The WRc Part G Water Efficiency Calculator is now live! Feel free to visit the calculator HERE!

The online water calculator follows the methodology provided in CLG’s ‘The Water Efficiency Calculator for new dwellings’ for assessing water efficiency in new dwellings in support of The Code for Sustainable Homes and the new Part G of the Building Regulations.

The online version produced by WRc is freely available for everyone including plumbers, architects, designers, Building Control and Approved Inspectors to use to ensure that new dwellings meet this requirement.

If you have any questions regarding the calculator, please contact us at This e-mail address is being protected from spambots. You need JavaScript enabled to view it .