What Kind of shade tree is best? It needs grow smaller quantity than 30 ft. tall and smaller quantity...
It needs grow smaller quantity than 30 ft. tall and smaller quantity than 15 ft. wide. It's gonna be surrounded by front of a window.
Answers: Japanese maples are good-looking, have color, and several types of palmate leaves depending on the mixture.
Actually you are looking for a large shrub or understory tree next to those dimensions - I would look at dogwoods, crape myrtles, maybe a cherry tree. For an evergreen, you could look at a holly, which grows more slowly. Remember that anything solidly contained by front of a window does provide cover for someone to break into your home or business, though.
Some loropetalum can be something like 30' tall and 15' huge - so read the labels contained by the "understory" or "shrub" area at the nursery - in that are a lot of shrubs that if allowed to grow to their instinctive height, certainly make a clad small tree (I know 30'x15' does not seem small, but it is.) You can also use a Photinia/red tip, depending on your growing zone - it looks deciduous, but it is everygreen - it like lots of sun, though and it can get blackspot if the nouns is too damp.