Build a Birthday is a party supplies business at 2/51 Montgomery Crescent in Clouston Park, Upper Hutt. It sells party supplies, helium balloons and cake decorating supplies, and it is mainly an online shop. Orders can be delivered to the door, or collected from its warehouse in Upper Hutt. Free shipping applies to orders of $150 or more as at 2026, though helium balloons and large items are excluded. Orders received by 2.30pm can ship the same day. Our pick in Upper Hutt for a birthday that needs supplies sorted in a day.