Mr. John McCarthy:

Our knowledge of existing properties is based on our knowledge of the social housing stock. When one looks at what people refer to as private housing, it would have to be determined property by property. In terms of retrofitting social housing, we would do it at least one road at a time, if not one estate at a time, which yields economies of scale. Our analysis at this stage would suggest that it costs somewhere between €20,000 and €30,000 for a deep retrofit on the social housing stock. However, that includes the economies of scale that can be realised by virtue of doing a large number of units together. The profile that the Senator may have got from the SEAI for individual houses might be different from that.