How much is the SEAI attic insulation grant?

The attic insulation grant varies by dwelling type and applicant category — higher amounts are available for certain groups. Verify current amounts on SEAI.ie before applying. For individual grants, you typically pay your contractor and then claim the grant (paid to the applicant or, in some cases, the contractor once paperwork is approved).

What does attic insulation cost in Ireland?

Attic insulation in Ireland typically costs €800–€2,000 for a standard home, depending on attic size and access. The SEAI grant varies by dwelling type — verify current amounts at SEAI.ie. The grant cannot exceed the actual invoice amount. Always get 3 quotes from SEAI-registered contractors.

Does my attic need to be empty to get the grant?

No — your attic does not need to be empty, but it must not be in active use as a habitable room (attic conversion). The contractor will lay mineral wool or loose-fill insulation over the joists. Some clearance around water tanks and electrical fittings is required. A SEAI-registered contractor will advise on any preparation needed.

SEAI 2025/26 Rate — Better Energy Homes

Attic Insulation Grant Ireland: Your SEAI Grant Guide

Attic insulation is one of the most cost-effective home energy upgrades in Ireland, and the SEAI grant often covers a significant portion or all of the cost. Grant amounts vary by dwelling type and applicant category — verify current rates on SEAI.ie. This guide covers who qualifies, typical costs, how to apply correctly, and the mistakes that disqualify homeowners.

Check If My Home Qualifies

How Much Is the Attic Insulation Grant?

The SEAI attic insulation grant varies by dwelling type and applicant category — higher amounts are available for certain groups. The grant is one of the highest-value relative to the cost of the work — in many cases covering the full cost:

Varies

Better Energy Homes grant

Depends on dwelling type and applicant category — verify at SEAI.ie

Can also claim

Cavity wall, heat pump, solar on same application

Grants stack — apply for multiple measures together

Attic conversion note: If your attic is converted to a habitable room (bedroom, office), standard attic insulation grants do not apply. You may instead qualify for roof or rafter insulation as part of an OSS package.

Who Qualifies for the Attic Insulation Grant?

Attic insulation has the broadest eligibility of any SEAI grant. Most older Irish homes qualify:

Owner-occupied home

You must own and live in the property as your primary residence. Landlords are not eligible for Better Energy Homes grants.

Home built before 2011

The property must have been built and occupied before 31 December 2010. Attic insulation grants also apply to homes that have had some upgrades — as long as the attic has not previously received an SEAI grant.

Accessible, unconverted attic

The attic must not be a habitable room (converted attic/loft). It must be accessible to install insulation between the joists.

SEAI-registered insulation contractor

Work must be done by a contractor registered with SEAI for attic insulation. This is specific — a general builder is not sufficient.

No prior attic insulation grant for this home

If a previous owner received the attic insulation grant, you cannot apply again for the same measure at the same property.

What the Process Looks Like

Attic insulation is one of the quicker grant applications to complete. Most homeowners can go from application to finished work in 4–8 weeks:

Get 3 quotes from SEAI-registered contractors

Search the SEAI contractor register for attic insulation installers in your area. Quotes are typically free and take a few days.

Apply for grant approval at hes.seai.ie

Create an account and apply online. You will need your MPRN number, property details, and details of the work planned. Do this BEFORE any work starts.

Receive written approval

SEAI processes applications within a few weeks. Work cannot start until you have written approval. Keep this letter — the start date matters.

Installation is completed

Attic insulation typically takes half a day to a full day. Your contractor lays mineral wool or blown-in insulation to the required depth.

Grant is processed

For individual grants, you typically pay your contractor and then claim the grant (paid to the applicant or, in some cases, the contractor once paperwork is approved). For One Stop Shop projects, the grant is deducted upfront by the provider.

Common Mistakes With Attic Insulation Grants

Letting a contractor "do the grant themselves" before you apply

Some contractors offer to handle the "paperwork" and present you with a discounted invoice. If they are applying after the work is done, you are not eligible. Always apply first yourself at hes.seai.ie.

Using a non-registered contractor

Many insulation companies are not on the SEAI register. Check the SEAI website before signing anything — an unregistered contractor means no grant.

Installing before approval

Even a few days of work before the written approval date disqualifies you permanently for this measure.

Not claiming alongside other measures

If you're also insulating walls or installing a heat pump, apply for all measures together. There's no benefit to applying separately, and combining saves admin.

Realistic Costs vs Grant Amount

Attic insulation is often the most cost-efficient upgrade available — the grant frequently covers the full cost of smaller homes:

Scenario	Typical Cost	Grant	You Pay
Small terraced house	€600–€900	Varies — see SEAI.ie	Varies*
3-bed semi-detached	€800–€1,200	Varies — see SEAI.ie	Varies*
Large detached house	€1,200–€2,000	Varies — see SEAI.ie	Varies

*Attic insulation grant varies by dwelling type and applicant category (higher amounts available for certain groups). Verify current amounts on SEAI.ie. The grant cannot exceed the actual invoice amount. Always get at least 3 quotes from SEAI-registered contractors before committing.

Use the HomeUpgrade Grant Navigator to See What Applies to Your Home

Answer 5 questions about your home and get a personalised breakdown of every grant you may qualify for — including attic insulation, wall insulation, heat pumps, and more.

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Related Grant Guides

All SEAI Grants →Heat Pump Grant →BER Assessment Grant →One Stop Shop Retrofit →