Can a fat transfer to the buttocks and breasts be done at the same time?

Yes, both procedures can be performed at the same time provided there is enough fat to harvest. I graft down fairly low on the buttocks so I keep people from sitting any amount of time for 1 week.

Thank you for your question.Yes, it is possible to have those procedure at the same time. But first, for safety reasons, to be a good candidate for the procedures you want at the same time, your labs and  cardiovascular preoperative evaluation must be optimal.
Kind Regards,Dr. Emmanuel Mallol Cotes.-

Getting both procedures done at the same time is possible but would result in a difficult recovery period. 

Both these surgeries can be performed at the same time but you will need enough fat for both procedures. This typically means about 1000 cc of good processed fat at least.

To answer this in sequence:
1) surgeons vary as to their recommendations with most advising two weeks off of your buttocks. However, some as you indicate, may suggest longer periods.
2) these surgeries can be performed at the same time but you need adequate & sufficient donor sites as well as breast augmentation through fat injection in the USA remains in its preliminary stages of evaluation.

Hello dear!!
Thanks for the question and provided information as well.
It is safe to combine these procedures, if your health and lab tests results allows it. I suggest to book a consultation with a board certified plastic surgeon, to discuss the best options for your goals.
Good luck :)