When there's not enough room in a zoned area to put up a building, it gets filled with a random piece of "junk" instead. This is most obvious in industrial zones because they tend to have larger space requirements, but it happens in residential areas too.

Sometimes I see junk appear in areas that actually can hold buildings, as proven after I delete the junk and a building later appears. Other times, the junk comes back and I have to delete it again a few times before something finally builds. Finally, should a building get bulldozed or replaced, deleting junk seems to have an effect on where any replacement building appears.

Does the game ever proactively delete junk when it comes to constructing new buildings, or do I have to constantly delete it myself?

2 Answers 2


fences pools and doghouses

I had a gross number of filler buildings generate after a fire. They were automatically replaced within 48 game hours, space permitting.

  • @DavidStarkey "they were automatically replaced within 48 game hours, space permitting". automatically means - No, you don't need to monitor the junk.
    – Amy B
    Commented May 24, 2013 at 18:55
  • Ah, I read that as those little buildings were automatically placed after 48 game hours.
    – Batophobia
    Commented May 24, 2013 at 20:08

The game will clear up junk if it needs to in order to increase the density of an adjacent building. The game will also eventually clear up abandoned buildings, burned down buildings, and rubble - although it is normally quicker to bulldoze them yourself.

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