Would you add a 3rd Bedroom/Office here?

[Aleksey F.]

Hi everyone!

Im renovating half of a duplex. The 1st floor has a living, dining, kitchen, full bathroom. The second floor has 2 bedrooms, full bathroom (attached to the master bedroom) and a big empty space separating the 2 bedrooms. 

Im wondering if I should do something with this empty space... if anything.... I could throw a wall with a door (shown in orange in picture), creating a roughly 8ft by 13ft room that could be a baby bedroom or office. Would you do it? Where would you put the door?

Price is not a factor for as my handyman said he can do it for about 800. Im just wondering if Im gaining more utility and more potential rent.

Thanks! Alex