Accessibility and the area of universal design are subject to a number of rules and conditions. The purpose of the rules regarding accessibility is to enable as many people as possible to participate in society on equal terms. The built environment should be possible to use for both people who have full mobility and people who use, for example, a wheelchair, walker or cane. People with impaired vision, hearing impairment or other orientation impairment should also be able to use the built environment. If you are planning to build or change something, it is your municipality that can tell you what you can or must do. It is the developer who is responsible for compliance with the rules.