Higher Nether Max Build Height

Name: Higher Nether Max Build Height
Author: anonymous123-code

Higher Nether Max Build Height raises the build limit in the Nether dimension, so players can place blocks higher than the vanilla ceiling.

FabricForgeQuiltServer required, client optionalCC0 1.0 UniversalOpen source1.20.1

What it does

The mod extends the Nether's maximum build height by 64 blocks, bringing the top limit to 320 blocks. It also adjusts the maximum portal and chorus height so those features reach the new ceiling. The changes are made through a data pack and work with Incendium Legacy, which the author tested with version 5.3.1 of Incendium for 1.20.1. The server must run the mod, while a client may leave it out. Builds are published for Fabric, Forge and Quilt, all for 1.20.1, under the CC0 1.0 Universal license, which places the code in the public domain.

Key features

Taller Nether ceiling
Builders can place blocks up to 320 blocks in the Nether, 64 blocks above the vanilla maximum.
Portal and chorus height
The maximum height for Nether portals and chorus plants is raised to match the new build limit.
Incendium compatibility
The author notes testing with Incendium Legacy 5.3.1 on Minecraft 1.20.1 and lists it as an optional dependency.

Compatibility

Latest build for each game version and loader.

1.20.11.0.0+1.20.1+mod1.0.0+1.20.1+mod1.0.0+1.20.1+mod

ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Requirements

Dependencies declared by the latest file for each loader.

Optional 1

Incendium LegacyA nether biome overhaul combined with challenging structures to conquer, unique weapons to obtain, and tricky mobs to defeat.

Optional

How it compares

Full comparison

Amplified Nether Height is a server-side mod that also changes Nether height, released under the MIT License and open source. Higher Heights is a data pack with a separate scope, under the MIT License, but it is not open source and is published for 1.17 – 26.3. Nether Tweaks is server-side only and open source under the MIT License, targeting 1.20.1.

Mod	Loaders	Game versions	Environment	Updated
Higher Nether Max Build Height	Fabric, Forge and Quilt	1.20.1	Server required, client optional	2023-09-09
Amplified Nether Height	Fabric, Forge, NeoForge and Quilt	1.18.2 – 26.3	Server required, client optional	2026-10-04
Higher Heights	Fabric, Forge, NeoForge and Quilt	1.17 – 26.3	Server required, client optional	2026-09-16
Nether Tweaks	Fabric and Forge	1.20.1	Server-side only	2025-06-20

Questions

Does Higher Nether Max Build Height need a loader API?

No separate API is listed. Builds exist for Fabric, Forge and Quilt, and the mod is published only for 1.20.1.

In the catalog

Higher Nether Max Build Height is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 34,764 mods support Minecraft 1.20.1.