In a reserved judgment, Judge Keith de Ridder rejected the Rogans' argument that if the rates' assessments were valid, the rates' invoices did not comply with the Local Government Rating Act.
The judge said section 47(2) of that Act stipulated: "The ratepayers' liability to pay is not affected by the fact that the correction of the rates' invoice is required."
The KDC argued any challenges to rates' assessment were to be brought in the High Court via judicial review to ensure rating streams were not compromised by nullifying assessments and invoices for minor irregularities.
For the Rogans, lawyer Jeremy Browne argued his clients did not challenge the validity of the rates themselves but were rather saying their liability to pay had not been triggered as they have not been issued compliant rates' assessments and invoices. Judge de Ridder disagreed, saying any challenge to the validity of rates in the High Court was restricted to grounds the local authority was not empowered to set or assess rates.
The Rogans were ordered to pay KDC $20,878 and interest at 5 per cent from October 14, 2014, until the date of payment.
There is also an order of costs against them which will be fixed by the Registrar.
Mr Rogan said they would be filing an appeal in the High Court and would also seek a stay of Judge de Ridder's decision pending appeal.
"The difficulty is the District Court appears to have taken the view even where the council (KDC) has admitted it hasn't complied with the law that it didn't matter."
KDC chairman of commissioners, John Robertson, said other ratepayers who have not paid their dues over the years should start paying them now.