While there are countless mods that may compliment Sim Settlements 2 well, we want to highlight a small handful that can vastly improve your building experience.
We will not be adding any add-on packs or other mods which add building assets to your workshop to this list. The intention of this list is to avoid popularity contests or subjective measurements. The mods below simply add extraordinarily helpful functionality to the workshop or fix what is broken/limited by Fallout 4 itself.
Unofficial Fallout 4 Patch - Fixes bugs in Fallout 4 that Bethesda did not. Always recommended at the top of your mod load order.
Buffout 4 - Fudgyduff - It fixes engine bugs and adds a crash logger to the game. Helpful for determining why your Fallout 4 crashed. Recommended for all PC players.
Installation Guide for Buffout 4 - A shorter version of the Buffout 4 Guide below.
Buffout 4 Guide by TheSoundOfSnow for more complete mod requirements, installation instructions and information about using the mod.
Faster Workshop - Workshop Lag Fix – Drastically decreases the time it takes for Workshop Mode to load. Particularly helpful if you have numerous mods that add assets to the Workshop menus. Requires F4SE.
NOTE: Should not be used with Buffout 4. (Buffout 4 includes this fix).
Interior NavCut Fix by Snapdragon (Requires F4SE and Address Library for F4SE Plugins by Fudgyduff):
Fixes the engine bug that causes workshop navmesh cuts to persist throughout all interior cells, as reported here: https://simsettlements.com/site/index.php?threads/major-new-fallout-4-bug-discovered-shared-interior-cell-navcutting.26755/
Baka ScrapHeap – Increases the Fallout 4 script data memory limit. Requires F4SE.
NOTE: Generally you will need this if you add a mod and it causes an infinite load screen when loading a save. If Buffout 4 is being used, additional edits to Buffout 4 ini files are required. Please read a Buffout 4 guide.