Aside from cost, you’ll want to determine which outdoor addition works best for the purpose for which you hope to use it. Do you want to incorporate the landscaping into the overall design? If so, a patio might work best, as it can be surrounded by trees, shrubs and flowers. Do you want the area to be considered a space separate from the main house? Again, a patio works best here because the foundation can be placed away from the house. Patios also work well for homeowners who have in ground pools and want a space around the area in which to gather, cook out, or relax.