This is one of my most asked questions. Interestingly, it is one of the most difficult to answer. There are some standard prices which I will list below. But for many cases, the construction of the garment and the alterations needed will dictate the amount of work necessary to perform the alteration. For example, not all dress hems are the same. Some dresses have one layer. Some dresses can have as many as six or more. That is literally altering a dress six times. The pricing must reflect that. The cost difference can be from $25 to $225. Often times I will have the client text me a picture of the garment. Custom design works very similarly. Sometimes we will either draw a composite sketch or gather a collection of pictures to get a clear idea of what the client wants. In essence, If I can see it, I can quote it. Having said that, here are some standard prices for regular, non-bridal or non-formal alterations:
Plain Hem $10 -$15
Jean Hem $22
Skirt hem $35 - $75
Suit cuff $45
Straps $25 - 65
Bust in $45 - $65
Waist in $25 - $35
Taper pants $25
Jacket in$35
Sides in -$35 - $65
Zipper replacement $35 (minimum)