We did a new room addition over our two car garage last spring...I’m finally getting settled in and it seems big but I hope to fill the remaining space someday with a longarm. My new sewing space is about 18x24. I was able to put outlets in the floor and ceiling and, once I finish restoring an oak table, I will have three workspaces for machines. I have a Huffy work table for cutting and a large ironing surface. Go big if you can. : )