Copied description from Nexus:
Settler Built Settlements is a simple, immersive answer to all of those questions. All you need to do is build the Settlement Building Supplies(tm) in the crafting menu, leave (far enough away for the cell to unload), and the next time you return to the settlement your settlers will have built themselves some homes, crops, maybe even some defenses. All without you having to lift a finger.
How To Install
Install the framework mod. Make sure to download and have “Settler Built Settlements - Initial Release Plans” BELOW the Framework.
(Porter’s note: the initial plans release has been uploaded as an AIO, due to limited plugins on Xbox)
How To Use
Craft the settlement building supplies in the new Settlement Building Supplies category in the Workshop menu, then travel far enough away for the cell to unload. When you come back, it will be built.
I recommend building the plan before making any changes to the settlement manually or scrapping anything- this mod has no mechanism to detect that you’ve modified the settlement.
FAQ
Kindly check the FAQ on the original Nexus upload for more information about the mod, nexusmods.com/fallout4/mods/84015
Requirements
Requires Settlement Menu Manager (SMM) Far Harbor and Vault Tec Workshop. Plans might have different requirements as such DLC.
This mod by itself won’t have any effect, you need to download the Initial Release Plans to be able to use.
Credits
I take absolutely no credit in this mod, all the work, assets and implementation is property of the mod creator and contributors: WhiskyTangoFawks.
Appropriate credits for plans will be covered on the Initial Release Upload.
Special thanks to WhiskyTangoFawks for allowing the mod to be ported.