Yes, if the installation of the fitting(s) will involve alterations to, or new connections to, a drainage stack or an underground drain.
No, provided the work only involves an additional fitting(s) in the same or new location which does not involve extensions to the drainage pipework.
By telephone: 01628 796870
By email: building.control@rbwm.gov.uk
By post: RBWM Building Control Consultancy, Tinkers Lane Depot, Tinkers Lane, Windsor, Berks SL4 4LR