Small House Plans Small House Plans focus on an efficient use of space that makes the home feel larger. Strong outdoor connections add spaciousness to small floor plans. Small homes are more affordable to build and maintain than larger houses. To see more small house plans try our advanced floor plan search Small Plans At Architectural Designs, we define small house plans as homes up to 1,500 square feet in size. The most common home designs represented in this category include cottage house plans, vacation home plans and beach house plans. A house plan is a set of construction or working drawings (sometimes still called blueprints) that define all the construction specifications of a residential house such as dimensions, materials, layouts, installation methods and techniques.