How much does it cost for a corset to be put in place of a zipper on a prom dress

Hi Megan, So many dresses (and garments in general) have a unique construction, so we ask that you bring the item to one of our Alterations Express locations for an accurate, and no obligation assessment. Please stop by our Niles, or closest Alterations Express location. Our team will give you a free fitting and let you know exactly how much the zipper work will cost. Then you can decide if you'd like us to do the work. Thank you for thinking of us for your alteration project. Kind Regards, Alterations Express

That would be a question best answered by the business itself.