Happy Home Network Design Contest

The Happy Home Network Design Contest is a monthly event accessible from the Happy Home Network in. It is run by King Nook, and there is a new theme every month. Each contest includes related items to use in the design, similar to DLC, which the player can use in later designs if they participate. Players can submit and vote on designs during the first half of each month, and the best designs are displayed on the Happy Home Network in the latter half.

As the contests have progressed, more of the exclusive items have been repeats of those used during previous contests. The October 2016 contest was the most recent one to include a "new" item (the Monitor Tower).

List of themes
{| class="collapsible" align="center" width="80%" style="height:40px; background:#5ed5d1; border:3px solid #12C7B7; " ! style="padding:3px 0 0 0"|
 * style="border-top: 1px solid #16c6b8; padding: 5px 3px 2px 3px"|
 * style="border-top: 1px solid #16c6b8; padding: 5px 3px 2px 3px"|
 * }