Kapil Patil, who was the NCP Thane rural district unit president, was welcomed into the BJP here by its senior leader Gopinath Munde and Maharashtra unit president Devendra Fadnavis.
Patil told reporters that he left NCP since he felt that only an able leader like Narendra Modi could ensure development of his Bhiwandi Lok Sabha constituency.
Patil is likely to be the BJP candidate from Bhiwandi and a formal decision is expected tomorrow.
"There is no point exerting pressure on a father to prevent his daughter from joining any other party," Munde said.
"Even nephews don't listen to uncles, as can be seen from mine and Balasaheb's (Thackeray) case," Munde said, in an apparent reference to his nephew Dhananjay joining the NCP and the late Thackeray's nephew Raj leaving the Shiv Sena and forming the Maharashtra Navnirman Sena (MNS).