I own a water mitigation company in Fairfield County, Ohio. If I were to use a mechanic's lien, would I be a general contractor, laborer, or equipment leasee? We do not have a general contractor's license because we do not install or construct anything or do any kind of plumbing or HVAC repairs. We perform water extraction, demolition (drywall, floor coverings, and trim/cabinets), cleaning, and setting drying equipment for multiple days to dry the structure. We have the IICRC certifications needed to perform this kind of work.
It's easiest to answer this question by thinking about who you contract with for the particular project (keeping in mind that your classification can change based on different projects and different contracts).
If your contract is with the owner, then you should think of yourself as a contractor.
If your contract is with the general contractor, or a subcontractor, then you should think of yourself as a subcontractor.
A laborer you should generally think of as an employee of a contractor or subcontractor.
Then the other possibility is a material supplier, which you can generally think of as an entity that only supplies items but doesn't perform any labor on the project.
You should fit into one of these categories, and you can just use that designation (contractor, subcontractor, laborer, material supplier) in your lien. There is no need to get more specific (drywall, electrical, water mitigation, etc.).