The external insulation grant for a detached house
A detached house gets a fixed €8,000 from SEAI for external wall insulation. The typical one has about 128 m² of outside wall, and a typical job for that wall costs about €26,500, so about €18,500 is left to pay. That's about €63 of grant for every square metre.
Four walls, the biggest grant, and the most to pay.
Free, no obligation. One registered contractor prices it, not five.
- €8,000SEAI external insulation grant
- 128 m²outside wall, typically
- about €26,500a typical job that size
- about €18,500left to pay
The grant against the wall
| Size | Outside wall | Typical job | Left after the grant | Grant per m² |
|---|---|---|---|---|
| Smaller than most | 96 m² | about €20,000 | about €12,000 | about €83 |
| About average | 128 m² | about €26,500 | about €18,500 | about €63 |
| Bigger than most | 169 m² | about €35,100 | about €27,100 | about €47 |
The wall areas are from the BER register for homes of this type built before 2011. The typical job is what grant-funded external insulation typically costs, scaled to the wall.
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.
The most wall, the biggest grant
A detached house has four outside walls, about 128 m² on a typical one and over 169 m² on a quarter of them. The grant is the biggest, €8,000, but it covers less of each square metre than on a semi-D, because there's so much more wall.
Bungalows are detached houses to SEAI: the bungalow page.
Questions people ask
How much is the external insulation grant for a detached house?
€8,000.
How much does external insulation cost on a detached house?
A typical job for a typical detached house's 128 m² of outside wall costs about €26,500, so about €18,500 after the grant.
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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.