Homeowners will usually need basic property details, the home’s MPRN, and information about the planned upgrade when discussing an SEAI grant with a registered contractor. You may also be asked for proof of ownership or occupancy, a recent BER certificate where relevant, and quotations or invoices for the proposed works. The exact paperwork depends on the grant route and whether you apply directly or through a one-stop shop. Check the current requirements on the official SEAI website and confirm the document list with the registered contractor before work begins.