Should new homes be built with solar panels and rain retention systems?

It depends where. I was in Hawaii a while ago and a lot of houses there have solar panels on the roof. Good idea though wherever financially viable.

I agree with solar panels being part of all new construction in the lower 48 at least. Water retention may be pushing a bit at this time except in certain parts of the country.

California, alternates with droughts and flooding, at least that is what we continually see on the news. Yet they have failed as a state to build water retention systems to capture that flood water, for the drought they know is just around the corner.

that would depend on where the houses are and how much sun you get there. the cost of a solar panel system is still too

high that you won't ever recover the cost or be worth it.

Yes to the first, no to the second.

Solar panels would solve a lot of problems, anywhere where AC has become the normal in the summer. Formerly, I would have said that many places didn't really need them, but even in the north summers are hotter and the AC cult has become near universal among the indoor cats of the world

In contrast, rain retention isn't at all a universal problem. You can always tell where conservationists come from; the westerners are obsessed with water, the easterners think landfills matter, and the people in the middle are more worried about environmental toxins.

I think it depends upon how practical it is in the geographic area. It would be great in many sunny states, but there are issues to take into account like nearby terrain and mountains.

It really would be a good thing, yes.

It depends. In sunny, dry areas I would say yes. In Oregon, no.

If you are willing to pay for all that extra stuff.

No.I think solar panels look ugly.