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The cavity wall grant for landlords

Landlords can apply for the cavity wall grant on a let home: €1,800 for a detached house, €1,300 for a semi-detached or end-of-terrace house, €850 for a mid-terrace house, €700 for an apartment. With a tenant on HAP or RAS, the landlord gets the higher rate: €2,300, €1,700, €1,100 and €900. SEAI may ask for proof of the tenancy.

The standard grant, the HAP and RAS higher rate, the proof SEAI asks for, and the landlord deduction.

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  • €1,700semi-D grant with a HAP or RAS tenant
  • €1,300the standard semi-D grant
  • €10,000the most a landlord can deduct, per property
  • 3properties the deduction covers
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The rates

Home typeCavity wall grantHigher rate*Typical costLeft to pay
Detached€1,800€2,300€2,350about €550
Semi-D or end of terrace€1,300€1,700€1,585about €285
Mid-terrace€850€1,100€1,250about €400
Apartment€700€900€1,036about €336

* 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.

HAP and RAS

A let home with an active HAP (Housing Assistance Payment) tenancy or a RAS (Rental Accommodation Scheme) arrangement gets the higher cavity wall grant, raised for landlords on 6 October 2026. Keep the evidence of the tenancy: SEAI may ask for it, and applications may be audited.

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 semi-detached built before 2011, no earlier wall grant, let to a HAP or RAS tenant: a €1,700 grant, and the job typically costs €1,585, so the grant covers the job.

Step 1 of 6

What kind of home is it?

SEAI sets a fixed grant for each house type.

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.

The landlord deduction

Landlords can also deduct the cost of energy upgrades from rental income: the lesser of €10,000 or the actual cost, net of the SEAI grant, for up to three properties, for work done from 2026 to 2028. Ask your accountant how it applies to you.

Your tenant

The installer needs to get round every outside wall, so agree the day with your tenant. The grant rules are the same as for any home: built and first lived in before 2011, no earlier wall grant on the MPRN, and approval before any work starts.

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.

Cost & Pricing GuideWhat cavity wall insulation costs after the grantCavity wall insulation after the SEAI grant: about €285 on a semi-D, €550 detached, €400 mid-terrace. The BER and higher rate too.Read the guide →Grants & RegulationsWho qualifies for the cavity wall grantWho qualifies for the SEAI cavity wall grant: built and first lived in before 2011, an MPRN, no earlier wall grant, every wall done, approval first.Read the guide →Grants & RegulationsHow to apply for the cavity wall grantHow to apply for the SEAI cavity wall grant: online in minutes, accept within 30 days, work and BER within 8 months, paid in 4 to 6 weeks.Read the guide →Grants & RegulationsWhy cavity wall grants get refusedWhy SEAI cavity wall grants get refused: work before approval, built from 2011, an earlier wall grant, partial walls, no BER, the 8-month deadline.Read the guide →Grants & RegulationsStarted the work before the grant was approved?Work started before SEAI approved the cavity wall grant gets nothing, and neither do materials bought early. What to do now, and the right order.Read the guide →Grants & RegulationsCavity wall and attic grants togetherThe SEAI cavity wall and attic grants together: €2,800 for a semi-D, €3,800 detached, the BER, and what's left to pay.Read the guide →

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

Can landlords get the cavity wall grant?

Yes. Private and commercial landlords of let property are among the applicants SEAI accepts.

What is the HAP or RAS rate?

The higher rate: €2,300 for a detached house, €1,700 for a semi-D or end of terrace, €1,100 for a mid-terrace and €900 for an apartment.

Do I need proof of the HAP tenancy?

SEAI may ask for evidence that the home is let to a HAP or RAS tenant.

Is there tax relief for landlords?

A deduction of the lesser of €10,000 or the cost net of the grant, for up to three properties, for work from 2026 to 2028.

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 →

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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.

Get a free quote