Engineer Workshop

The Engineer Workshop is a building only encountered in Bloons Monkey City.

Structure
In BMC Flash, the building initially appears as an enclosed worker's building with corregated steel walls and a yellow roof. It has got a cylindrical chimney, windows on the roof, and a square open door with red beams. After unlocking one tier-4 upgrade, it appears to have a green roof, and the building itself gains an attic at the top, which has another window with similar red beams. (insert info for the one with all tier-4 upgrades unlocked)

In BMC Mobile, the building initially appears as an open room with a corner desk with tools and a bunch of other mechanics stuff. On the bottom-left is a mechanic using a wrench to turn a bolt of the Monkey Engineer's nailgun, which is lying on a sort of mechanic's bench. When one of the tier-4 upgrades are unlocked, the mechanic's bench is improved and has a sentry, and there is a more wide variety of tools on the corner desk. When all tier-4 upgrades are unlocked, the room has a metal floor with a white corner desk, the engineer bench is more advanced, and the mechanic is turning the bolt of a Bloon Trap.

Trivia

 * The engineer that's working on gun is the same as the one working in Advanced Chipper Lab.