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Star Laboratory9

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

  • Summary
    • The Star Laboratory is unlocked at Builder Hall level two.
      • It is automatically upgraded to Level 1.
      • At Builder Hall level one, it is ruined.
    • The Star Laboratory allows the player to upgrade their troops, much like the Laboratory in the Home Village.
    • 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 3, 4 and 6.
      • 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.
      • At level 6, the telescopes 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, it has Roman numerals corresponding to its level.
    • The Star Laboratory is the Master Builder's favorite building. This is 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 two 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. However, the Builder Base has no spells.
    • 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).

  • Icon Descriptions
    Icon InfoTapping this icon displays information about the Star Laboratory, such as Level and Hitpoints.
    Icon UpgradeTapping 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 HoBTapping 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, this icon is not shown.
    Icon FinishNowTapping 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 FinishNowBoBTapping 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 FinishNowBoETapping 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 CancelTapping this icon, which is displayed only while an upgrade is in progress, cancels the current upgrade and refunds half of the upgrade cost.
    Icon ResearchTapping 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 Hitpoint Build Cost ElixirB Build Time Stopwatch Experience Gained XP Builder Hall Level Required Builder Hall8
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

*Cost 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 24681012141618
Sneaky Archer 24681012141618
Boxer Giant -2481012141618
Beta Minion -2481012141618
Bomber - -281012141618
Baby Dragon - -281012141618
Cannon Cart - - -21012141618
Night Witch - - - -212141618
Drop Ship - - - - -2141618
Super P.E.K.K.A - - - - - -21618
Hog Glider - - - - - - -218

Upgrade Chart

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

Star Lab level, Cost and Time 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 12233445566778899
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 3m10m30m4h6h12h12h1d1d2d2d3d3d4d4d5d5d
Boxer Giant
Lab 2 3 3 4 4 4 4 5 5 6 6 7 7 8 8 9 9
Cost 20k40k60k300k320k340k380k1M1.2M1.3M1.5M2.3M2.5M3.3M3.5M4M4.2M
Time 30m 1h 2h 8h 12h 12h 12h 1d 1d 2d 2d 3d 3d 4d 4d 5d 5d
Beta Minion
Lab 23344445566778899
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 1h3h5h8h12h12h12h1d1d2d2d3d3d4d4d5d5d
Bomber
Lab 3 4 4 4 4 4 4 5 5 6 6 7 7 8 8 9 9
Cost 150k200k250k280k320k340k360k900k1M1.2M1.4M2.2M2.4M3.2M3.4M3.9M4.1M
Time 3h 5h 8h 12h 12h 12h 12h 1d 1d 2d 2d 3d 3d 4d 4d 5d 5d
Baby Dragon
Lab 34444445566778899
Time 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 5h8h12h12h12h12h12h1d1d2d2d3d3d4d4d5d5d
Cannon Cart
Lab 4 5 5 5 5 5 5 5 5 6 6 7 7 8 8 9 9
Cost 400k500k600k700k800k900k1M1.1M1.2M1.4M1.6M2.4M2.6M3.4M3.6M4.1M4.3M
Time 12h 12h 1d 1d 1d 1d 1d 1d 1d 2d 2d 3d 3d 4d 4d 5d 5d
Night Witch
Lab 56666666666778899
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 1.1M1.2M1.3M1.4M1.5M1.6M1.7M1.8M2M2.2M2.4M2.6M2.8M3.6M3.8M4.3M4.5M
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 78888888888888899
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 1.6M1.7M1.8M1.9M2M2.2M2.4M2.6M2.8M3M3.2M3.4M3.6M3.8M4M4.2M4.4M
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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