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For the Home Village version, see Laboratory.
Star Laboratory9.png

"The Star Laboratory searches the heavens for secrets to unlock a troop's full potential. Improve troop hitpoints, damage and housing space in addition to special troop abilities!"


Star Laboratory Ruin.png Star Laboratory1.png Star Laboratory2.png Star Laboratory3.png Star Laboratory4.png
Ruin Level 1 Level 2 Level 3 Level 4
Star Laboratory5.png Star Laboratory6.png Star Laboratory7.png Star Laboratory8.png Star Laboratory9.png
Level 5 Level 6 Level 7 Level 8 Level 9

Summary

  • The Star Laboratory is a building that allows the player to upgrade their troops, much like the Laboratory in the Home Village. The Star Laboratory is unlocked at Builder Hall level 2.
    • At the beginning of the tutorial, the Star Laboratory is ruined. It is automatically rebuilt after repairing the Builder Hall during the tutorial.
  • Like in the Laboratory, if the Star Laboratory is upgraded while research is in progress, the research will continue as if the Star Laboratory was not upgraded at all, but with one exception: if an upgrade within the Star Laboratory would complete while the Star Laboratory itself is being upgraded, the upgrade will not complete until the Star Laboratory finishes upgrading.
  • Troops are upgraded using Builder Elixir. Upgrades may improve their hitpoints, damage, their special ability, or the number of the same type of troop that is able to fit into one Army Camp.
    • All troops unlock their special abilities at level two, except the Night Witch, whose ability is unlocked at level four. The abilities improve as a troop is upgraded.

Upgrade Differences

  • Each time the Star Laboratory is upgraded (depending on what level) you can see Roman numerals (I-IX) in front that corresponds to the level of the Star Laboratory.
  • The Star Laboratory undergoes significant changes at levels 1, 3, 4, 5, 6, and 9.
    • At level 1, the Star Laboratory appears to be an observatory-like building with a small telescope protruding through its top tied with ropes.
    • At level 2, the ladder is moved to the left side of the Star Laboratory with a ramp on the right. The rope is removed from the telescope, and its rim becomes stone.
    • At level 3, the telescope is longer and a ramp replacing the stairs on the left side. The door frames are also partially gold, and the telescope's rim becomes metal.
    • At level 4, the telescope is now golden along with the door frames and the ramp on the right side is replaced by a pressure gauge, similar to those on the Laboratory. The roman numerals also turn gold.
    • At level 5, the telescope becomes rotatable on top of the Star Laboratory using gears. The ramp on the left side turns into metal stairs. The blue gear on the top by the telescope turns golden.
    • At level 6, the telescope's aperture is larger and the type is changed with a refracted focal length, making the overall length shorter.
    • At level 7, a secondary, smaller telescope is added to the right of the primary.
    • At level 8, a tertiary telescope is added next to the secondary on top of the primary. The pressure gauge also turns golden on top.
    • At level 9, the main telescope is reversed to normal length. The needle on the gauge also disappears. A stone also is placed behind the gear.

Trivia

  • Like the Clock Tower, and Town Halls 12, 13, and 14, it has Roman numerals corresponding to its level.
  • The Star Laboratory is the Master Builder's favorite building, as mentioned in the tutorial.
  • Unlike most other Builder Base buildings, the Star Laboratory takes up a 4x4 space.
  • All troops can be upgraded to level 2 without having to upgrade the Star Laboratory to match the Builder Hall level.
  • The Star Laboratory has the same research icon (with a sword and a spell bottle) as the Laboratory. Ironically, the Builder Base has no spells to upgrade.
  • The upgrade time and cost of each troop "smoothly" follows the time and cost to unlock it (i.e. upgrading the Builder Barracks to the corresponding level).
  • Interestingly, in the Builder Base's Star Laboratory, when clicking a maxed out troop for your Star Laboratory level, the game shows you all of the levels and upgrade bonuses, as would normally happen if the troops was not maxed. However, in the Home Village's Laboratory, if you have maxed out a troop or spell for your Laboratory level, and click on it, the game tells you, "Level __ Laboratory required".

