If you are suing in Small Claims, you can ask for up to $10,000. Ask for that full amount in your claim, and the Court can award you whatever amount it believes you were able to prove.
Since he is unlicensed, you can ask for every penny you paid him and the costs to fix or complete the work he was supposed to do. You can ask for additional penalties and depending on the proof you provide to the Court, you might get them.
Generally punitive damages are not available in small claims, but a statutory penalty is recoverable. Put the full amount you seek in your complaint.
Good luck to you.
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