Can you do a breast lift and augmentation at the same time?

Thank you for the question.
Whether the breast lift and augmentation should be done the same time  is not a question agreed-upon by all plastic surgeons. There are good plastic surgeons who will insist on doing the procedures separately and there are good plastic surgeons who can produce excellent outcomes in a single stage.
The combination breast augmentation / mastopexy surgery differs from breast augmentation surgery alone in that it carries increased risk compared to either breast augmentation or mastopexy surgery performed separately. Furthermore, the potential need for revisionary surgery is increased with breast augmentation / mastopexy surgery done at the same time.
In my opinion, the decision  to do the operation in a single or two  staged fashion becomes a judgment call made by a surgeon after direct examination of the patient.  For me, if I see a patient who needs a great degree of lifting, who has lost a lot of skin elasticity, or  whose goal is a very large augmentation then I think it is best to do the procedures in 2 stages (in order to avoid serious complications). However, doing the procedure in one stage does increase the risks of complications in general and the potential need for further surgery. This increased risk must be weighed against the practical benefits of a single stage procedure (which most patients would prefer).
Conversely, if I see a patient who requires minimal to moderate lifting along with a small to moderate size augmentation (and has good skin quality), then doing the procedure one stage is much safer. Nevertheless, the potential risks  are greater with a 1 stage  procedure and the patient does have a higher  likelihood of needing revisionary surgery.
I hope this, and the attached link, helps.

Yes you can, some surgeons will prefer to stage the operation to reduce the complciations but it can be done in one stage as long as the patient understands the risks and benefits

Yes, and this is frequently done. It is also noted in the literature that the combination of breast lift and augmentation has more complications and need for revision than either done separately. In other words there are technicalities and complexity to this operation that make it more difficult than doing either operation separately. For this reason, some plastic surgeons prefer to do one or the other first, often the lift.  When all the skin flaps have healed, then  the augmentation is done. In some cases where the need for a lift is borderline, for example when the nipple is just at the level of the inframammary fold, the augmentation can be done first, and the need or desire for a lift decided later. Often the lift will not be felt to be needed.Personally, I prefer to do them both at the same time except in borderline cases. However, the patient has to be informed that there is a not insignificant risk of needing some form of revision, either for symmetry, nipple position, re-stretching of skin, loss of roundness of the areola, or for any of the reasons that revision is needed for breast augmentation.  If patients understand and accept this, then it is OK to proceed with simultaneous augmentation and lift.The operation is usually designed to minimally interfere with the blood supply to the nipple/areola as partial or complete loss of nipple/areola is the most feared complication of breast lift and reduction surgery for most plastic surgeons. Breast lifts on patients who have had previous subglandular augmentations are the most prone to circulatory problems of the nipple/areola, although that is a different topic.