Icon Descriptions

Icon Info.pngTapping this icon displays information about the Star Laboratory, such as Level and Hitpoints.
Icon Upgrade.pngTapping this icon begins upgrading the Star Laboratory to the next level, if you have enough resources and a free Master Builder. When the Star Laboratory is at maximum level, this icon is not shown.
Icon HoB.pngTapping this icon instantly upgrades the Star Laboratory to the next level, at the cost of one Hammer of Building if you have one. When the Star Laboratory is at maximum level, or the Builder Hall requirements for the next level are not met, this icon is not shown.
Icon FinishNow.pngTapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of the displayed number of Gems.
Icon FinishNowBoB.pngTapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of one Book of Building. This icon is only shown if you have at least one Book of Building.
Icon FinishNowBoE.pngTapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of one Book of Everything. This icon is only shown if you have at least one Book of Everything but do not have a Book of Building.
Icon Cancel.pngTapping this icon, which is displayed only while an upgrade is in progress, cancels the current upgrade and refunds half of the upgrade cost.
Icon Research.pngTapping this icon opens up the Star Laboratory interface, allowing you to upgrade your troops' levels.
Builder Hall Level 1 2 3 4 5 6 7 8 9
Number Available 0 1 1 1 1 1 1 1 1
Size Size
4x4
Level
Level
Hitpoints
Hitpoints
Build Cost
Builder Elixir
Build Time
Time
Experience Gained
Experience
Builder Hall Level Required
Builder Hall
1 650 1,000 N/A N/A 2
2 800 15,000 10m 24 2
3 960 50,000 30m 42 3
4 1,152 300,000 8h 169 4
5 1,382 700,000 12h 207 5
6 1,658 1,000,000 1d 293 6
7 1,990 2,000,000 2d 415 7
8 2,388 3,000,000 3d 509 8
9 2,507 4,000,000 4d 587 9

*The cost for level 1 is as shown in the Shop. It is automatically repaired and the cost paid for when the Builder Hall is upgraded to level 2.

Max Troop Level by Star Laboratory Level

The following chart lists the maximum troop level attainable at each Star Laboratory level.

Troop Star Laboratory Level
1 2 3 4 5 6 7 8 9
Raged Barbarian 2 4 6 8 10 12 14 16 18
Sneaky Archer 2 4 6 8 10 12 14 16 18
Boxer Giant - 2 4 8 10 12 14 16 18
Beta Minion - 2 4 8 10 12 14 16 18
Bomber - - 2 8 10 12 14 16 18
Baby Dragon - - 2 8 10 12 14 16 18
Cannon Cart - - - 2 10 12 14 16 18
Night Witch - - - - 2 12 14 16 18
Drop Ship - - - - - 2 14 16 18
Super P.E.K.K.A - - - - - - 2 16 18
Hog Glider - - - - - - - 2 18

Upgrade Chart

The following charts lists the Star Laboratory level required, cost and time for each level of troop type.

