When you have a private website that should not be in Google’ search results: you probably need to remove it from the index.
There are two methods to remove a website:
Method #1: add “noindex” on each page and wait for Google to crawl the website back! With this method: it takes 2 to 6 weeks.
Method #2: add “noindex” on each page, register your website in Google Webmaster Tools, and expedite the removal and reduce it to a few hours.