Is Bleaching of Teeth Possible if Having Porcelain Veneers?

Veneers are not affected by bleaching; they will be neither damaged nor whitened.  Only the natural tooth structure itself will be whitened by bleaching.  So keep in mind that after bleaching, your teeth may be whiter than your veneers. But if your veneers are whiter than your own teeth to begin with, then bleaching can work to even out the shades.  Best, Dr. Elizabeth Jahanian

While it's usually recommended to bleach first, to get your natural teeth as light as possible, and THEN match your veneers to that shade, it's perfectly safe for you to bleach after your veneers are placed.  Just know that the color of the veneers will not change with the bleaching process.