Upgrade Chart Troop Level
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Raged Barbarian Lab 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9
Cost 3.5k 6k 9k 50k 100k 300k 330k 700k 900k 1M 1.2M 2M 2.2M 3M 3.2M 3.8M 4M
Time 30s 5m 15m 3h 6h 12h 12h 1d 1d 2d 2d 3d 3d 4d 4d 5d 5d
Sneaky Archer Lab 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9
Cost 5k 8k 12k 60k 120k 320k 350k 800k 1M 1.1M 1.3M 2.1M 2.3M 3.1M 3.3M 3.9M 4.1M
Time 3m 10m 30m 4h 6h 12h 12h 1d 1d 2d 2d 3d 3d 4d 4d 5d 5d
Boxer Giant Lab 2 3 3 4 4 4 4 5 5 6 6 7 7 8 8 9 9
Cost 20k 40k 60k 300k 320k 340k 380k 1M 1.2M 1.3M 1.5M 2.3M 2.5M 3.3M 3.5M 4M 4.2M
Time 30m 1h 2h 8h 12h 12h 12h 1d 1d 2d 2d 3d 3d 4d 4d 5d 5d
Beta Minion Lab 2 3 3 4 4 4 4 5 5 6 6 7 7 8 8 9 9
Cost 50k 80k 120k 250k 280k 320k 360k 900k 1.1M 1.3M 1.5M 2.3M 2.5M 3.3M 3.5M 4M 4.2M
Time 1h 3h 5h 8h 12h 12h 12h 1d 1d 2d 2d 3d 3d 4d 4d 5d 5d
Bomber Lab 3 4 4 4 4 4 4 5 5 6 6 7 7 8 8 9 9
Cost 150k 200k 250k 280k 320k 340k 360k 900k 1M 1.2M 1.4M 2.2M 2.4M 3.2M 3.4M 3.9M 4.1M
Time 3h 5h 8h 12h 12h 12h 12h 1d 1d 2d 2d 3d 3d 4d 4d 5d 5d
Baby Dragon Lab 3 4 4 4 4 4 4 5 5 6 6 7 7 8 8 9 9
Cost 200k 240k 280k 320k 360k 380k 400k 1M 1.2M 1.4M 1.6M 2.4M 2.6M 3.4M 3.6M 4.1M 4.3M
Time 5h 8h 12h 12h 12h 12h 12h 1d 1d 2d 2d 3d 3d 4d 4d 5d 5d
Cannon Cart Lab 4 5 5 5 5 5 5 5 5 6 6 7 7 8 8 9 9
Cost 400k 500k 600k 700k 800k 900k 1M 1.1M 1.2M 1.4M 1.6M 2.4M 2.6M 3.4M 3.6M 4.1M 4.3M
Time 12h 12h 1d 1d 1d 1d 1d 1d 1d 2d 2d 3d 3d 4d 4d 5d 5d
Night Witch Lab 5 6 6 6 6 6 6 6 6 6 6 7 7 8 8 9 9
Cost 600k 700k 800k 900k 1M 1.1M 1.2M 1.3M 1.4M 1.6M 1.8M 2.5M 2.7M 3.5M 3.7M 4.2M 4.4M
Time 12h 12h 1d 1d 2d 2d 2d 2d 2d 2d 2d 3d 3d 4d 4d 5d 5d
Drop Ship Lab 6 7 7 7 7 7 7 7 7 7 7 7 7 8 8 9 9
Cost 1.1M 1.2M 1.3M 1.4M 1.5M 1.6M 1.7M 1.8M 2M 2.2M 2.4M 2.6M 2.8M 3.6M 3.8M 4.3M 4.5M
Time 12h 12h 1d 1d 2d 2d 3d 3d 3d 3d 3d 3d 3d 4d 4d 5d 5d
Super P.E.K.K.A Lab 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8 9 9
Cost 1.6M 1.7M 1.8M 1.9M 2M 2.2M 2.4M 2.6M 2.8M 3M 3.2M 3.4M 3.6M 3.8M 4M 4.6M 4.8M
Time 1d 1d 2d 2d 3d 3d 4d 4d 4d 4d 4d 4d 4d 4d 4d 5d 5d
Hog Glider Lab 8 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9
Cost 1.6M 1.7M 1.8M 1.9M 2M 2.2M 2.4M 2.6M 2.8M 3M 3.2M 3.4M 3.6M 3.8M 4M 4.2M 4.4M
Time 1d 1d 2d 2d 3d 3d 4d 4d 4d 4d 4d 4d 4d 4d 4d 5d 5d
Builder Base Buildings
Defensive Buildings CannonDouble CannonArcher TowerHidden TeslaFirecrackersCrusherGuard PostAir BombsMulti MortarRoasterGiant CannonMega TeslaLava LauncherWalls
Traps: Push TrapSpring TrapMineMega Mine
Resource Buildings Builder Hall (Magic Items) • Gold MineElixir CollectorGold StorageElixir StorageGem MineO.T.T.O Hut
Army Buildings Builder BarracksArmy CampStar LaboratoryBattle Machine Altar
Other Buildings BoatDecorationsObstaclesClock Tower
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