External insulation after the grant, by house size
After the grant, a typical semi-D's external insulation leaves about €17,200 to pay, a mid-terrace about €10,500 and a detached house about €18,500. A smaller house of the same type pays less, a bigger one more, because the grant is fixed and the wall isn't.
Our price guide: the typical job and what's left, for smaller, average and bigger houses of each type.
Free, no obligation. One registered contractor prices it, not five.
- about €17,200left on a typical semi-D
- about €10,500on a typical mid-terrace
- about €18,500on a typical detached house
- €110–€160per m² for the insulation and render
Our price guide: left to pay after the grant
| House (smaller · average · bigger wall) | Left to pay: smaller · average · bigger | What moves it |
|---|---|---|
| Detached (96 · 128 · 169 m²) | about €12,000 · €18,500 · €27,100 | €8,000 grant; wall area and finish |
| Semi-detached (80 · 91 · 104 m²) | about €14,400 · €17,200 · €20,500 | €6,000 grant; wall area and finish |
| End of terrace (76 · 85 · 100 m²) | about €14,600 · €17,200 · €21,200 | €6,000 grant; wall area and finish |
| Mid-terrace (39 · 48 · 65 m²) | about €7,700 · €10,500 · €15,300 | €3,500 grant; wall area and finish |
| Apartment (29 · 43 · 58 m²) | about €4,800 · €8,300 · €12,300 | €3,000 grant; few apartment jobs so far, so rough |
Typical whole jobs, after the fixed SEAI grant. Your contractor prices your house after a look.
What's included
- Insulation boards fixed to every outside wall
- Mesh, base coat and the render finish
- New sills, and reveals around windows and doors
- Downpipes, vents and fittings moved out
- Scaffolding
What pushes it up or down
- The system itself typically runs €110 to €160 per m²
- Brick slip or stone finishes cost more than render
- Extensions, porches and bay windows add wall and detail
- Soffits that need extending
- Doing both halves of a semi-D together shares the scaffolding
Your grant against your walls
Four quick taps. You see your grant, your wall, what a job that size typically costs and what's left. Your number is only asked for at the end, if you want a price.
An average semi-detached house: about 91 m² of outside wall, a typical job of about €23,200, the €6,000 grant, so about €17,200 left to pay.
How this is worked out
The grant is SEAI's fixed amount for your house type. The wall area is the median outside wall on the BER register for homes of your type built before 2011, or the smaller or larger quarter if you picked those. The typical job is what grant-funded external insulation typically costs for your house type, scaled to that wall. Your contractor prices your house after a look: it's a guide to plan with, never a quote. SEAI decides every grant.
Before the grant
| House | Smaller | Average | Bigger |
|---|---|---|---|
| Detached | about €20,000 | about €26,500 | about €35,100 |
| Semi-detached | about €20,400 | about €23,200 | about €26,500 |
| End of terrace | about €20,600 | about €23,200 | about €27,200 |
| Mid-terrace | about €11,200 | about €14,000 | about €18,800 |
| Apartment | about €7,800 | about €11,300 | about €15,300 |
What grant-funded external insulation typically costs for the house type, scaled to the wall.
Questions people ask
How much does external insulation cost after the grant?
After the grant, a typical semi-D's external insulation leaves about €17,200 to pay, a mid-terrace about €10,500 and a detached house about €18,500. A smaller house of the same type pays less, a bigger one more, because the grant is fixed and the wall isn't.
What's the price per square metre?
The insulation and render system typically runs €110 to €160 per m². Scaffolding, sills, reveals and fittings add to that, which is why whole jobs work out higher per m².
Why does a bigger house pay more if the grant is the same?
The grant is fixed by house type. More wall means more boards, render and labour, all paid by you once the grant is used up.
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Your grant against your walls
Four taps to your grant, your wall and what's left. Then, if you want, one SEAI-registered external insulation contractor who covers your county rings with a price.