If you are a web designer and have been given a project to design a new site for someone you need to try and find out as much information as you can about what it is they want? Firstly try and find out about their existing branding, do they have a logo, have they got certain colour ways they want to use? They may already have this but be looking to change everything in which case I would suggest quoting for a rebrand first of all then the website designs as a separate job.
When ding the designs be carefully to not spend too much time, especially on one design until you have had some feedback from your client. You may find that they have little idea of what they want, but when they see a visual for the first time will instantly be able to tell you what they like and what they don’t like. It may be worth showing them a draft visual of the home page and then once they are happy with that start to visualise a few other important pages such as a product page. When costing the project try and specify how many visuals you will create.