Once you have decided with home improvement service provider than your home improvement service provider can make visit to your home for initial survey and the estimate of the work as well as get an idea about what short of goods require to perform the work. It is the term called Primary Estimate where the budget cost is decided on the basis of primary survey.
I think it is not the final estimate; the Primary estimate is near to the final budget cost. The final charges will be considered after the work performed.