Your guide to SEAI deep retrofit grants with Energia

A deep retrofit addresses these weaknesses through one coordinated upgrade project. By improving insulation, heating, ventilation and overall energy performance, you can create a warmer and more comfortable home.

With SEAI deep retrofit grants, eligible homeowners may be able to reduce the cost of the work, while Energia’s Home Upgrades service can guide you through the process, from your initial assessment to grant administration and your final BER rating.

What does a deep retrofit involve?

Retrofitting improves several areas of an existing home to achieve a much higher level of energy efficiency. Depending on the property, work may include attic, floor or wall insulation, replacement windows and doors, airtightness measures, mechanical ventilation, a heat pump, heating controls or solar PV.

With Energia’s Home Upgrades, you can explore a wide range of SEAI deep retrofit grants, with support of up to €40,000 per home for eligible projects. The final amount available to you depends on your property type, the selected measures and the applicable scheme requirements.

Before deciding how to proceed, you can use our energy-upgrade calculator to receive an indicative breakdown of your potential project costs and available funding. 

A detailed breakdown of SEAI deep retrofit grants

The value of retrofit grants varies according to your home type and the upgrades included in the project. While detached homes generally qualify for higher insulation and window grants, several other supports such as ventilation and airtightness remain the same across all property types.

When a project is completed through Energia, approved retrofit grants are deducted upfront from the total cost. This means you pay the remaining project balance instead of paying the full cost and waiting to claim the funding afterwards.

The table below summarises several of the main retrofit grants available through SEAI:

Who may qualify?

To access retrofit grants, your home or property generally must have been built and occupied before 2011. 

Once the upgrades are completed, it must achieve at least a BER rating of B and either include a heat pump or meet the required improvement in primary energy use. 

You may not be eligible to claim funding for a measure that has already received an SEAI grant. 

You may also qualify for an enhanced attic-insulation grant if you are a first-time buyer of an older home. Under the initiative, you must have purchased a second-hand property on or after 1 January 2025 and must not have owned another home before purchasing it.

Getting started with Energia’s Home Upgrades service

If you're considering a retrofit through Energia's Home Upgrades, you can either call 0818 111 117 or complete the online enquiry form to learn more about available grants and home-upgrade options. One of our representatives will then contact you to discuss your property, the improvements you are considering and the next steps.

Once the scope of the project has been agreed, Energia will manage the entire project, from initial assessment to full management, and arrange the grant application on your behalf as well as new BER paperwork.