Each and every project is unique with a different set of client requirements, scale and complexities and therefore each has to be assessed and evaluated before an appropriate fee structure can be presented. Typically there are 3 types of fee that could be adopted:
Fixed Sum - This is more often the preferred option for both myself and the client because it gives certainty and everyone knows where they are with cost. However, to be able to provide a fixed cost it is important to understand clearly, at the outset of a project, the detailed scope of work and services required along with a detailed brief from the client. Or,
Hourly/Daily Rate - Used when it is difficult to get to a fixed fee position because the scope of works cannot be defined early on as the project is too 'fluid' or perhaps where a client wants to use my services on an as and when required basis. Rates can vary depending on the type and scale of project but as a guide allow £40/£50 per hour. Or,
A combination of both hourly/daily rate and a fixed sum - An example of when this might be used would be where at the start of a project the project parameters are not clear and therefore an hourly/daily rate is used and only when the scope of works and design have more direction then a fixed fee for the remaining works can be agreed.
I look forward to discussing your project!