The questions people actually ask, in the order they ask them, determine the structure better than any template. What do you do. Is it for somebody like me. How does it work. What does it cost. Why should I believe you. What happens next. If your pages answer those, the site is complete regardless of how many there are.
For a typical service business that resolves to a home page, a page for each service you genuinely offer, an about page, a contact page, and a privacy policy. That is the core, and it is sufficient to launch. A business offering one service needs fewer. A business offering four needs a page for each rather than one page listing them, because a combined page ranks for nothing in particular and makes the reader find their own situation.
Add pages as you accumulate reasons rather than in advance. A frequently asked questions page once you notice the same questions recurring. Case studies once you have work worth describing. Pages about areas you serve if you operate across several and have something genuine to say about each. Each addition should be traceable to something that actually happened rather than to a sense that a proper site has one.
The pages that reliably underperform are worth knowing so you do not build them first. A news or updates section that will not be maintained. A team page for a business of one. A page listing every industry you could theoretically serve. A gallery with no context. Each looks like substance and produces nothing, and the abandoned version of each actively damages the impression.
Resist the instinct to consolidate everything onto one long page, which is the opposite error and equally common. A single page covering all services cannot rank for individual searches, cannot be linked to specifically when somebody asks about one thing, and forces every visitor through material irrelevant to them. Separate pages let each one answer the question somebody arrived with.
Depth matters more than count once the core exists. A site with six pages that genuinely answer their questions outperforms one with twenty thin ones, and search systems have become considerably better at recognising the difference. If you are choosing between adding a page and improving an existing one, improving is usually the better decision in a first year.
Keep the navigation shorter than the page count, which sounds contradictory and is how good sites work. Five or six items in the menu, with anything else reachable from within the relevant page or from the footer. A menu that requires reading delays the decision you wanted the visitor to make.
Then check what each page is actually doing after a few months. Your analytics will show pages nobody visits and pages that produce enquiries, and the distribution is usually more uneven than expected. Pages producing nothing are candidates for removal or consolidation, and pages producing enquiries deserve the attention you were about to spend building something new.
Publish fewer pages properly rather than more pages partially, and finish each one before starting the next. Half built pages accumulate quickly and every one of them is visible to visitors and to search engines, which means an incomplete site is not a work in progress from the outside. It reads as abandoned, and that impression costs more than the missing pages would have earned.