How much will it cost to build a shed in Watertown? Different people will have varied experiences with their contractors. From the cost of materials to the labor cost involved in performing the work, there are a number of factors that you have to think about. Of course, before your contractor comes up with a workable plan for you, you will have to go through the shed plan you desire. Together you will analyze the intricate details and calculate anything else that is required before you can agree on how to proceed. You might also want to consider requesting quotations from other contractors for the purpose of comparison.