The external insulation grant for a semi-detached house
A semi-detached house gets a fixed €6,000 from SEAI for external wall insulation. The typical one has about 91 m² of outside wall, and a typical job for that wall costs about €23,200, so about €17,200 is left to pay. That's about €66 of grant for every square metre.
The grant against a semi-D's walls, by size.
Free, no obligation. One registered contractor prices it, not five.
- €6,000SEAI external insulation grant
- 91 m²outside wall, typically
- about €23,200a typical job that size
- about €17,200left to pay
The grant against the wall
| Size | Outside wall | Typical job | Left after the grant | Grant per m² |
|---|---|---|---|---|
| Smaller than most | 80 m² | about €20,400 | about €14,400 | about €75 |
| About average | 91 m² | about €23,200 | about €17,200 | about €66 |
| Bigger than most | 104 m² | about €26,500 | about €20,500 | about €58 |
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.
Three walls, one shared
A semi-D has a front, a back and a gable to wrap. The party wall with next door isn't an outside wall. The gable usually has the fewest windows, so it's the simplest wall of the job.
Doing your half on its own? Wrapping half a semi-D.
Questions people ask
How much is the external insulation grant for a semi-detached house?
€6,000, fixed. The same for an end of terrace.
How much does external insulation cost on a semi-D?
A typical job for a typical semi-D's 91 m² of outside wall costs about €23,200, so about €17,200 after the grant.
Does next door have to do theirs too?
No. Each home applies for its own grant. Doing both together shares the scaffolding and leaves no step at the party line.
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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.