Home improvement contractors must be licensed
Home improvement contractors must be licensed unless either, the project cost is less than $300, or no compensation is required or paid before the project is complete. Note that many aspects of the home improvement law do not apply to licensed persons in the specialist trades--plumbing, gas fitting, electricians, HVAC. Those licensees fall under a different set of rules. If a person accepts payment for a home improvement contract before completion of the project, a court can require all money paid to be returned to the home owner, regardless of whether there is any subtantive issue with the work, and regardless of whether it was completed.
Contractors that are licensed as general contractors may perform home improvement work if they follow the rules regarding home improvement contracts and receipts.