Do I need planning permission or building regulations approval to install a sewage treatment plant?

You will need to submit a Building Control Notice before installation begins – this applies in all cases. Planning permission is more site-specific. All installation work within National Parks requires planning approval. Outside National Parks, small domestic installations usually fall under permitted development rights, but if you are in any doubt, we recommend consulting your local council’s planning department before proceeding. WCI can advise you on the consenting requirements for your specific site.