"That depends on a few things: what kind of house you have (one story, two story, etc.), the architecture, and what you hope to accomplish. You'll also need to consider growing conditions (do you have full sun, part shade, full shade?). What is the soil like? Without knowing these things, I can only give you some general suggestions.
First off, for safety, you'll want to plant small species (those with a mature height less than 25 feet) at least 8 feet from the house. Larger species (those growing over 25 feet at maturity) need to be at least 15 feet from a structure.
If you're looking for shade, then you might look into oak, maple, sycamore, linden, tupelo or sweet gum. If you're looking for a tree with architectural interest, then consider a weeping tree or perhaps something pyramidal in shape.
For specific ideas, check out our Plant Encyclopeda. Also visit the National Arbor Day Foundation at www.arborday.org.
Luke Miller, editor
Garden Ideas & Outdoor Living magazine"