As title says, Is copying other website layout is ILLEGAL? Some Background: I haven't copied the entire source code, I've written it myself. 40% of coding language is different. Whereas they are using some other old framework, I've made mine with latest bootstrap. However, I've managed to keep the things aligned in the way that it will look similar to their's site. Exact same!. Will it cause legal damage to my site. I have always been so weak in legal things.