You want a website that looks good and is accessible? You will get best results, if you choose an internet agency that is experienced in the design of accessible websites. Consciously choose a contractor who has carried out previous projects. You find can find appropriate agencies on the website www.biene-award.de. This site lists the winners of the BIENE-competition for accessibility. Some agencies that mainly work with accessibility can be found on www.abi-projekt.de/unterstuetzer.html.
Would you prefer to stay with your current internet agency, even if they have little experience with accessibility? In this case you should obtain tests and advice from a neutral facility.
Accessibility should be mentioned when placing the order, particularly with regard to the functional requirements and system specification. Functional requirements can be used for a request for quotation. Finally the system specification describes how the project shall be realized. It is important, that accessibility is precisely defined in the contract.