A subcontractor is a person or company that is hired by a general contractor or main contractor to perform a specific task or set of tasks as part of a larger construction project. The subcontractor is responsible for completing their work in accordance with the terms of the contract, and they typically work independently of the main contractor.

Subcontractors may specialize in a specific trade or type of work, such as electrical work, plumbing, or HVAC (heating, ventilation, and air conditioning) and they are hired to perform specific tasks on the construction site. This allows the main contractor to bring in experts in specific areas, while they themselves can focus on the overall management and coordination of the construction project.

Subcontractors are typically paid by the main contractor and not by the owner of the property. Subcontractors are generally considered self-employed. They are responsible for their own taxes and compliance with laws, regulations, and industry standards related to their work.

It's worth noting that when a subcontractor is working on a construction project, the general contractor is responsible for ensuring that the subcontractor's work is completed in accordance with the contract and that it meets all relevant building codes and safety standards. The subcontractor is responsible for obtaining all necessary permits and licenses, and for obtaining any required insurance. Due to the nature of the work, the subcontractor agreement with the main contractor is of utmost importance, as it will contain the details of the scope of work, the payment terms, and the responsibility and liability in case of any accidents or defects on the work.