Energy rating CtoEnergy rating B: detached, 1981–1990
15,955 homes of this kind are rated C. Bringing one up to a B costs about €19,000, of which the grants cover €12,500 — so you pay €4,500 – €8,900.
Check your own home
Your cert may say B2 — that's a B on the new scale.
A heat pump runs on electricity. Pick "Heat pump" if you have one.
A 1970s–80s detached house on oil, rated CEnergy rating C
- Grants you’d get
- €10,300
- It costs about
- €19,000
- You pay
- €5,000 – €8,900
- Saves you each year
- about €760
- Pays for itself in
- about 15 years
The commonest home on file — 24,045 like it. Change an answer above for yours.
Modelled, not observed payments. Middle case €8,930; a quarter of these homes are over €13,884. Repaid in 15.1–16.7 years. Confidence 0.9.
Show what’s included
This is the job list that suits most homes like yours (2 in 10). The money above is the middle of every route we priced, so it will not add up to this list exactly.
Solar panels — on the roof, one day, no disruption. Cuts the electricity bill, and pairs well with a heat pump.
2.4 kWp ≈ 2,040 kWh/yr. Cost €9,400 · grant up to €1,800 · you pay €7,600.
Costs about €10,700 · grant €1,800 · you pay €8,900
The paperwork — assessment first, grant approval, then the work, then a new energy cert, then the grant is paid. A One-Stop-Shop does all of it and takes the grant off the bill.
Order is mandatory — work started before approval is not eligible. Energy cert €276, assessment grant €350 through a One-Stop-Shop. Typically 3–6 months end to end (estimate).
Costs about €280 · grant €350 · the grant covers it
The numbers
As-is 188.58 → target 114.85 kWh/m²/yr primary energy. Wall U 0.54 → 0.38, roof 0.24 → 0.21, window 2.7 → 2.14 W/m²K. Heat pump share 0% → 16%. Middle case €8,930; a quarter of these homes are over €13,430. Repaid in 13.8–16.5 years. n=15,955, confidence 0.9.
Target: B = ≤150 kWh/m²/yr on the scale in force since 24 May 2026. Records folded into C: C1, C2, C3 on the pre-24-May-2026 scale. The C band's edges did not move, so every one of these homes would still be shown a C on a certificate issued today. Stricter B2-equivalent target (≤125 kWh/m²/yr): you pay €9,019, repaid in 11.9 years.
What the work is
Solar panels — on the roof, one day, no disruption. Cuts the electricity bill, and pairs well with a heat pump.
2.4 kWp ≈ 2,040 kWh/yr. Cost €9,400 · grant up to €1,800 · you pay €7,600.
Costs about €10,700 · grant €1,800 · you pay €8,900
It saves about €770 a year and pays for itself in about 14 years.