Employees with privacy when they need (e.g. private office space) are 1.7 times more likely to be engaged in their work than other employees.
Employees with flexible worktime or a personal workspace are 1.4 times more likely to be engaged.
And employees with a door they may shut are 1.3 times more likely to be engaged.
HR Magazine “Office Space” December 2017/January 2018; Source: Gallup