The cavity wall grant for a mid-terrace house
A mid-terrace house gets €850 from SEAI for cavity wall insulation, or €1,100 on the higher rate. The job typically costs €1,250, so about €400 is left to pay, or about €150 on the higher rate. Every outside wall has to be insulated, and the home must have been built and first lived in before 2011.
The grant, the cost, and the solid-wall question on older terraces.
Free, no obligation. One registered installer prices it, not five.
- €850SEAI cavity wall grant
- €1,100the higher rate
- €1,250typical cost of the job
- about €400left to pay at the standard rate
The grant for this home
| Standard rate | Higher rate* | |
|---|---|---|
| Cavity wall grant | €850 | €1,100 |
| Typical cost | €1,250 | €1,250 |
| Left to pay | about €400 | about €150 |
| Post-works BER, after its €50 grant | about €225 | about €225 |
* For homeowners on Fuel Allowance, Working Family Payment, One-Parent Family Payment, Domiciliary Care Allowance or Carer's Allowance (living with the person you care for), or Jobseeker's Allowance or Disability Allowance for over 6 months with a child under 7, and for landlords with a HAP or RAS tenant.
Two outside walls
A mid-terrace house has houses on both sides, so only the front and back walls are outside walls. That's why its grant is the smallest of the houses, €850, and why the job is smaller too, typically €1,250. 20% of households in Ireland live in a terraced house (Census 2022).
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 mid-terrace built before 2011, no earlier wall grant: a €850 grant, and the job typically costs €1,250, so about €400 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.
Older terraces
Many older terraces were built with solid walls, not cavity walls, and a cavity grant needs a cavity. Homes built before 1940 may need a conservation professional's advice before any insulation, because modern methods may not suit them. Internal or external insulation have their own grants: wall grants after a first one lists them.
Add the attic
The attic grant for a mid-terrace is €1,400, or €1,800 on the higher rate, against a typical €2,200. Both together.
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 for a terraced house?
€850 for a mid-terrace, or €1,100 on the higher rate. An end of terrace gets the semi-detached amount, €1,300.
What does it cost to insulate a mid-terrace cavity?
Typically €1,250, so about €400 after the grant.
My terrace has solid walls. Can I get the grant?
Not the cavity grant. Solid walls have no cavity to fill; internal and external wall insulation have their own grants.
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.