The average cost for spa construction will run between $200 to $450 per square foot based on the following variables:
What is the state of the overall economy and real estate market?
Will it be free standing or an interior renovation?
Will it be classified with a three, four, or five star rating?
What amenities does the client want in the proposed spa?
What type of clientele will the spa serve?
What will be the facility's total square footage?
What area of the country is it in?