There is at least one variety of sugar maple bred to be narrow - nearly
columnar in shape. It would make more sense to have a "skinnier" tree in
your circumstance, since the normal spread of a sugar maple is probably at
least 20 feet on either side of the trunk. I'll try to look up the variety
name. Ok, here's at least one " Goldspire"
http://hort.ifas.ufl.edu/trees/ACESACF.pdf
15 feet across 35 to 40 feet tall - it appears to be wider at the base
branches than at the top, if that is your preference..