In short a website is a MUST for any tradesman.
You need a web presence because a lot of the local listings like YELL.com, Applegate, google etc will trawl your pages - then list and rank your website.
That means when customers search (and they do!) for good tilers is a useful reference point.
Its a fairly cheap way of advertising, you can make instant updates (unlike printed adverts) You can add photographs of work. Your customers can read about you.
A simple site is going to be fairly cheap to do. Its also really easy to explain to people on the telephone about your company.
For example Professional Builder magasine ran a piece on my company in print but used all my online content to produce the article. I didnt have to do a thing !!
All because I have a website. So yes get a small site. Add some content.
Good luck !