A quick review of the California Business and Professions Code section 7031 shows that unlicensed contractors are prohibited from taking legal action to enforce contracts for services requiring a valid contractor license – so if they don't have a license, they can't sue you!
Illegality. It is illegal to hire a person who is not licensed to perform construction work on a project, unless the person is not required to be licensed. See Utah Code § 58-55-501(3).
Unprofessional conduct. 58-55-502. Unprofessional conduct. failing to continuously maintain insurance and registration as required under Subsection 58-55-302(2).
File a complaint: Depending on your state's specific laws, you can file a complaint with either your local contracting or licensing board or with a consumer protection agency. Be prepared for legal action: If you go ahead and file a complaint, be prepared for the potential of legal action.
Planning to do construction work in Utah? You'll need to get a contractor's license. In addition to protecting your business, a Utah general contractor's license can boost your profit potential by helping you land bigger jobs. Without a license, you're limited to projects valued at less than $3,000.
If the value of your work projects exceeds the $3,000 limit, you must have a Utah contractor license. The state takes this seriously, and the DOPL has conducted sting operations to fine businesses which attempt to take on jobs over $3,000 without the proper license.
A Utah handyman license may not be necessary for every job; the state has fairly relaxed licensing requirements for this profession. However, you will need a contractor license to take on larger jobs. And it's up to you to know the legal requirements for any project.