The SEAI (Sustainable Energy Authority of Ireland) Home Energy Upgrade Scheme — previously known as the Better Energy Homes scheme — is the Irish government's main grant programme for residential energy retrofitting. For homeowners with older, inefficient homes, it can significantly reduce the cost of upgrades that deliver lower energy bills, higher BER ratings, and reduced carbon emissions.
This guide covers what's available in 2026, how the grants stack, what the process looks like, and how to decide whether an upgrade is financially worthwhile for your home.
What Is the Home Energy Upgrade Scheme?
The scheme provides direct grants to homeowners carrying out energy efficiency improvements. Unlike a loan scheme, these are non-repayable grants — money from the government that does not need to be paid back.
The scheme operates through SEAI-registered contractors. You cannot claim the grant for DIY work or from non-registered suppliers. SEAI maintains a public register of registered contractors at seai.ie.
Who Can Apply?
The scheme is open to:
- Owner-occupiers of homes built before 2011
- Landlords upgrading rental properties (subject to specific conditions)
The home must be your principal private residence (for owner-occupiers) or a tenanted property in Ireland. Apartments in multi-unit buildings have a separate pathway through SEAI's Multi-Unit Development scheme.
New builds (built after 2011) are generally excluded, as they are required to meet modern energy efficiency standards under Building Regulations.
Available Grants in 2026
SEAI grant amounts for the main upgrade types:
| Measure | Maximum Grant | |---------|--------------| | Attic insulation | €1,500 | | Rafter insulation | €3,000 | | Internal dry-lining wall insulation | €4,500 | | External wall insulation | €8,000 | | Cavity wall insulation | €1,700 | | Heat pump (air-to-water) | €6,500 | | Heat pump (ground/water-source) | €6,500 | | Solar PV panels | €2,400 | | Solar thermal (hot water) | €1,200 | | Heating controls upgrade | €700 | | Windows and doors | €1,500 | | Mechanical ventilation | €1,500 |
Maximum combined grant for a whole-home upgrade: €25,000
For a whole-home retrofit combining external wall insulation, attic insulation, heat pump, heating controls, and solar PV, a homeowner can receive up to €19,100 in grants — roughly 40–60% of the total installation cost for a typical semi-detached home.
The One-Stop-Shop Route
SEAI offers a One-Stop-Shop route where an approved contractor manages the entire upgrade process — assessment, design, contractor coordination, grant applications, and BER certification. You deal with a single point of contact throughout.
The One-Stop-Shop route is designed for whole-home upgrades and is the most streamlined path for homeowners who want to do a comprehensive retrofit rather than single measures. SEAI has a list of approved One-Stop-Shop providers on their website.
The alternative is applying for individual measures through the standard scheme — suitable if you only want, say, attic insulation or solar panels rather than a full retrofit.
What Does a Retrofit Actually Cost (After Grants)?
A full whole-home retrofit for a typical Irish semi-detached home (100 m², built in the 1970s–1980s, BER D1) covering external wall insulation, attic insulation, heat pump, and heating controls typically:
- Total cost before grants: €35,000–€55,000
- SEAI grants: €16,000–€19,000
- Net cost after grants: €18,000–€36,000
- Annual bill saving: €800–€1,500 depending on previous heating fuel and new BER rating
- Simple payback period: 15–30 years on bill savings alone
The payback period is long if you calculate purely on energy bills. However, there are additional financial benefits:
- Property value uplift: BER upgrades from D to B2 can add €10,000–€25,000 to property values in Irish markets
- Comfort and indoor air quality: harder to quantify but often cited by retrofit homeowners as the most meaningful benefit
- Future carbon price compliance: homes with gas boilers will face increasing carbon tax on gas consumption as carbon pricing rises to €100/tonne by 2030
SEAI Warmer Homes Scheme: Free Upgrades for Lower-Income Households
If you are in receipt of certain social welfare payments (including Fuel Allowance, Working Family Payment, Disability Allowance, or others), you may qualify for free home energy upgrades through the SEAI Warmer Homes Scheme.
This is a separate, fully-funded scheme — not a grant towards works, but the full cost covered. It includes insulation, heating controls, and in some cases heating system upgrades. There are waiting lists, but there is no cost to the homeowner.
Eligibility is based on income and benefit receipt. Check SEAI's Warmer Homes Scheme page for the current qualifying payments list.
How to Apply
Step 1 — Get a BER assessment Before applying, you need a BER certificate from a registered assessor (around €150–€250). This establishes your starting point and is required for the grant application.
Step 2 — Get quotes from SEAI-registered contractors All work must be done by SEAI-registered contractors. Get at least two quotes. SEAI's contractor register is searchable by measure type and county.
Step 3 — Apply online Apply through SEAI's grants portal at grants.seai.ie before work begins. Applications cannot be backdated.
Step 4 — Works completed and signed off Works must be completed by a registered contractor and certified. SEAI conducts random technical inspections.
Step 5 — Grant paid directly to contractor or to you Depending on the route, SEAI pays the grant either directly to the contractor (One-Stop-Shop) or to the homeowner upon completion.
Is It Worth Doing?
The financial case is strongest for:
- Homes with BER D or below (the further from the target BER, the greater the improvement)
- Homes with oil boilers (oil is more expensive per kWh than gas, making the switch to a heat pump more favourable)
- Homeowners planning to stay in the property long-term
- Homeowners considering selling, where BER uplift adds market value
The case is weaker for:
- Homes already at BER C or above
- Homeowners planning to sell within 3–5 years
- Gas homes where the heat pump economics are marginal
Regardless of whether you retrofit, make sure you are on the cheapest available gas or electricity tariff in the meantime — compare Irish energy tariffs here.