Yes, three story house plans can in fact be a highly practical choice, especially if you're working with a narrow lot. As land become more and more scarce, building up rather than out is often the best and smartest choice a homeowner can make.
That said... 3 story house plans are also just plain cool! Consider the amazing views you could enjoy while lounging on a third story viewing deck. What's more, three story house plans often feature deluxe amenities, like spacious closets and large kitchens. Some 3 story house plans even present sweeping staircases that take you all the way up to a third floor, where extra bedrooms, leisure space, and outdoor living await. Other three story house plans devote the ground-floor level to garage and storage, with primary living and sleeping spaces on the floors above — a great way to take advantage of a hillside lot. To move between floors easily, consider selecting a 3 story house plan with an elevator (check out our collection of plans with elevators, or consider modifying your three story house plan to include one). This is a great way to make your plan ready for aging in place.