Chadwick made his debut for the Golds last weekend in their 3-2 defeat in their clash against Lancing and also featured in their Sussex Transport Senior Cup win against Seaford earlier this week.
The 18-year-old initially joined Whitehawk on dual registration terms this season but has made the switch to Littlehampton in search of more game time.
He made the headlines at the start of August when he scored from his own half in the Sussex Community Shield victory over Broadbridge Heath.
That night he captained a youthful Reds side to victory, also securing the win with the decisive penalty in the shoot-out victory.