Igloos are otherwise known as a Penguin's home in-game. They are fully customizable from the type of Igloo itself, to the flooring, furniture, location, and music.
The two primary catalogs for your Igloo are the Better Igloos and Furniture catalogs. Both of these catalogs are accessible directly from the Edit menu of your own Penguin’s igloo. They follow a similar update schedule to that of the Penguin Style being updated on a monthly basis, generally.
The Better Igloos catalog is your primary source for obtaining igloos on the island. This catalog also offers flooring and locations.
The Furniture Catalog is your primary source for furniture items on the island. Featured in these catalogs include a wide variety of floor, room, and wall furniture items.
Club Penguin Legacy also features an innovative Igloo Builder that allows for greater accessibility and your imagination as an igloo building enthusiast to run wild.
A fun little Easter Egg: If you type the keyword "BUILDER" inside the Igloo Builder interface, you'll be able to decorate your igloo without any boundaries!