what you're missing.
🏛️ Benefits received ECO4 can fund free insulation for households on qualifying benefits.

Your recommended insulation measures

Your estimated results

Annual saving
£516
on heating bills
Install cost
£1,450
typical installed
Payback period
2.8 yrs
fastest ROI
Carbon saving
1.2t
CO₂ per year
EPC improvement
Installing all recommended measures could improve your EPC by 1–2 bands

The two cheapest measures above — a cylinder jacket and draught-proofing — sit in a six-step order in our energy efficiency bundle. The first two steps cost nothing and work with the heating system you already have, so do those before you get insulation quotes.

Savings estimates based on Energy Saving Trust typical figures adjusted for property type and age. Actual savings depend on existing insulation, construction type, heating system and usage patterns. Costs are typical installed prices — get quotes for your specific property. ECO4 eligibility subject to assessment. Estimates only.

📅 Updated June 2026 · Energy Saving Trust guidance →