Commerce Commission's Consumer Investigations Manager Stuart Wallace welcomed the end of the fraud case.
"The Commission has been prioritising complaints about potentially illegal behaviour related to the Christchurch rebuild and working with other agencies where appropriate," he said.
"We are pleased that this case has finally been resolved and Mr Lilley has admitted the offending. Hopefully today's sentencing provides some closure for the affected landowners who have been left out of pocket and suffered the stress of his offending."
Alligator Drainage was placed in liquidation in March 2014, owing creditors just over $470,000.
Of the initial total loss of $220,000 borne by the landowners in this case, just over $100,000 has or will be repaid to complainants through EQC retrospectively approving some claims and reparation payments by Mr Lilley to other consumers.