House plans and custom home designs. It's what we do. We are a leading home design firm specializing in house plans and home designs for the residential customer. Our unique house plans include the elevations, floor plans, drawings and prints needed for you to build the home of your dreams. At Ahmann Design, Inc., we offer home plans that meet every budget, big or small with floor plans that are highly functional. We pay attention to all the details that go into our home designs from the brick details on the front of the house, to the open floor plans inside.