Concerned about teeth extraction in order to fix top teeth overjet and bottom teeth crowding. Is this common procedure? (photo)

I would be very leary of having the extractions and it could lead to sleep apnea or snoring problems in the future.  It is possible to widen the maxilla in an adult by utilizing Epigenetic Orthodontics (DNA Appliance) to grow the maxillary bone and then finish the case with Invisalign if needed.In this manner you orthopedically enlarge the bone and  (pneumopedically)   enlarge the airway.

Thanks for providing a photo, it makes your case easier to diagnose.  Yes, it is very common to remove 1 or 2 teeth prior to Invisalign treatment or metal braces.  This creates spaces that make it easy for your other teeth to move into.  Invisalign is great at closing spaces and reducing crowding. An alternative to extracting teeth is IPR (inter-proximal reduction).  This is when neighboring teeth are shaved to create more space.  I would not recommend IPR for your case, based on your photo.Spaces left by the removed teeth may remain for up to 6 months.Good luck to you and I hope this helps.  "Follow" me on Real Self to ask more questions.Sarah Thompson, DMD St. Louis, MO

Removing a set of
premolars is very common practice in orthodontic patients that do not have
enough room in their arch to move teeth back into the position that is needed.
The teeth need somewhere to go when they are being moved, and sometimes the
arch can be too small, so the premolars are removed. This affects your facial
profile as the way your lips lay against your face, and how the outline will be
before and after treatment. The spacing is closed by the time your orthodontic
treatment is completed.

from the look of your two photos, which are not nearly diagnostic, but anyway, I'd say that's about the stupidest thing you could do.   I wouldn't do it unless there's some good reason that I'm missing here. did an orthodontist tell you that?