In the Town Hall 16 update of December 2023, Clash of Clans introduced changes to the upgrade costs and time of all the buildings in the game. These changes greatly reduced the time needed for upgrading various buildings at different Town Hall levels. Previously, the Eagle Artillery and Clan Castle held the record for the longest upgrades in the game, but that is no longer the case.
Here are the new longest upgrades in the game:
- Laboratory – 16 days
- Ricochet Cannon and Multi-Archer Tower – 15 days, 12 hours
- X-Bow, Pet House, and Air Defense – 15 days
Laboratory
The Laboratory upgrade to level 14 is currently the longest upgrade in Clash of Clans, taking 16 days to complete. To do this upgrade, players must reach Town Hall 16 and spend 13,500,000 Elixirs. Once completed, this upgraded Laboratory unlocks higher levels for many elixir troops, and a few dark troops also get boosted at Town Hall 16.
The Laboratory is an important building because it lets players upgrade their troops, making them more powerful and effective in battles against other Town Halls.
Ricochet Cannon and Multi-Archer Tower
The second longest upgrade in Clash of Clans is leveling up your merged defenses to level 2. At Town Hall 16, players can combine two Cannons to form a Ricochet Cannon and two Archer Towers to create a Multi-Archer Tower. When you decide to upgrade these merged defenses to level 2, it takes a considerable waiting time of 15 days and 12 hours.
The Ricochet Cannon stands out for its increased power compared to a regular cannon. It can shoot at two targets with a single shot, dealing significantly more damage. On the other hand, the Multi-Archer Tower is another powerful defense, featuring more Archers than a standard Archer Tower. The Archers on a Multi-Archer Tower can simultaneously target up to three different targets.
X-Bow, Pet House, and Air Defense
The third lengthiest upgrades in Clash of Clans all share a common duration of 15 days. These include upgrading the X-Bow to level 11, the Pet House to level 9, and the Air Defense to level 14. Each of these upgrades demands a waiting period of 15 days.
For the X-Bow and Air Defense upgrades, players can expect boosted damage per second and increased hitpoints. Meanwhile, upgrading the Pet House to level 9 introduces a new pet– the Spirit Fox.
