For landscape shading to be successful it must be planned very carefully. Trees must be placed in just the right position for them to be able to provide shade at the time its most needed. Thought should also go into the kind of trees you will use. If you are looking for a lot of shade then you will need to select a denser tree. Another thing that is important to consider is whether you want the home to benefit from the suns heat during the winter months. If this is the case, then a deciduous tree will be the best option as it will provide full shade in the summer but lose its leaves in winter, allowing the sun to reach the home.
Some points to consider. Remember that it will take some time for trees to reach their full height so you may not see immediate results and energy savings. If you want a quicker result, vines are a good choice as they can be wrapped around a trellis or fence and provide good shade. Shrubs are another good option, particularly if you want to shade a pathway or driveway.
So, the homes landscaping can be used to save on indoor energy costs but first its good to consider what the planting of extra trees will mean for moisture levels etc. on your property.