An additional $3.6m is being budgeted for the latest stage of the Leith Flood Protection scheme.

It's part of an almost $40m total redevelopment project being undertaken by the Otago Regional Council.

The extra money will go towards a section of work on Leith Street near the St David Street footbridge.

Regional Council staff are yet to calculate the final costings of the entire project.

The work is set to start next month.