Toontown Rewritten Wiki
Toontown Rewritten Wiki
"I was just minding my own business looking around for some octopus ink in my shop when suddenly the entire block began rattling. I could hear a faint whistle, so I ran outside to see what the hub-bub was about. Just as I stepped out the door, some sort of humongous Cog Building landed on top of my shop and crushed the whole thing!"
Professor Wiggle[src]
14-5-15 cogsinc.png

A Cog Building is a skyscraper owned by the Cogs that falls from the sky and lands onto a Toon Building to spur sadness across the streets of Toontown. These Cog Buildings, each being a specific Cog type, can be up to five stories tall, depending on their locations and the level of the Cogs that enter them. Typically higher playgrounds have higher story Cog Buildings. Cog Buildings generally have tougher Cogs to defeat than those that roam the streets. Should Toons successfully defeat the Cogs within a Cog Building, the Toon Building that had been taken over will reappear and their success will temporarily be credited with portraits of themselves displayed on the wall of the Toon Building.


The warning message when a Toon tries to enter a Toon Building after a Cog enters inside.

A Cog Building forms when a Cog randomly enters a Toon Building; higher level Cogs may be more prone to doing this. Any non-NPC Toon inside the building will be kicked out. Attempting to enter the building when it is being taken over will bring up a message stating, "Watch out! There's a Cog in there!". Shortly afterward, the sound of a faint whistle plays, accompanied by a shadow forming over the Toon Building and crushing it as the Cog Building drops down.

Note that Cog Buildings have their own types like Cogs do. For example, if a Short Change takes over a Toon Building, the Cog Building will be a Cashbot building only containing Cashbots, unless there is an ongoing Cog Invasion.


The exterior of Chopin Blocks and Other Kitchen Supplies when taken over by Cogs.

The exterior of a Cog Building is a tall steely gray skyscraper lacking any color. When a Cog takes over a Toon Building, any surrounding street decorations will be hidden with the Toon Building as well. All of the Cog Buildings have menacing eyes on the top. The knock-knock doors turn into a doorway for incoming and outgoing Cogs. The Cog Building is named after the Toon Building it replaces, but with the abbreviation "Inc." added at the end. If the Toon Building does not have a name, it will simply be called "COGS, Inc.". The building type is also displayed below the building name.

The doorway is replaced with an elevator, which up to four Toons may enter to rescue the building. Above the elevators are white lights, which indicate how many floors the building has, and the name of the building. If Toons have entered the building and are inside, the elevator door will remain shut, and the lights will show the current floor the Toons are on.


Each floor contains progressively more Cogs that the Toons must battle. As the Toons battle the Cogs, more Cogs will come out of the elevators to join. Toons cannot run to the nearest playground while they are in battle, and friends will not be able to teleport to them during any part of the Cog Building.

The appearance of the interior is dependent on the floor. The first floor of all buildings is a boiler room with boilers on the sidewalls and a clock over the elevator. Any floors in between the first floor and the top floor are platforms from which one can see dozens of Cogs behind their desks working or sleeping. The top floor of all buildings except one-story buildings contains a statue of a Telemarketer and Bottom Feeder. The "boss" is an ordinary Cog that is higher level than the rest of the Cogs in the building. They will always greet the Toons with "I'm the boss." at the start of the top floor battle.

Between each floor, Toons are given 90 seconds to enter the elevator to proceed to the next floor. They may teleport out of the Cog Building at this time, but they will not receive experience if they do. If the timer runs out, they will be sent back to the nearest playground.


The difficulty of a Cog Building is solely dependent on the level of the Cog that took over, regardless of Cog tier, Cog type, or playground. Because level 1-9 Cogs can roam the streets and take over Toon Buildings, this means there are nine forms of difficulties for Cog Buildings that are not explicitly mentioned in-game.

