Rhinoplasty - Deviated Septum - Singing Voice?

Any surgery that alters the breathing passageway can have an impact on the tone or timbre quality of your voice. As far as improving your singing voice, it could have either a positive impact or a negative impact. If your voice has a positive nasal quality, it could impact it negatively and vice versa. Qualities of singing are related to vibrations throughout the entire upper airway in addition to the vocal cords so any alterations in structure or function can have an impact, possibly better or worse. Therefore, septorhinoplasty should be considered with some serious thoughts on the matter. For example, there is a reason many professional singers have not had nasal surgery. Even altering the appearance on the outside can have an effect on your overall resonating quality and affect your voice. Good luck in your decision.

A rhinoplasty is done for purely cosmetic reasons and is paid for by the patient.  A deviated septum repair is done for purely functional reasons.  The combination of septorhinoplasty can certainly be done together in the same setting under general anesthesia.  Repairing a deviated septum will make the voice sound less nasal and will have more resonance so it is certainly acceptable to repair that at the same time.  Repairing a deviation of the nasal septum usually improves the singing voice whether it be an amateur or professional voice.

It sounds like you have a deviated septum and possibly enlarged turbinates as well. That could certainly create a nasal tone to your singing voice. Surgery to correct the breathing and may also change the tone of your voice, but I would give no guarantee on the singing aspect.