You will typically need the property address and MPRN, proof of ownership or occupancy, and details of the existing home, such as its BER and construction type. The registered contractor or One Stop Shop may also ask you to sign application, consent and declaration forms, and provide any relevant planning or building-control information. Requirements can vary between SEAI schemes, so check the document list before work begins and keep copies of quotes, invoices and completion paperwork. SEAI or the participating contractor makes the final decision based on your home and circumstances.