Reference table · checked November 2026
SEAI wall insulation grant amounts 2026
Cavity wall insulation: €1,800, €1,300, €850 and €700 for a detached, semi-D, mid-terrace and apartment. Internal: €4,500 to €1,500. External: €8,000 to €3,000 (SEAI).
One table for every wall grant and rate, the older amounts still shown on one SEAI page, and the dates. Cite it freely.
Figures checked against SEAI and Citizens Information on 2 November 2026. wallinsulationgrants.ie is not SEAI or a government body and does not award grants.
- €8,000SEAI's fixed external wall grant for a detached house, the biggest of the three
- €4,500for internal wall insulation (dry lining) on a detached house (SEAI)
- €2,300the higher cavity grant for a detached house, for certain welfare recipients and HAP or RAS landlords (Citizens Information)
- 24%of homes on the BER register with a known wall type have solid or hollow block walls: no cavity to fill (SEAI BER register)
FreeNo obligationOne contractor rings you, not fiveSEAI approves the grant before any work
Grant check
Your wall grant and what's left to pay
Three taps: the wall job, your home, and which rate fits you. The answer is SEAI's fixed grant and its own median cost for the job.
Your SEAI wall insulation grant
€1,300
- SEAI median cost, Jan to Jun 2026
- €1,585
- Left to pay at the median
- €285
SEAI's fixed cavity wall grant for a semi-d or end of terrace at the standard rate is €1,300 (Citizens Information and SEAI, 2 November 2026). SEAI's median cost for that job on a semi-d or end of terrace, January to June 2026, was €1,585. €1,585 less €1,300 leaves about €285. Our sum; your quote can be higher or lower.
Send this for a real priceHow this is worked out
The grant is SEAI's fixed amount for that wall job and home type, as SEAI's wall insulation page and Citizens Information (Citizens Information, updated 22 October 2026) list it. The higher rate applies to cavity walls only. The median cost is SEAI's own figure from grant-funded jobs completed between January and June 2026 (SEAI median costs); the PDF doesn't say whether VAT is in. Left to pay is the median less the grant, our sum. The home must have been built and lived in before 2011, every external wall must be done, the contractor must be on SEAI's register, and SEAI must approve the grant before work starts. It's an estimate, never a quote.
The table
Wall insulation grants by home type and rate
| Home type | Cavity wall | Cavity, higher rate* | Internal (dry lining) | External (wrap) |
|---|---|---|---|---|
| Detached house | €1,800 | €2,300 | €4,500 | €8,000 |
| Semi-D or end of terrace | €1,300 | €1,700 | €3,500 | €6,000 |
| Mid-terrace | €850 | €1,100 | €2,000 | €3,500 |
| Apartment | €700 | €900 | €1,500 | €3,000 |
* Homeowners on certain welfare payments, and landlords with a tenant on HAP or RAS. There is no higher rate for internal or external insulation, and no first-time buyer rate for walls. Sources: SEAI, Citizens Information (page updated 22 October 2026) and SEAI median costs.
Who gets the higher rate
The higher cavity grant
Citizens Information lists the higher cavity rate for:
- Homeowners getting Fuel Allowance, Working Family Payment, Domiciliary Care Allowance, One-Parent Family Payment, or Carer's Allowance (if you live with the person you care for).
- Jobseeker's Allowance or Disability Allowance, if paid for over 6 months and there's a child under 7.
- Landlords renting to a tenant on HAP or RAS, with evidence of the tenancy.
The same payments open the free Warmer Homes Scheme, which can do the walls at no cost but has a long wait. First-time buyers get a higher attic grant, not a higher wall grant.
Two SEAI pages
Why you may see a lower cavity figure
| Home type | Older figure | Now | Change |
|---|---|---|---|
| Detached house | €1,700 | €1,800 | +€100 |
| Semi-D or end of terrace | €1,200 | €1,300 | +€100 |
| Mid-terrace | €800 | €850 | +€50 |
| Apartment | €700 | €700 | +€0 |
On 2 November 2026 SEAI's general insulation grants page still listed the older cavity amounts (seai.ie). SEAI's own wall insulation page says the cavity amounts went up on 3 February, and that open applications get the increase automatically. Its 2026 median costs table (SEAI median costs) and Citizens Information both show the new figures. The internal and external amounts are the same on every page. SEAI confirms your exact grant in the offer it sends before work starts.
What changed
2026 by date
- 3 FebruaryCavity wall grants go up, to €1,800 for a detached house (SEAI).
- 2 MarchA higher cavity grant starts for homeowners on qualifying welfare payments (SEAI).
- 6 October 2026The scheme is expanded; Citizens Information lists the higher cavity rate for landlords with HAP or RAS tenants too.
- 22 October 2026Citizens Information updates its Better Energy Homes page with the current table.
SEAI's page gives the February and March changes without a year; its January to June 2026 median costs table already uses the new cavity amounts.
The rules
What every wall grant needs
- The home was built and lived in before 2011: SEAI goes by the date the electricity meter was installed (seai.ie). It needs an 11-digit MPRN.
- Every external wall is insulated. SEAI does not grant part of a house.
- One wall grant per home. A property that already had wall insulation through any government scheme can't get more for walls (seai.ie).
- The contractor is on SEAI's register for that type of work, and SEAI approves the grant before materials are bought or work starts (Citizens Information).
- A BER assessor rates the home after the work; SEAI adds €50 towards that BER.
- If the work changes more than 25% of the home's outer surface, Building Regulations want the home to reach a B2 BER, or to have compliant heating and attic insulation (SEAI).
Your grant
Your wall grant and a price, in 4 taps
Tap your home, which wall job you think it needs, when it was built and which rate fits you. Then leave your number and one SEAI-registered insulation contractor who covers your area rings you to look at the walls and price it in writing.
FAQ
Questions people ask
How much is the cavity wall insulation grant in 2026?
€1,800 detached, €1,300 semi-D or end of terrace, €850 mid-terrace, €700 apartment; €2,300, €1,700, €1,100 and €900 at the higher rate (Citizens Information).
How much is the internal wall insulation grant?
€4,500 detached, €3,500 semi-D, €2,000 mid-terrace, €1,500 apartment (SEAI).
How much is the external wall insulation grant?
€8,000 detached, €6,000 semi-D, €3,500 mid-terrace, €3,000 apartment (SEAI). housewrap.ie covers the external job in detail.
Can I get two wall grants?
No. SEAI funds wall insulation once per property; a home that already had a wall grant can't get another (seai.ie).
Keep reading
Related guides
- Wall insulation cost after the grantSEAI's median cost for each wall job, before and after the grant.
- How to applySeven steps, the deadlines, and the rule that loses people the grant.
- Free wall insulationThe Warmer Homes Scheme: who gets walls done for nothing, and the wait.
- All home insulation grantsAttic and all three wall grants in one table.
- Which wall insulation does my house need?Cavity, solid, hollow block or timber frame: which grant fits.
- Internal wall insulation (dry lining)Dry lining: the grant, the cost, the room you lose and the rules.
Where these numbers come from (5 public sources, checked 2 November 2026)
- SEAI, wall insulation grant page
- Citizens Information, Better Energy Homes Scheme (page updated 22 October 2026)
- SEAI, individual energy upgrades: median costs and fixed grants, January to June 2026, 23,412 upgrades (PDF)
- SEAI, insulation grants page
- SEAI BER Research Tool, full public file (downloaded 29 October 2026, our sums)