Wrapping half a semi-D
Each half of a semi-D is its own home with its own MPRN, so each applies for its own €6,000 grant. You can wrap your half alone. Done alone, your front wall stands out from next door's by the thickness of the insulation and render, so the edge at the boundary needs a neat finish. Done together, the two halves share the scaffolding and look like one house.
Your grant, next door's grant, and how the two halves meet.
Free, no obligation. One registered contractor prices it, not five.
- €6,000grant for each half
- 2applications, one per home
- 1scaffold, if you go together
- Optionalnext door joining in
Alone or together
| Your half alone | Both halves together | |
|---|---|---|
| Grants | €6,000 | €6,000 each |
| Scaffolding | Yours to pay | Shared |
| The front | A step at the boundary | One even face |
| Colour | Your choice | Agreed between you |
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.
If you go alone
- The insulation stops at the line between the houses, with a neat edge.
- Gutters and downpipes on the shared line need a word with next door.
- Check the front-wall rules: planning for external insulation.
Questions people ask
Can I put external insulation on half a semi-detached house?
Each half of a semi-D is its own home with its own MPRN, so each applies for its own €6,000 grant. You can wrap your half alone. Done alone, your front wall stands out from next door's by the thickness of the insulation and render, so the edge at the boundary needs a neat finish. Done together, the two halves share the scaffolding and look like one house.
Does next door get a grant too?
Yes, if their home qualifies: €6,000, on their own application.
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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.