CurseForge · Minecraft mod
Huge Structure Blocks [Fabric & Forge]
Structure blocks. But bigger. Up to 512 blocks!
Quick answer
Which Huge Structure Blocks [Fabric & Forge] release matches 1.21.5 Fabric?
Huge Structure Blocks [Fabric & Forge] [Fabric] HSB 1.1.4 for 1.21.5 targets 1.21.5 with Fabric. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.
Where it goes
Is Huge Structure Blocks [Fabric & Forge] required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does Huge Structure Blocks [Fabric & Forge] [Fabric] HSB 1.1.4 for 1.21.5 need?
[Fabric] HSB 1.1.4 for 1.21.5 on 1.21.5 Fabric. Every mod below is checked against that same setup.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add Huge Structure Blocks [Fabric & Forge] without breaking your instance.
Built for Huge Structure Blocks [Fabric & Forge] [Fabric] HSB 1.1.4 for 1.21.5 on 1.21.5 Fabric. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use [Fabric] HSB 1.1.4 for 1.21.5. It targets 1.21.5 with Fabric; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside [Fabric] HSB 1.1.4 for 1.21.5. It opens that exact file at the source.
About this project
What does Huge Structure Blocks [Fabric & Forge] add?
Note: I am currently updating old versions to include the new optimisations and limit removals.
Huge Structure Blocks
Huge structure blocks increases the maximum structure block size and corner search radius to 512 blocks. Render of the bounding box is also increased to 256 blocks.
In short:
- Increases maximum structure size to 512 blocks.
- Increases render distance of structure bounding box to 256 blocks.
- Optimises the corner search algorithm
- Maintains a cache of structure block corners that allows for instant resolving.
- Removes the Jigsaw depth limit.
- Removes the 128 block distance limit from structure features/pools.
- Adds a creative item group for structure block items.
HSB's corner search resolves instantly versus Vanilla which takes seconds (sometimes even crashes). This is particularly useful on build servers where players have access to create structures.
Example

Bugs, issues, questions
If you have a question, you should join our Discord: https://discord.gg/fh62mxU.
Bugs, issues, and similar should be reported on our issue tracker.
Project description from CurseForge.
Pick your setup
Huge Structure Blocks [Fabric & Forge] by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.1.2
2 loader builds26.1.1
2 loader builds26.1
2 loader builds1.21.11
2 loader builds1.21.9
2 loader builds1.21.8
2 loader builds1.21.5
2 loader builds1.21.4
2 loader builds1.21.1
2 loader builds1.21
2 loader builds1.20.6
2 loader buildsShowing the newest 12 of 29 game versions. Older files are in the list below.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Huge Structure Blocks [Fabric & Forge] versions and loaders
[Fabric] HSB 1.1.4 for 1.21.5
huge-structure-blocks-fabric-1.1.4.jar
30 Apr 2025
Looking for an older file? The official CurseForge project page is in Resources.
