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By GamGem ResearchLast updated 15 Oct 2026

Clash of Clans Builder Base Guide: B.O.B. Control and Upgrade Order

Sample figuresVerified 15 Oct 2026 · not live

Current rules: no Builder Base change in the 30 Aug update or the 9 Jul balance post that we hold; extra shop Builder since 26 May 2026.

Battle Machine, our own drawing
Your next upgrade · B.O.B. fastestBattle Machine +1 level

Combined Hero Machine levels must reach 45; you have 0.

resource: Builder Elixirduration: in-gameshares a Builder
official requirement rows + editorial order · your entered levels

Sixth builder (B.O.B.) checklist0/4

  1. 1Three Gear UpsHome Village defenses geared up
  2. 2One troop at level 18highest Builder Base troop level
  3. 3One defense at level 9highest Builder Base defense level
  4. 445 Hero Machine levelsBattle Machine + Battle Copter = 0
Finishes last: 45 Hero Machine levels (45 to go)
requirements: official Builder Base 2.0 notes

What unlocks at each Builder Hall

Highest Builder Hall
BH10
official BB 2.0 notes
Builder Base builders
Master Builder + O.T.T.O. from BH6
official
Extra shop Builder
from BH2 once all Home Village builders are unlocked
official · 26 May 2026
BH10 caps
troops lv 20 · Hero Machines lv 35
official BB 2.0 notes · community wiki (Hero Machines)

What is blocking you

  • ClearNothing blocks your next upgrade.
Builder Base builders busyof 3
Rush debt100
Counts only gaps that block B.O.B. or your army; missing defenses that block nothing are ignored.

Battle Machine or Battle Copter?

Battle Machine

Battle Machine

Unlocks: BH5Max: 35 at BH10Job: ground hero, smashes buildingsStage use: often Stage 1
Your level
Battle Copter

Battle Copter

Unlocks: BH8Max: 35 at BH10Job: air hero, flies over walls; starts at level 15 when boughtStage use: fresh option for Stage 2
Your level
Combined levels toward B.O.B.: 0 / 45Sample

Which army do you use?

Star Laboratory priority: Baby Dragon first until level 18, then its support troops. Leave unused troops.

Offense first: Star Laboratory → Army Camps → Reinforcement Camp → Baby Dragon → Battle Machine → Battle Copter. community consensus

Stage 1 and Stage 2

STAGE ONEStage one route sketchClear Air Bombs and the Roaster path, then send Baby Dragon in one wave.
STAGE TWOStage two route sketchContinue with surviving troops; save the Hero Machine ability for the core.
After Stage 1, what survived?

Continue with troops; the Copter is the fresh option if unlocked. editorial

What to hit first

  • Kill firstAir Bombs, Roaster, Firecracker
  • Funnelouter walls on your entry side
  • Protectyour Hero Machine from Crushers
  • Ignoremines and storages
for Baby Dragon (air splash) · editorial

Which defenses to upgrade

  • Splashstops swarms and Night Witch bats
  • Air coveragestops Baby Dragon and Hog Glider armies
  • Anti Hero Machinestops Battle Machine and Copter pushes
  • Pathing / wallsstops ground funnels and Power P.E.K.K.A.
by the attack it stops · split opinion on order

Compare your upgrades

  • Gear Up (Home Village)Home VillageHome VillageB.O.B.
  • Baby DragonBuilder ElixirStar LabB.O.B.attacks
  • Key defense (to level 9)Builder GoldBB builderB.O.B.maxing
  • Battle MachineBuilder ElixirBB builderB.O.B.attacks
  • Battle CopterBuilder ElixirBB builderB.O.B.attacks
  • Star LaboratoryBuilder GoldStar LabattacksB.O.B.
  • Army CampBuilder GoldBB builderattacks
  • Reinforcement CampBuilder GoldBB builderattacks
  • WallsBuilder GoldBB buildermaxing
Costs and times are not held; type what the game shows. Rows sorted for "B.O.B. fastest".

Three practice drills

  • Attack 3 times entering from the same side; note where troops wander.
  • Hold the Hero Machine ability until the core; compare the result.
  • Once continue, once swap; compare Stage 2 stars.

Start from your situation

Where guides disagree

  • Rush to BH9/BH10 for B.O.B.consensus
    Most community advice rushes toward the B.O.B. requirements.
  • Defense ordersplit
    Guides disagree; this page orders defenses by the attack they stop.
  • Best trooppersonal preference
    Pick the army you enjoy; take one to level 18.
History and sources

Full costs, times and level tables are not held on this page; use the community wiki tables linked below. Pre-Builder Base 2.0 rules (versus battles, the old O.T.T.O. unlock) are no longer current. Entity counts by category are not established. The October Portal Panic season does not change Builder Base progression.

GamGem is an independent fan project, not affiliated with or endorsed by Supercell. No account needed; your levels stay in this browser. Facts checked 15 Oct 2026 (community wiki) and 26 Oct 2026 (official blog): Builder Hall 10 is the highest · maximum Town Hall 18 · latest update 30 Aug 2026 · latest balance announcement 17 Oct 2026.