Can we include an apartment above the garage?
Maybe. First check ALL your local codes before you do anything else. Separate apartments are almost always prohibited except under specific conditions. Assuming you can get approval, then it will depend on the individual plan. Some questions to consider include whether you want interior access to the unit? If so, where is the door between the units to be located? Do you want separate utility meters? And so on. This is a major customization which we will be glad to discuss with you.