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Attic and walls · one table

Home insulation grants in one table

SEAI grants four insulation jobs. For a semi-D: €1,500 for the attic, €1,300 for cavity walls, €3,500 for internal and €6,000 for external wall insulation (SEAI median costs). You can combine the attic with one wall job.

Every insulation grant and its median cost, so you can see what a whole-house job leaves you to pay.

Get a free quoteCheck my grantFree. Your grant in 3 taps, then 4 questions for a price. One SEAI-registered contractor rings you.

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.

The three wall insulation jobs SEAI grants, seen from above Three walls in section, outside on the left and the room on the right. Cavity wall: two leaves of block with the gap between them filled with insulation pumped in through drilled holes. Internal insulation, or dry lining: a solid wall with insulation board, a vapour control layer and plasterboard fixed to the inside face, so the room gets a little smaller. External insulation, or the wrap: a solid wall with insulation slabs fixed to the outside, covered with mesh and render, so nothing changes inside. Seen from above. Our drawing, not to scale. Cavity wallOUTSIDEROOMGap filled throughdrilled holes Internal (dry lining)OUTSIDEROOMBoard, vapour layer,plasterboard inside External (the wrap)OUTSIDEROOMSlabs, mesh andrender outside
The three jobs SEAI grants for walls, as its Homeowner's Guide to Wall Insulation describes them (SEAI). Which one a house can have depends on how its walls were built.
  • €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.

Wall job
Your home
Which fits you?

Your SEAI wall insulation grant

€3,500

SEAI median cost, Jan to Jun 2026
€9,843
Left to pay at the median
€6,343

SEAI's fixed internal (dry lining) grant for a semi-d or end of terrace at the standard rate is €3,500 (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 €9,843. €9,843 less €3,500 leaves about €6,343. Our sum; your quote can be higher or lower.

Send this for a real price
How 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 grants

SEAI insulation grants by home type

Home typeAtticCavity wallInternal wallExternal wall
Detached house€2,000€1,800€4,500€8,000
Semi-D or end of terrace€1,500€1,300€3,500€6,000
Mid-terrace€1,400€850€2,000€3,500
Apartment€1,100€700€1,500€3,000

Standard rates (SEAI median costs, SEAI). Higher rates: attic up to €2,500 (certain welfare recipients, HAP or RAS landlords and first-time buyers), cavity up to €2,300 (Citizens Information).

The cost

Attic plus walls on a semi-D

CombinationMedian costGrantsLeft to pay
Attic + cavity€3,686€2,800€886
Attic + internal€11,944€5,000€6,944
Attic + external€25,320€7,500€17,820

SEAI's median attic cost for a semi-D is €2,101 (SEAI median costs); the sums are ours.

Why the attic

Walls and the attic together

A whole-wall job usually changes more than 25% of the home's outer surface, and then Building Regulations want a B2 BER or compliant heating and attic insulation (SEAI). atticinsulationgrant.ie has the attic grant in full.

The rules

What every insulation 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.

What type of home is it?

SEAI pays a fixed amount for each type of home.

By sending, you agree to Wall Insulation Grants passing your details to one SEAI-registered insulation contractor who covers your area, so they can contact you about the job. wallinsulationgrants.ie is not SEAI or a government body and does not award grants. Privacy notice

FAQ

Questions people ask

What insulation grants are available in Ireland?

SEAI's individual grants cover attic, cavity wall, internal wall and external wall insulation, each a fixed amount by home type (SEAI median costs).

Can I get the attic and wall grants together?

Yes. They're separate grants and can be combined; the wall grant is one of the three wall jobs.

Is there a free insulation grant?

The Warmer Homes Scheme does it for free for homeowners on certain payments, with a wait of about two years (SEAI). See free wall insulation.

Keep reading

Related guides

Where these numbers come from (6 public sources, checked 2 November 2026)
  1. SEAI, individual energy upgrades: median costs and fixed grants, January to June 2026, 23,412 upgrades (PDF)
  2. SEAI, wall insulation grant page
  3. Citizens Information, Better Energy Homes Scheme (page updated 22 October 2026)
  4. SEAI, insulation grants page
  5. SEAI, fully funded energy upgrades (Warmer Homes Scheme)
  6. SEAI BER Research Tool, full public file (downloaded 29 October 2026, our sums)