No surprise: it depends. It's best to let us talk about the scope in a short call, then we can give you a concrete assessment.
So that you have a rough guide:
Most multi-page website projects, where we support the entire process, are between €10,000 and €25,000.
A one-pager usually costs around 7,000 euros.
The development of individual landing pages in an existing project starts from €2,000.