85-year Kotwal is survived by his son and three daughters.
Kotwal's mortal remains was brought here from New Delhi and has been sent to his native place Bhaderwah in Doda district for last rites.
Party leaders, admirers, friends and well wishers of Kotwal paid their respect after his body was kept at party head office at Kachi Chawni in Jammu.
Condoling his death, senior BJP leader Lal Krishna Advani said, Kotwal played an important role in Dr Shyama Prasad Mookherjee's efforts for total integration of Jammu and Kashmir with India and his demise has caused irreparable loss.