Many factors affect the price of a mural, including the design, the size, how high up a wall it is, as well as other factors like travelling.

When you commission a mural I will do a number of designs for you which are free and individually costed, so that you can see what you would get for your money. I will need detailed sizes, and preferably photos of the space. If I have to do a site visit for an unusually complicated space I may have to charge appropriately for that.
When you decide on a design you like I will then require a deposit of 25%, the rest due upon completion.