Each amenity has one of the 12 themes: generic, cool, cute, natural, sporty, rustic, hip, harmonious, elegant, modern, historical, or civic. Each of these themes has three tiers of amenities. The first tier of amenities allows villagers that prefer that theme to reach Friendship Level 10, and the amenities themselves can be upgraded to level 3, changing their appearance at the cost of items. Once a tier-1 amenity reaches level 3, the tier-2 amenity of the same theme can be built; these amenities can reach level 5 and make the max Friendship Level to 15. Tier-3 amenities can only be built once the level-2 amenity of the same theme has reached level 5. Once constructed, villager friendship caps off at the maximum level of 70. While tier-3 amenities can be upgraded, the only reward for doing so is an aesthetic change. Once built, amenities grant the player experience and increase the friendship of a selection of villagers at the campsite. The generic theme has only 1 amenity that cannot be leveled up. However, additional generic amenities with no effect on friendship caps have occasionally been available through certain events, such as the Snow Park amenity obtained from the Winter Sports event and its reissues.
Each campsite can hold up to two amenities in two amenity slots; these can be changed at any time through the Decorate menu. Starting in 4.0.0, furniture can be placed in the space where the amenities was placed.