Building Regulations Part G

Building Regulation Part G - Water Efficiency

New dwellings must not exceed the new water efficiency standard of 125 litres per person.

Under the new part Part G of the Building Regulations all new homes are now required to comply with water efficiency targets. Building Control will now require you to provide calculations demonstrating that your proposed dwelling can function at a level of water consumption of less than 125 litres of potable water per person per day. This calculation also takes into account the use of grey water systems.

It should be noted that it is now a requirement within the SAP calculations that all dwelling units should have a Water Efficiency Calculation carried out.

In order to comply with these regulations designers and developers will now have to give careful consideration to the sanitary ware, plumbing fittings and white goods to be installed in the dwelling. Flow rates of plumbing fittings including taps and shower valves along with bath sizes, WC cistern flushing volumes and water usage by dishwashers and washing machines etc. will all need to be considered in combination to calculate resultant water consumption.

Gladwood use approved ‘water efficiency calculator for new dwellings’ to demonstrate your building is compliant with Part G.