The Peter Principle (also the title of a 1969 book by Dr. Laurence J. Peter and Raymond Hull) is the hypothesis that people are ultimately promoted to their level of incompetence.
|Toilet, sink, stove, & not shown a shower!|
People will, if given a chance, attempt DIY projects just above their level of competence!
If you have been inspired by that HGTV program this past weekend take the time to consider your skills.
If that improvement or addition will require a permit and an inspection by the local building officials, follow the required procedures.
Short cuts and skirting the permitting process will eventually have to be dealt with - even if it is when you decide to sell your home.