There is no single fixed deep retrofit grant in Ireland: support depends on the work required, your property and the SEAI scheme used. Through a registered One Stop Shop, grant support may cover a substantial portion of eligible upgrade costs, potentially amounting to several thousand euro or more, but the final figure is calculated for each project. The contractor must assess your home and confirm the available support, measures and expected BER improvement. Check the latest rates on the official SEAI website before starting work, as grants and conditions can change.