The cost of hiring a carpenter varies depending on the location and the project size but in general, a carpenter is hired either on daily wages or on contractual basis.
One should always be ready with their requirement before hiring a contractor or a carpenter. A clear understanding of the interior project always helps. One should also look for inspiration and share references with contractors for the intended work.
The cost of interiors in generally considered per square foot wise for projects but it is also dependent on your arrangement and mutual understanding with the contractor as well as the project size. It can also be on furniture level as well.