One of the most amazing things upon arriving in SF was how many ugly and dangerous power lines were strung all over the bay area. I grew up in a much poorer area but we still had underground lines. Everyone knew to call the electric company before digging, it wasn't an issue at all.
This course of action appears to be a result of a recent wildfire that may have been caused by PG&E power lines
Everybody seems to think that burying power lines is a walk in the park. It unfortunate the the conditions have changed were it is now necessity.
Shouldn't confuse the issue with things like unintentionally starting fires which has other solutions.
In theory your houses 'share' would only be the additional cost of the distance out front to put underground, which you should get back on re-sale.
Plus a neighbourhood of beauty and the ability to plant large trees.
It has a cost, but I think people often pay more for less in communities.