Shivakumar, his wife, mother and other family members have been summoned for questioning as part of a routine process following the searches, I-T department sources said.
Shivakumar, the state's power minister, had already appeared before I-T officials in August and last month.
A close aide of the minister confirmed the fresh summons to the minister.
"Yes, yes. The Income Tax Department has summoned our sir (D K Shivakumar) and his family members, including mother and wife," the aide told PTI here.
Congress president Sonia Gandhi's political secretary Ahmed Patel was seeking re-election in the poll. He eventually won.
The searches had kicked up a political row with the ruling Congress alleging misuse of the I-T department by the central government to target its leaders.