Design a site offline and then go live when ready


I have a website that is not a Wordpress site. I want to create a Wordpress site to take it's place. I am in the process of creating the new site with a different domain name for the purpose of development.

Once the new site is ready, is there a simple way to point the domain name to the new site?

Both sites are on the same server so they have the same name servers.

Any suggestion would be really appreciated!

Armand Girard