  • Difficulty - Equal to the level of the Cog that created the Cog Building.
  • Floors - The number of floors the Cog Building can have.
  • Cogs - The level of Cogs the building can have.
  • Boss - The level of the "boss" Cog on the top floor.
Difficulty Floors Cogs Boss
1 1 1-3 4
2 1-2 2-4 5
3 1-3 3-5 6
4 2-3 4-6 7
5 2-4 5-7 8
6 3-4 6-8 9
7 3-5 7-9 10
8 4-5 8-10 11
9 5 9-11 12

This information shows, for example, that level 7 Cogs can create a five-story Cog Building with only a level 10 "boss" (Difficulty 7). This means that Walrus Way and Sleet Street have the easiest five-story Cog Buildings due to the level 5-7 range on the street.

Also note that there is no way for a one-story building to contain a level 7 Cog. Because building-only Cogs have a minimum level of 7 or 8, they can never be found in a one-story Cog Building by normal means.

Skill point multipliers

Battling within Cog Buildings can provide multipliers to skill points for gags. This multiplier is dependent on the current floor that a Toon is battling on, with floor one giving no multiplier and floor five giving the highest multiplier.

These multipliers can provide an efficient way of increasing one's gags or even a promotion, especially during a Cog Invasion which further doubles this multiplier.

The formula is as followed:

Cog Building multiplier = (f/2+0.5), where f is the floor number
Floor Without invasion With invasion
1 x1 x2
2 x1.5 x3
3 x2 x4
4 x2.5 x5
5 x3 x6


A Toon with a bronze spinning star.

After a Toon defeats a certain amount of floors, they will get a star above their name tag and be listed on the Toon Platoon. Toons can get the following stars:

  1. Bronze Star (10 floors)
  2. Bronze Spinning Star (20 floors)
  3. Silver Star (30 floors)
  4. Silver Spinning Star (50 floors)
  5. Gold Star (75 floors)
  6. Gold Spinning Star (100 floors)

If a Toon does not defeat a Cog Building for a long time, or if Cogs take over their buildings that they rescued, and the building points given from that building that the Cogs reclaimed are needed for the current star, they will lose the star if they have bronze, and they will get downgraded if it is a higher star. Toons can view all the Toons who have stars on the Toon Platoon boards in every Toon Headquarters.

Each district's Toon Platoon is unique. If a Toon switches to a different district, their progress from the previous district of which they came from will disappear.


Elevator theme
Bottom floors
In-between floors
Final floor


  • Although Cog Buildings have one Cog that introduces themselves as the "boss" in the final floor, their abilities and appearance do not distinctly differ from the rest of the Cogs.
  • Cog Buildings can have an influence on the Cog types that appear on a street; for example, if there is a Bossbot Cog Building on a street, the number of Bossbots on the street would most likely increase. This is because of buildings spawning Cogs of their type onto the streets.
  • Cog Buildings are somewhat uncommon on the streets of Toontown Central because the lower level Cogs are much less likely to take over a Toon Building.
  • If enough time passes, or if there is too many Cog Buildings on the street, a Cog Building will revert back to a Toon Building on its own.
  • There is a bug that causes Building Summons that implements a single difficulty higher than intended.
    • It is impossible to create a "Difficulty 1" Cog Building (one-story with level 4 "boss") using Building Summons.
    • There was previously a rare bug where it was possible to summon a "Difficulty 10" Cog Building that presented itself as one-story yet contained Cogs from the first round of the Vice President battle when using a tier 6+ Building Summon. This could be done on a street that naturally contained level 9 Cogs, such as Polar Place (33% chance), Lullaby Lane (25% chance), or Pajama Place (25% chance). This was the only way one-story Cog Buildings could exist on said streets at all, or contain building-only Cogs without a Cog Invasion. It was also the only way a one-story Cog Building could have multiple level 12 Cogs. As of the 2.7.0 update released on December 15, 2020, the bug is now fixed.
  • One of Toontown Online's many design documents that were offered to the Toontown Rewritten Team by Bruce Woodside for Toon Buildings and Cog Buildings was revealed by former staff member, Jeremy, on May 13, 2020.[1]
  • High difficulty Bossbot buildings are the only way to find ordinary level 12 Big Cheeses.