I'm in the early stages of a project involving a habitable tidally locked world, this one a fairly Earth-like (large ocean) around a K-class orange dwarf. And using this study for reference, where the planet in question has relatively mild hurricanes.

But while researching the complicated climate and orbital questions, I ran into a much more mundane one -- city planning when the sun is essentially fixed in the sky.

It would be extremely easy for say, a downtown filled with skyscrapers to leave large portions of a city in permanent shadow. Especially close the edge of the day/night side, when the sun is essentially on the horizon. Much less so if a city is built centered under the substellar point and the sun at its zenith (but then you need to worry about whether concerns).

I'm trying to figure out how city designs could account for this, while still avoiding inefficient sprawl as much as possible.

For a few examples of what I mean, a couple of ideas I had so far were:

• Cities/towns in the 'twilight zone' could generally be built on steep slopes facing the sun, hobbit style. Such that no building overshadows the next one up. This sharply reduces how densely one could build though.
• Cities very close to the substellar point would have the sun directly overhead, and so could build more densely with less concern. (Again potential weather issues)

Obviously this is all under the assumption that residents would prefer sunlight to permanent darkness.