Johnson v Robertson, 2015 NY Slip Op 06658 (2d Dept. 2015).
Moreover, “[p]roof of damages may be based solely on oral testimony as long as the witness has knowledge of the actual costs” (Electronic Services. Intl. v. Silvers, 284 A.D.2d 367, 368, 726 N.Y.S.2d 441). The record demonstrates that the Robertson defendants, who had 20 years of experience in construction and had built over 100 homes, had knowledge of the actual costs of the services being provided