To start with you should compile a list of the possible names. It is likely that there are a wide range of interior designers you could hire who are based in your town or area. Go online and locate four or five names that you can make further enquiries with. By browsing the websites of the firms in question, you should be able to develop a clearer picture of how their services differ.
It can be extremely useful to check out the portfolio of the firms you are considering. If they are a professional company, there should be a page on their website that provides images of their completed projects. It is desirable if the designers can create a wide selection of themes using many different elements. Ask yourself whether you can see similarities in their portfolio and the ideas you have in your mind.
Find out whether the company is experienced with home decor as opposed to corporate projects. Creating a warm residential decor is a different concept that putting together a pleasing work environment. If the companies you contact are not able to show you a portfolio, the best option would be to look elsewhere for a different firm.
To work as an interior designer requires training, qualifications, and certification. Delve into the background of the firm's design team to find out whether they hold the right qualifications and certifications.
One of the most important factors would be to have a good rapport with the individuals that will be doing the work. It should not be the case that your input is ignored. At the end of the day, only you know how you want the finished room or rooms to appear. It would be of great value if there was to be a direct and clear line of communication that can be used to discuss plans and address concerns.
Be aware that the most talented designers may not necessarily belong to a large company. There are those professionals who work from their own homes that can create a perfect living space. Do not focus that much on the cost, searching for the cheapest quotes is unlikely to result in a finished decor that matches you expectations.