The example specifications below have been put together considering cost, the performance and availability of relevant fittings and appliances and the end-user attitudes to these fittings. The Water Efficient Product Labeling Scheme is a comprehensive and extensive database of water efficient products and is a good place to start looking for products for a water-efficient home.
Strategies for meeting water consumption targets can be broadly divided into fittings-based and recycling-based strategies. Fittings-based strategies rely on smart specification of efficient fittings and may add to the cost of a new home, but how much will largely depend on which fittings are chosen (CLG estimates £125 for a home meeting CSH Level 3 or 4). Recycling-based strategies can be used in combination with efficient fittings to achieve challenging water consumption target of Code Levels 5 and 6.
Here are several example specifications, using different strategies to meet Code level 3 and above: