English Ivy is highly invasive, as much as it looks nice against brick walls and the like...it also likes to kill trees and spreads out. In WA it's a major problem and is what causes a lot of large trees to topple over during rough summer storms. The ivy essentially weakens the tree and causes rot due to the micro climates it creates. Plus the additional weight causes branches to break and further compromises the tree.
That being said, there's other alternatives to English Ivy if you want a nice climbing effect on your house. There's climbing roses, clematis, jasmine, wisteria, ect but you have to create a trellis for them to climb on. Boston Ivy is an acceptable substitute for English Ivy since it has little suckers to hold onto the wall and doesn't compromise structural integrity. Virginia Creeper's another popular substitute as well since it's like Boston Ivy.