BlockLimit
by ThisisBoar
BlockLimit caps how many of a chosen block type can sit in one chunk, and the server can enforce it for vanilla and modded blocks alike.
What it does
A server-side NeoForge mod that limits specific blocks per chunk. Each rule in the config file pairs a block registry ID with a maximum count and a report flag, for example minecraft:hopper with a limit of 32. Modded blocks are added the same way, using their registry ID.
If a player attempts to put down a block beyond the set cap, the action is blocked and the item goes back into the player's inventory. If reporting is enabled for that rule, the online admins named in the config receive a message. Creative players can be exempted with a config option, and the admin list is set by nickname.
The mod is released under the MIT License and is not open source. Files are published for NeoForge 1.21.1 only, with version 1.0.0 as the latest file, first published on 2026-05-06. It needs to be installed only on the server; players join without it.
Key features
Per-chunk block limits
Each configured block type has a maximum count allowed in any single chunk, for vanilla and modded blocks.
Placement refusal
Placements above the limit are cancelled and the item is given back to the player.
Admin reports
Rules can send a notice to listed admins when a limit is exceeded, only those who are online.
Creative exemption
A config switch decides whether creative mode players bypass the limits or are restricted too.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Keeping lag down on busy servers
Server owners can cap blocks that build up heavily in one area, such as hoppers in a farm-heavy chunk.
Limiting modded machines
Machine blocks from other mods can be capped by their registry ID, without changing the mods themselves.
Who it’s for: Server owners and admins of NeoForge 1.21.1 servers who want to limit how many of a block type a chunk can hold. Single-player players have no use for it.
How it compares
Limit blocks for players is also a NeoForge 1.21.1 mod, released under the MIT License and open source, but it is set up for client and server together, so players need it installed too. Frogs Custom Scaffolding limit is a NeoForge 1.21.1 option that works on client and server together, is not open source, and is released under All rights reserved. BlockLimit runs on the server alone and is released under the MIT License without being open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| BlockLimit | NeoForge | 1.21.1 | Server-side only | 2026-05-06 |
| Limit blocks for players | NeoForge | 1.21.1 | Client and server | 2025-12-09 |
| Frogs Custom Scaffolding limit | NeoForge | 1.21.1 | Client and server | 2026-08-30 |
Questions
Does BlockLimit need to be installed on the client?
How is a block added to the limit list?
Which loaders does BlockLimit support?
In the catalog
BlockLimit is one of 3,545 Optimization mods on ModsFinder, and one of 1,250 Optimization mods for NeoForge. 32,366 mods support Minecraft 1.21.1.
Similar mods
What the author says
When a player tries to place a block above the configured limit, the placement is cancelled and the item is returned to the player. Features Limit specific blocks per chunk Supports vanilla and modded blocks Server-side only Configurable limits Optional admin reports Returns the block item when placement is blocked…
Official listing
- Modrinth page
- modrinth.com/mod/blocklimit
- Owner
- ThisisBoar
- Published
- 2026-05-06
- Updated on Modrinth
- 2026-05-06
- Facts verified
- 2026-10-15