Your question
Can I build over, or close to, a public sewer?
A minimum distance of 3 meters (for apparatus up to 3 meters deep) must be kept between any building and the public apparatus. This distance may need to be increased for deep or large diameter pipe work.
Building over, or close to water mains is never permitted; neither will building over, or in close proximity, to proposed or existing sewers on new developments or redevelopments.