Has anyone had their property taxes go up because of adding rainwater collection systems and solar panels to their existing homes?
No good deed goes unpunished!
FWIW, here in NY state, it's illegal to raise the value of a place for assessment purposes because of AE equipment . . . . . UNLESS . . . the taxing municipality has specifically precluded this provision. I'd guess most don't even know about it; much less bother to preclude it since it's overall impact to the tax base will be nearly zip . . . .
I had ~ $30k of AE equipment ( including PV panels ) a few years back; and it does not appear that my tax assessment has gone up due to that . . . .
Your mileage may vary . . . . in a different state . .. .
Ain't that the truth!