While is is correct that many areas do not require a permit or inspection for improvements under a certain dollar amount, they almost ALWAYS require it if there is plumbing or electrical work involved. For instance, the rule will read: A permit and inspection shall be required for improvements costing over $500.00, OR ANY improvement involving plumbing or electrical work. This is also true of licensing requirements in my state. An unlicensed person may perform work under a certain dollar amount, UNLESS it involves plumbing or electrical work. The local unlicensed handy persons do not seem to ever read past the word "unless".