Office design

I am looking for someone to design an office space for my small business of 1-10 employees. My preference is for an open plan layout but I am open to suggestions. I have a few ideas on what I would like the office to look like but am also open to ideas from the designer. The service I require includes managing the administrative aspects of the office design, gathering information about the office layout, budget and other personnel considerations. Ultimately, the designer should deliver a comprehensive design that meets the needs of my business.