If for some reasons, you want to switch the ownership of a Google+page, you can get it done if the new owner/Google+ user have been a manager of the page for at least two weeks.
If you don't have any manager, you must first invite the person to become a manager, then wait for the person to accept the invitation before you can transfer the ownership rights after two weeks. Only the
owner of a page can transfer their ownership rights.
To transfer the ownership of Google+ Page to another Google+ user, follow me through the steps below:
==> Sign in to plus.google.com
==> Click on "Pages" in the Google+ main navigation. You will see a card for each of your pages.
==> Click "Manage this page" to use Google+ as the Page you'd like to transfer it's ownership.
==> While on the "Dashboard" of the Page, scroll down and click on the "view all managers" link
==> Click the dropdown arrow on the card of the person you want to transfer the Page to and select "Transfer ownership to _name of user_".