Being shorted quite a bit of our property & want to re-fence accordingly...

My husband & I purchased a home almost 3 years ago in Sacramento on .57
acre. My husband recently looked up our property lines, measured, and found
out that our longest fence shorts us about 20 feet of depth on one side, and
another long fence is short about 15 feet on another side. Part of this
property "outside" our fence the neighbors have used for 40 years as a
private drive to their home (it is dirt/gravel- with a name & the post office
recognizes it), although I'm told that technically they should enter from a
driveway (never constructed) on the other side of their house (they own 2
acres). Are they "grandfathered in"? What exactly is that? And how can we
have use of all our property which IS OURS? We paid for it & pay taxes on
it! Thank you.

[annjd]

That fence can be removed and you can mark the property correctly.

In fact if you don't do that, they may eventually have rights to keep it through adverse possession.

Or you can all sign some kind of agreement giving them temporary use for a period.