I just built a seperate building for my bakery. The cost was about $7500, not including the equipment. I already had the equipment from my previous bakery. I had bought some property that had a house on it but did not want customers in my house, that is my private domain. Where I live I did not have to have all commercial equipment, however I was required to have a 3-compartment sink, a seperate hand sink, a vent-a- hood for over the ovens, fire extinquishing, etc. I use stainless prep tables, have seperate freezers and refrigerators and proofers. I have a seperate water heater for the bakery. I do not have restrooms as I am not selling retail items from my shop. I strickly do custom orders and they just pick them up, or I deliver. I use stainless bakers racks for dry storage, and stainless shelving for food items. I have a seperate area for all my cake decorating stuff, which we put in peg board covering the decorater area, this way I can hang alot of stuff. I made sure I had plenty of additional counter tops in case I had more then one project going. As the others have said you'll have to check in your area for the requirements, but planning is crucial. Its a big step to start a business, just make sure you have all your ducks in a row. It would be a shame to go to the expense of building a place and find out later you can't do it. Check your zoning ordinances also. Lots of Luck to you.