No, as I understood it, it means that this is a part of building design that affects you a lot, either in a positive or negative way. And then in the next field you can describe why you chose this.
For example, if fluorescent lighting bothers you, you select “important”. If you like fluorescent lighting and want it in an office, you also select “important”. If you don’t care about fluorescent lighting either way and the presence of it doesn’t affect you, you don’t tick the box and move to the next subject.