If you have totally no idea about web design then freewebs is a good place to start. I actually made and sold a company a freewebs site, and they were perfectly happy with it
Easiest £200 ever.
However if you have a bit more knowledge, wordpress can be a good way to do it. Its primarily for making blogs, but if you buy a nice template then it changes the layout and makes it into a proper site rather than a blog. This is also easier than creating something from scratch and in my eyes looks much more professional.