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Step 1
Determine the extent of your CAD needs. If you are designing a simple floor plan or elevation, a two-dimensional program is sufficient. However, if you need blueprint-quality plans with plumbing and wiring diagrams, choose a more professional program.
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Step 2
Factor in the price. Some CAD programs that feature add-on libraries and network with other programs are expensive, but you don't have to pay a lot of money to use a basic CAD program. Google and Sketchup have teamed up to bring you Google Sketchup 6, a free downloadable program that provides everything needed for basic drafting (see Resources below).
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Step 3
Consider an expandable program if you want a wide range of features. AutoCAD, the industry standard, offers a regular and a light version. Other software manufacturers have developed numerous plug-in programs that expand AutoCAD's abilities. Choose from landscape, bridge, decking or other modules (see Resources below).
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Step 4
Try before you buy. Many leading CAD software programs offer a trial version or a demo, allowing you to evaluate the software before you choose.
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Step 5
Compare the features of the leading CAD programs at sites like Houseplanz (see Resources below).
