Originally Posted by magpie
Try putting it on graph paper, deciding the size of cupboards, tables, ironing surface and a cutting area and then add walking room.
I think this is the way to do it. Decide on your furniture, built ins, etc. Make a diagram/ That will tell you what your space needs are need.
A lot will depend on how much fabric you have, how many machines, and if you plan to have a LA in the room. Sometimes too big is as bad as too small.