I have no experience of growing trees and no practical knowledge of how deep the roots grow, how far they should be away from a building etc.
But if I had a space big enough to plant a tree it would be a linden (lime) tree. An ordinary looking tree with a tidy symmetrical shape it seems nothing special. Then comes late spring and there is simply no perfume on Earth (the universe?) to match it. Subjective, I know, but ...
There is one at the end of my street that receives no water all summer. The leaves turn brownish in autumn but I can't remember it being totally bare in winter. You'd better check out whether it would be deciduous for you in your area.
Another which you will probably rule out because it is deciduous is Jacaranda mimosifolia. Spectacular, breath-taking colour. I used to come out of my house on the way to work in Cairo early, just to stand in awe before having to reluctantly leave it behind until the following day. In Rome it flowers in spring but apparently all summer in the south of Italy. And certainly in summer in Cairo.
Sorry if these two suggestions don't quit fit the bill but if all other factors are okay it might be worth a comprise on the tree being evergreen.
