Attic insulation cost in Ireland
Attic insulation costs a median of €2,519 for a detached house in Ireland, €2,000 for a semi-detached or end of terrace, €2,000 for a mid terrace and €1,894for an apartment.After the SEAI grant, a detached house typically pays about €519.
Attic insulation lays or tops up insulation at ceiling level, and is usually the cheapest meaningful upgrade a house can have.
| House type | Median cost | SEAI grant | You pay |
|---|---|---|---|
| Detached | €2,519 | −€2,000 | €519 |
| Semi-detached or end of terrace | €2,000 | −€1,500 | €500 |
| Mid terrace | €2,000 | −€1,400 | €600 |
| Apartment | €1,894 | −€1,100 | €794 |
SEAI, Better Energy Homes and Solar PV: individual energy upgrades costs and grants.47,067 energy upgrades completed through the Better Energy Homes and Solar PV Scheme, January to December 2025. Checked 2026-08-13.
What the median does not tell you
- The spread between dwelling types is small, from €1,894 to €2,519, because the job is priced on roof area and access rather than on the size of the house below it.
- First-time buyers and homeowners on qualifying welfare payments receive a higher fixed grant, up to €2,500 for a detached house, which is close to the full median cost.
Treat this as a sense-check, not a quote
A median is the mid-point. Half the homes in SEAI's sample paid less than €2,519and half paid more. What you are quoted depends on the size and condition of your home, and on what the contractor finds when they survey it. Get more than one quote.
The grant that pays towards this
The SEAI Attic Insulation grant is worth up to €2,000. Available for homes built and occupied before 2011. Minimum insulation depth requirements apply.
The grant is paid after the work is finished, and only when the work is carried out by a contractor on the SEAI register. You pay the contractor in full first.
Full detail on the Attic Insulation grant →See what your own home qualifies for
Answer a few questions about the house and get the grant total for this upgrade and every other one it is eligible for. We email you the contractor contacts to approach yourself, and we do not share your details with them.
Attic insulation contractors by county
918 SEAI-registered contractorsacross 26 counties do this work, and the grant is only paid when the work is done by one of them. A business covering several counties appears in each of them.
Common questions
How much does attic insulation cost in Ireland?
The median cost is €2,519 for a detached house, €2,000 for a semi-detached or end of terrace house, €2,000 for a mid terrace and €1,894 for an apartment. These are SEAI's published medians for January to December 2025.
What does attic insulation cost after the SEAI grant?
A detached house at the median pays €2,519 and can claim €2,000, leaving about €519. The grant is paid to you after the work is completed by an SEAI-registered contractor, so you pay the full amount up front.
Is this the price I will be quoted?
No. A median is the mid-point: half of the upgrades in SEAI's sample cost less than €2,519 and half cost more. Your quote depends on the size and condition of your home and on what the contractor finds when they survey it. Use the median to sense-check a quote, not to predict it.
Who can carry out attic insulation under the grant?
Only a contractor on the SEAI register. Qualified.ie lists 918 registered contractors who do this work, across 26 counties.