They condense days or weeks of work into tidy 30-minute segments, creating the illusion that anyone can tackle complex renovations with minimal experience. · as licensed contractors are familiar with these processes, hiring them ensures you arent violating the local codes. · home improvement shows make diy projects look easy and affordable. But professional contractors see the aftermath when diy projects go wrong. Here are some projects where its best to hire a pro. Otherwise, you could be penalized, lose your insurance coverage, and notice a drop in resale value due to unpermitted work. · some diy projects look easy on tv—but in reality, they could be dangerous or complicated for amateurs. · to help you knock your projects out yourself while achieving professional results, we’ve asked a pro contractor about the five signs that are dead giveaways of a diy job. · to help you knock your projects out yourself while achieving professional results, weve asked a pro contractor about the five signs that are dead giveaways of a diy job.