My Lords, I support the amendment of the noble Baroness, Lady Parminter. As she has said, it is meant to be helpful in the context of our legally binding commitment to reduce our greenhouse gas emissions. The important thing to remember is that the new houses which are to be built now will be
around for a long time—probably 100 years or more. It is inevitable that over time, we will need to tighten our greenhouse gas emission standards and move towards a zero-carbon homes standard. If, in building them, we do not meeting that standard today, they will have to be retrofitted in future. It is all very well to say, as the noble Viscount did, that we will undertake a review, but in the time it takes to carry out that review, many homes will be built. We will be storing up trouble with the homes we build while carrying out yet another review.
In the other place, it was noted that this requirement would “slow down or prevent” the building of new homes. Let us look at the counterfactual: let us say that we do not implement this amendment and go ahead rapidly with building new homes, but that those new homes are not fit for purpose in the future. Surely, that cannot be a good principle. If we are to build new homes now, we should think about their long-term implications for both greenhouse gas emissions and, as the noble Baroness, Lady Parminter, said, the energy bills of those who will live in them. Finally, we have the chance now to legislate to make greenhouse gas savings through this measure, and if we do not, the country will have to make them elsewhere. In the debates in Committee or Report, nobody has said, “Okay, we’re not going to make the savings here—but here’s where we are going to offer up savings elsewhere in the country”.