Kisarau Architect, LTD. Curved staircases are always more expensive, but if you just round-off the first 3-4 steps, you can still get a great effect.

Summit Stairs & Millwork You typically design curved stairs or stairs with "bowed" treads on an AutoCAD design program. I do the design work here. It does cost more due to the amount of additional wood you use to glue up your tread blanks and the labor as well. Any competent stair company can give you the design and a firm price prior to starting your project.