The cavity wall grant across all 26 counties
SEAI pays a fixed cavity wall insulation grant: €1,800 for a detached house, €1,300 for a semi-detached or end-of-terrace house, €850 for a mid-terrace house, €700 for an apartment. Homeowners on certain welfare payments, and landlords with a HAP or RAS tenant, get the higher rate: €2,300, €1,700, €1,100 and €900.
The SEAI grant amounts are the same nationwide, while the age of housing, wall types and heating degree days vary county by county.
Free, no obligation. One registered installer prices it, not five.
- 26counties covered
- 92%of Irish homes built before 2011
- 32.8%rated homes with empty or part-filled cavity
- €1,800detached house grant
Every county compared
Share of households in homes built before 2011 and detached share from Census 2022, empty or part-filled cavities from the SEAI BER register, and annual heating degree days from Met Éireann (1991 to 2020).
| County | Built before 2011 | Detached share | Empty or part-filled cavity | Heating degree days |
|---|---|---|---|---|
| Carlow | 92% | 51% | 38.1% | 1,969 |
| Cavan | 93% | 67% | 38.6% | 2,159 |
| Clare | 94% | 60% | 42.4% | 1,843 |
| Cork | 92% | 44% | 37.0% | 1,755 |
| Donegal | 94% | 70% | 48.4% | 2,211 |
| Dublin | 92% | 10% | 22.6% | 1,825 |
| Galway | 93% | 59% | 48.6% | 1,860 |
| Kerry | 94% | 66% | 42.5% | 1,673 |
| Kildare | 87% | 38% | 25.1% | 2,093 |
| Kilkenny | 93% | 59% | 32.7% | 1,961 |
| Laois | 91% | 55% | 41.7% | 2,080 |
| Leitrim | 95% | 73% | 32.5% | 2,102 |
| Limerick | 94% | 45% | 38.5% | 1,837 |
| Longford | 94% | 63% | 36.5% | 2,094 |
| Louth | 91% | 39% | 34.6% | 1,951 |
| Mayo | 93% | 70% | 46.4% | 2,028 |
| Meath | 87% | 50% | 28.7% | 2,048 |
| Monaghan | 92% | 65% | 34.3% | 2,182 |
| Offaly | 94% | 58% | 35.7% | 2,046 |
| Roscommon | 94% | 74% | 40.2% | 2,088 |
| Sligo | 94% | 56% | 32.9% | 2,032 |
| Tipperary | 95% | 59% | 33.8% | 1,959 |
| Waterford | 93% | 42% | 34.8% | 1,781 |
| Westmeath | 94% | 53% | 31.6% | 2,162 |
| Wexford | 92% | 61% | 41.7% | 1,844 |
| Wicklow | 90% | 44% | 24.1% | 1,883 |
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.
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
How much is the cavity wall grant in every county?
SEAI pays a fixed cavity wall insulation grant: €1,800 for a detached house, €1,300 for a semi-detached or end-of-terrace house, €850 for a mid-terrace house, €700 for an apartment. Homeowners on certain welfare payments, and landlords with a HAP or RAS tenant, get the higher rate: €2,300, €1,700, €1,100 and €900.
Do you cover all 26 counties?
Yes. Requests go to one SEAI-registered installer who covers your county.
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.