I'm working on the system to add functionality to Water Wells, Decor, Sewers, and Fireplaces, and wanted to share some progress.

Placing a Water Well will give you an indication of which houses it will service. The owners of a house that has access to fresh water will get a mood buff. Since Water Wells require a Stonemason, and thus are mid to late tier structures, there won't be a mood debuff for not having water right away. I'll likely add something so the debuff doesn't hit for some number of days, giving you time to make some Wells before the debuff affects your town.

This system will also be used to add "Beauty" to the town by placing Town Trees, Fountains, Lamp Posts, and other decor. Placing these will also provide a mood buff for the residents of houses near the decor. Townspeople with the "Visual" trait will get an extra buff if their house is near a decor object that adds beauty. There is no penalty for not placing "beauty" decor, so it's entirely up to you how many, if any, you want to place.

Likewise, sewers will use this system as well. Residents of houses with access to a sewer will get a mood buff. Similar to water, the debuff for not having sewers will be delayed to give you time to make them. In this case, it'll likely be tied to how many houses you have. So for example, after placing 10 houses, the townspeople could start wanting sewers.

I'm also working on the heating system, which will give mood buffs if a house has a fireplace. When this is active, fireplaces will start to use wood and coal from the town's resources and running out of resources for heating will produce a mood debuff for residents of houses without proper heating.

All four of these will have overlays that you can toggle on and off when in build mode. Because they're all related and using similar systems I'm going to release them all at the same time. So it'll be a little while before this is live. But I wanted to give you all a heads up that they are on the way. As usual I'll update as progress is made!