Are Shared Office Common for Lecturers Are there any standards in higher education (any country) on when lecturers (any level, any field) have a private office or a shared office?

I know it's a good idea to provide 'consultation time' for students as one-on-one teaching helps the student in so many ways. However, in a shared office it seems that some of the benefits of one-on-one teaching disappear. For example, the student is less likely to be concerned about how they look in front of others if it's in a private office but if there are other teachers (perhaps with other students) then your student will have those issues again.

So, are there any standards about private vs shared offices for university lecturers?
You're going to find answers all over the map for this one (i.e., there probably aren't "standards").  I personally like having a private office so I can get the most work done, but I'm generally comfortable with a shared space if it doesn't get too loud.  I have found that it is rare for students to worry about how they perform if they are just trying to get help figuring out the material.  If there are conference rooms or open classrooms available, that's sometimes a good place to tutor students, too.

For what it's worth, I never have closed door meetings with students because that has the potential to lead to allegations of improper relationships, etc.  If a student does have something private to discuss, I'll ask them to take a walk around campus where we are visible but can't be heard, or to go into a conference room that has windows into the hallway.