Factory Forcer
by nerfashton
Factory Forcer is a Forge and NeoForge server mod that blocks lawn-style bases and requires players to build enclosed, roofed structures around their workstations.
What it does
Players who try to place a block outdoors find that it breaks back into the inventory once it is not covered. Placing a roof over the work area stops the breaking and sends a message that returns the held item. The rule uses a tag named indoor only, and any block that sits under a roof is allowed to remain.
The mod is aimed at survival servers that want construction to look like real indoor factories. It targets the kinds of builds that appear when weathering-era mechanics encourage players to construct nuclear reactors, enchanting setups and steam engines in open fields. Server owners who want more control can add their own blocks to the indoor tag with a tool such as KubeJS, and the author recommends this approach. Blocks already included in the mod can also be changed.
Factory Forcer is server-side only, so players join without installing it. It is published for Forge and NeoForge, with 7 release versions covering 1.20.1 – 1.21.1, and it is released under the MIT License. The source code and issue tracker are public, and the mod is open source.
Key features
Roof requirement
Blocks placed outdoors break until a roof covers them, so builds have to be enclosed.
Indoor-only tag
Whether a block is allowed is decided by the indoor only block tag, which server owners can extend.
Returned items
A player who attempts an uncovered placement gets a message and the item is returned to the inventory.
Editable block list
Blocks included in the mod can be modified, and extra blocks can be added through a datapack or KubeJS script.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Discouraging lawn bases
Server owners who want a neighborhood look can stop open lawn bases while players build enclosed workshops.
Factory-style builds
Players working on production lines are pushed to place machinery indoors around their workstations.
Who it’s for: Server owners running Forge or NeoForge survival servers who want building rules that require roofed, indoor construction.
Questions
Does Factory Forcer need to be installed on the client?
Which loaders does Factory Forcer support?
How can server owners allow more blocks outdoors?
In the catalog
Factory Forcer is one of 8,016 Management mods on ModsFinder, and one of 2,698 Management mods for Forge. 32,366 mods support Minecraft 1.21.1.
Similar mods
What the author says
Tired of seeing all your friends build lawn bases? Add HOAs to Minecraft! Factory Forcer intends to force players to build actual factories, or at least houses, around their workstations and machines. Because minecraft has no weathering mechanics, players can build nuclear reactors, enchanting setups, steam engines…
Official listing
- Modrinth page
- modrinth.com/mod/factory-forcer
- Owner
- nerfashton
- Published
- 2026-07-07
- Updated on Modrinth
- 2026-07-20
- Facts verified
- 2026-10-15