Defendants' first argument is that the trial court erred in refusing to void the restrictive covenant because a change in circumstances in the surrounding neighborhood had rendered the covenant no longer enforceable. Uvanni v. CMB Builders, Inc., 41 A.D.2d 1019, 343 N.Y.S.2d 954 (1973); Metropolitan Investment Co. v. Sine, 14 Utah 2d 36, 376 P.2d 940 (1962). However, in order to render a restrictive covenant unenforceable the change must be so great that it clearly neutralizes the benefits of the restriction to the point of defeating its purpose, or of such a nature that it renders the covenant valueless.