This pilot considered that the landing site was quote "tight" but "very do-able". It was later proven that the rotor tip clearance was 81cm maximum.
IIRC on SAR, with a crewman to monitor tip clearance, the minimum tip clearance for non life saving was 10 feet laterally.
What is your personal minimum for lateral rotor tip clearance? Does your company publish one or is it left to your discretion?