One-page websites are hot and popular?—?no doubt about that. But they aren't for everyone or every business. It's easy to want one because they're popular; and if done correctly, yours could be a hit. But make sure you're project qualifies first.

A good candidate for a one-page website is not super-heavy on content. You only have one page to get your point across, and there are only so many animations and tricks you can throw in before they get stale.
 
Plus, most one-page websites are unconventional in their layout. Trying to fit a lot of content onto one page without looking cluttered is pretty tough.
 
Potential uses vary, but some of the most popular candidates for one-page websites are personal portfolios and websites for businesses that sell only a few products or services.
 
If you qualify, make sure your website hits the mark. There are always certain things you have to follow through on when making any website, but the points below are especially critical to single-page websites.
  1. Stay focused
  2. Give the layout a hierarchy
  3. Clear navigation
  4. Go design crazy
  5. Go coding crazy
  6. Get it moving

See : http://goo.gl/K3i8D