NOTE: AUTO-FENCING 2 Is a NEW MOD. I'm leaving v1.0 up for research purposes, but the mod's official file is Auto-Fencing 2.
Downloading Auto-Fencing 2 WILL NOT break your saves, and you can use both (although there is no reason to).
Auto-Fencing 2:
Fences now have a Start and End pole! This makes controlling where your Auto-Fences go MUCH easier. Build a Start Pole, then build an End Pole. NOTE: Building an End Pole will delete the nearest Start Pole as the fence is built. You have to then start a new fence.
v2.1 Random Update
Auto-Stockade (Randomized) now has random rotation as well as height, further breaking up the repetitiveness of the stockade wall.
Auto-Junk Walls now place a random Junk Wall instead of the basic one.
Tweaked some numbers.
v1.0 Makes a few changes:
Fences are now in their appropriate category
Auto-Stockade is in Junk Fence category
Added Random Auto-Stockade (see Screenshots)
Auto-Picket is now gated behind Magazine Perk (Beantown Brewery "Picket Fences" Magazine)
v0.5b sets all spawned fences to persistent.
v0.4b is just minor fixes.
v0.3b adds chain link and picket fences
Fences also orient correctly if you rotate the one you build.
v0.2b adds Junk Walls
Requires Far Harbor
Build one, then build another to automatically build a fence.
You'll find them under Miscellaneous Wood Structures:

I have over 200 other mods!