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Maybe the builders are capable of doing a 10 second web search to discover trees that grow in shade: https://www.thespruce.com/twelve-trees-for-full-shade-326967...?

But how will they deal with snow?

Denver averages 60 inches per year (~150 cm).

There are plenty of trees in Denver - and even more trees up in the mountains nearby where they can get 2x-4x that much snow in a year.

Snow doesn't last 24 hours in Denver.