Three waters manager Glenn Cooper said staff visited the properties to investigate the cause of the issues that occurred during last week's heavy rain event.
"We can confirm that all the catchpits on Bridge St were clear and flowing, but there was too much water for the system to cope with," Cooper said.
"The inundation was caused by part of the overloaded system flowing back into an open drain and then onto some of the nearby properties.
"Council has arranged for the installation of a manhole and chamber with a flood gate at this site to prevent this happening again. We are confident that this will significantly lessen the chance of similar flooding in the area during future heavy rain events."
- Local Democracy Reporting is Public Interest Journalism funded through NZ On Air