If your state of operation is California, the
2006 CA Law Book shows all of California's State Liscensing Board
(CSLB) requirements.
Contractor licensing requires equivelant 4-yrs JW experience, proof by a vouching contractor, and surety-bond deposits to CSLB for $12,500 + $$7,500 for each managing employee (ie) forman, etc... Some members of "Joint ventures" are exempt from the Lic. requirements.
CA prohibits the LLC entity for any contractor, waives gen.liab.insurance if bonded, but enforces Workers comp. Ins, if the single-person exemption is not filed. The example contracts (above link) shows consumers must be given "
Intent to Lien" notice before work begins, or liens are not enforceable.
Further CA-consumer protections prohibit contractors from receiving any money or down payment before work is complete, or from collecting on change orders without owner's signed authorizations.
The extensive details and notices CSLB requires on the written contracts is too extensive to cover here, you have to see it to beleive it. (above link). CSLB website constantly reminds, beggs, and plasters links everywhere, for consumers to report anyone operating without a license.
Hidden deeply under all this, there is a minor exception for "Home Improvement" handymen (different set of requirements) if they can operate under $500.00 per project, including total labor & materials (see "Home Improvement" section of above link).
A local insurance agent said institutional clients can require contractors to plug their exposure and demand more coverage, including comm. vehicle policies. His average rate for the un-licensed "Home Improvement" (Handyman) policy runs about $1500.00 per year, for $300K in coverage, but this is void if claims fail CSLB requirements for the "Home Improvement" catagory, (must be < $500, with proper notice, permits, etc..)
When I asked what a $2 milion policy would cost, in my area, for a new contractor that wouldn't gross more than $5,000 the first year, the agents promissed they would talk with their underwritters, but never returned my calls.
No doubt, $2 million Gen.liability-policy premiums are over $5000 per year in my area, or those agents would have called back. May also explain why CSLB preferes to enforce bonding deposits for licensed contractors, if small operators historically are less likely to maintain such premiums.