The exterior of the building is a half-open sardine can with a pinkish-red fish on it. Underneath is a light purple awning which hangs over an open entrance to the interior.
Role in game
At Squidward's house, SpongeBob sees an ad for Sardine's Sundries. In the ad, it offers "Dream Glasses," which SpongeBob needs in order to enter Squidward's dream. There he can obtain his clarinet to retrieve a sea snake out of his water helmet so that he can enter Sandy's treedome.
SpongeBob goes there and gets the "Dream Glasses" for free.