In related child custody proceedings pursuant to Family Court Act article 6 to modify an order of custody, the mother appeals, as limited by her brief, from so much of an order of the Family Court, Nassau County (Brennan, J), dated December 20, 2004, as, after a hearing, dismissed with prejudice her petition for custody of the subject child in proceeding No. 2.
Ordered that the order is affirmed insofar as appealed from, without costs or disbursements.
In order to modify an existing custody arrangement, there must be a showing of a subsequent change of circumstances so that modification is required to protect the best interests of the child (see Matter of Strand-O’Shea v O’Shea, 32 AD3d 398 [2006]; Scheuering v Scheuering, 27 AD3d 446, 447 [2006]). The
Here, the Family Court’s determination that there should be no change of custody has a sound and substantial basis in the record and will not be disturbed. Although it was improper for the father to interfere with visitation, his uncooperative behavior was not sufficient to justify a change of custody. Rather, the evidence indicates that it was in the best interests of the child, who has been with the father since he was three years old, to remain with the father, who is not an unfit parent (see Matter of Chebuske v Burnhard-Vogt, 284 AD2d 456 [2001]; Matter of Plitnick v Oliver, 249 AD2d 399 [1998]; Matter of Wolfer v Wolfer, 183 AD2d 903 [1992]). Miller, J.P., Mastro, Dillon and McCarthy, JJ., concur.