Cavity wall and attic grants together
The cavity wall and attic grants are separate fixed amounts, and one application can include both. A semi-D gets €1,300 for the walls and €1,500 for the attic, €2,800 together, against typical costs of €1,585 and €2,101. The claim needs a post-works BER, with a €50 grant towards it.
Both grants by house type, what's left to pay on each, and the other grants that stack.
Free, no obligation. One registered installer prices it, not five.
- €2,800walls and attic together, semi-D
- €3,800detached
- €700heating controls grant
- €50towards the BER after the work
Both grants, by house type
| Home type | Cavity wall | Attic | Together | Left to pay, both jobs |
|---|---|---|---|---|
| Detached | €1,800 | €2,000 | €3,800 | about €1,250 |
| Semi-D or end of terrace | €1,300 | €1,500 | €2,800 | about €886 |
| Mid-terrace | €850 | €1,400 | €2,250 | about €1,200 |
| Apartment | €700 | €1,100 | €1,800 | about €751 |
On the higher rate the attic grant is €2,500, €1,900, €1,800 and €1,400, for homeowners on the qualifying payments, landlords with a HAP or RAS tenant, and first-time buyers of a second-hand home bought after 1 January 2025 that they live in.
Check your cavity wall grant
Four quick taps. You see your grant as you go, then what the job typically costs after it, the BER and your next step. Your number is only asked for at the end, if you want a price.
A semi-detached built before 2011, no earlier wall grant: a €1,300 grant, and the job typically costs €1,585, so about €285 is left to pay.
How this is worked out
SEAI pays a fixed cavity wall grant for each house type, and a higher fixed amount to homeowners on certain welfare payments and to landlords with a HAP or RAS tenant. The typical cost is the median price of cavity wall insulation for your house type across thousands of grant-funded jobs, and the post-works BER is its median price less its own grant. Your installer prices your walls after a look: it's a guide to plan with, never a quote. SEAI decides every grant.
What else stacks
- Heating controls: €700.
- The post-works BER: €50.
- A second wall measure later, if the cavity was filled with a grant before: internal or external insulation.
Each grant has the same rule: approval before that work starts.
Cavity Wall Insulation Grants guides & price breakdowns
Straight answers to what people ask most: itemised costs, specifications, planning or grants, and what to check before you book.
More guides & resources: The BER after cavity wall insulation · Had a wall grant before? The second wall measure · All guides & calculator hub · Technical & trade glossary · Frequently asked questions · All areas covered
Questions people ask
Can I get the cavity wall and attic grants together?
The cavity wall and attic grants are separate fixed amounts, and one application can include both. A semi-D gets €1,300 for the walls and €1,500 for the attic, €2,800 together, against typical costs of €1,585 and €2,101. The claim needs a post-works BER, with a €50 grant towards it.
How much is the attic grant?
€2,000 for a detached house, €1,500 for a semi-detached or end-of-terrace house, €1,400 for a mid-terrace house, €1,100 for an apartment. Higher for certain welfare recipients, HAP and RAS landlords and first-time buyers of a second-hand home.
Is there a grant for the BER?
Yes. SEAI pays €50 towards the post-works BER, done by a registered BER assessor after the work.
Does the attic have to be done at the same time?
No. Each grant needs approval before its work starts, and the work has to be finished and claimed within 8 months of the offer.
Cavity Wall Insulation Grants across all 26 counties
Requests from all 26 counties go to one vetted local specialist who covers your county — from Dublin, Cork, Galway and Limerick to Kildare, Meath, Wicklow, Waterford and Donegal. Pick your county below for local prices, specifications and advice. Compare all areas covered →
Check your cavity wall grant
Four taps to your grant and what's left to pay, then one SEAI-registered installer who covers your county rings with a price.