BOS/BAS Letters

A building over sewer letter tells you if Sydney Water approved a building close to, or over, Sydney Water pipes. 

Selling agents and conveyancers use the letter to determine if a building on a property has been built with Sydney Water approval.

Sydney Water must approve all buildings and structures that need approval from council or a private certifier. 

If your building is close to, or over, our pipes, you need to understand Sydney Water requirements. They ensure:

  • you don't damage pipes and structures
  • Sydney Water have ongoing access to maintain pipes and structures

BOS/BAS Letter features and benefits

  • InfoTrack's system automatically picks up the council locality of the property and alerts you to which certificates are relevant for that property.
  • Ability to chase waiting certificates and view updates through the iSupport System