You don't like your neighbor planting tree's on his property?
Simple solution.....
MOVE!
Or, simply cut off any branches that extend over your lot ~ lawful everywhere in America if not in most of the world.
I’ve got a good neighbor. He didn’t love the big old willow trees in my yard shedding all over the place but he never complained. Xourse after a storm I usually cleaned up the mess they left in his yard first.
He did say that he was thinking about having a party when I cut them down.
In fact Gibson planted the cypress trees to replace shade lost on his driveway and garage after the $65,0000 solar guy cut down his own large oak tree (probably to accommodate and facilitate his “cheap” solar power decision).
Anyone buying his house is not going to value that solar system an extra $65,000. If he wants to move sometime in the next 15 years he will take a bath.
It's hard to predict the future. Justifying the cost of putting in a heat pump has the same problem. A home buyer won't value it enough to make it worth it.
Or buy up all his neighbors so he can bulldoze everything.
I bet those new trees are helping with the neighbor's electric bill so is he going to help offset their costs? Just this morning, I watched the neighbor clip some of my limbs over on his side of the fence but didn't say a word because that was his side. A few weeks ago, I clipped some of his growing over my property. I don't tell him what he needs to do on his side and he shouldn't tell me what to do on mine.