Can a grandparent's contact application succeed over both parents' objections?

It's possible, but it's a harder case than one where at least one parent supports contact, since courts generally give real weight to a united position from both parents about who should spend time with their child. Where both parents agree contact isn't in the child's best interests, a grandparent has to present strong, specific evidence that the child would genuinely benefit from contact, and that the parents' shared objection isn't well-founded on the facts, rather than simply asking the court to second-guess two parents who agree with each other.

Courts aren't required to defer entirely to parental agreement, though - the test remains the best interests of the child, and a documented, meaningful relationship between the grandparent and child, combined with a weak or unsubstantiated reason behind the parents' objection, can still support an order, sometimes limited in scope, like supervised or reduced contact rather than a full schedule. What tends to matter most is concrete evidence: the history of the relationship, why it was cut off, and whether continuing it poses any real risk versus simply being something the parents would prefer not to happen. A family lawyer can help assess realistically how strong a case looks against a united parental objection.