The answer to that, is of course yes.
That being said most costs are taken up with designing the website.
Design will include things like how big the font is, what colour, what size titles in a page, whether a page has a centred title and then 3 columns underneath.
All these settings are input in the initial design of the website and then used over and over again, without having to enter these details in every time, in other words globally across the site.
Therefore making a new page when all these settings are in place, is less time consuming and therefore less costly.