Energy Upgrades

If you're thinking about making your home or business more energy efficient, the Sustainable Energy Authority of Ireland (SEAI) have a range of grants and supports available to help reduce costs and improve comfort. Since 2019, over a quarter of a million (257,000) home energy upgrades have been delivered, thanks to Government funding of €1.7 billion. Learn more about the new National Residential Retrofit Plan.

Simple upgrades like attic insulation, cavity wall, or external wall insulation can reduce heating bills by up to €230 annually. A full home retrofit can lead to savings of €750 to €1,120 per year on energy costs.

The SEAI offers a range of grants to gradually upgrade the energy efficiency of your home. Individual grants are available for wall or attic insulation, new windows and doors, heat pumps, solar thermal and solar PV. Learn more about Individual Energy Upgrade Grants on the SEAI website.

Windows and doors

A new grant was introduced in March 2026 for the installation of energy-efficient windows and doors (to replace poorly performing windows and doors) for homes where the building fabric will meet or already meets a specified minimum performance standard. Find out more about the windows and doors grant on the SEAI website.

Attic insulation grant for first-time buyers

A new attic insulation grant for first-time buyers of existing homes helps you get started with energy upgrades quickly and at minimal cost. Find out more on the SEAI website.

Second wall insulation measure grant

If you have already received a grant for cavity or internal wall insulation, you may be eligible for a second grant to further improve your home's insulation, making it warmer and cheaper to heat. Learn more on the SEAI website.

If you are a homeowner and receive certain social welfare payments you may qualify for a free energy efficiency upgrade to your home. Check out the eligibility criteria on the SEAI website.

The National Home Energy Upgrade Scheme provides a complete home energy upgrade (deep retrofit) for your home and is managed via a One Stop Shop service provider. Go to One Stop Shop services for homes on the SEAI website.

Homeowners on qualifying welfare payments are able to get higher grants for attic and cavity wall insulation. These grants often cover most or all of the cost and won’t affect your place on the Warmer Homes Scheme waiting list. For more information, on these grants, go to the SEAI website.

If a person in your household relies on life support equipment such as dialysis machines, ventilators, or similar devices, you may be entitled to free installation of solar photovoltaic (PV) panels. To qualify the person must be registered with your electricity supplier under the life support category of the Priority Services Register, and then discuss eligibility with your supplier. Read about the Extension of Solar PV Scheme for Medically Vulnerable Customers on our website.

If you need a loan to help fund your energy retrofit the Home Energy Upgrade Loan Scheme offers government backed loans up to €75,000 from as little as 2.99% interest. This loan must be used for home energy upgrades carried out by a SEAI Registered One Stop Shop or Project Co-ordinator. Find out more about the Home Energy Upgrade Loan Scheme on the Strategic Banking Corporation of Ireland (SBCI) website.

SEAI business grants for energy upgrades

The Sustainable Energy Authority of Ireland (SEAI) offers a range of initiatives and supports to improve business energy efficiency. These include:

• energy audits
• free training
• financial supports for energy efficiency investments
• programmes such as EXEED and the Support Scheme for Renewable Heat (SSRH)

Grants are available for small and medium businesses to upgrade buildings with:

• solar thermal or solar PV
• heating and cooling systems
• building insulation and fabric improvements

These include government-funded EXEED and Support Scheme for Renewable Heat (SSRH). The SEAI also continues to support energy audits, provides free training for businesses, and provides financial supports to those businesses that want to invest in energy efficiency.

There are a range of different SEAI grants available for small and medium businesses to enhance the energy efficiency of their buildings. Choose from solar thermal and solar PV, building fabric upgrades, heating and cooling upgrades and Learn more about these grants on the SEAI website.

Solar thermal

Solar thermal systems enable businesses to generate their own solar energy for hot water. SEAI offer a business grant of up to 30% for solar thermal.

This grant is open to businesses, farms, public bodies, community groups and charities seeking to reduce their carbon footprint and save money.

Non-Domestic Microgen Grant – Solar PV

The Non-Domestic Microgen Grant (NDMG) helps businesses, farms, schools, community centres and non-profit organisations install solar PV panels to generate electricity on site and help reduce commercial electricity costs. Grant funding is available for systems up to a maximum 1000kWp.

Building fabric upgrades

How well your building retains heat directly impacts your fuel costs. Make your building more comfortable by replacing the roof fabric or better insulating the walls with an SEAI grant of up to 30% for wall and roof fabric.

SEAI Community Grant

This grant supports the upgrade of homes, community buildings and businesses across Ireland to become more energy efficient and reduce costs. Access capital funding, partnerships and technical support on the Community grants and funding section of the SEAI website.