Is it possible to get blepharoplasty on just one eyelid? How much would it cost and is local anesthesia possible? (Photo)

There is no substitute for seeing someone who actually knows what they are doing.  We are unfortunately pretty rare.  The reason is simple. Many surgeons are not really aesthetic eyelid reconstruction specialists.  The do insurance based reconstructive eyelid surgery.  They are not really prepared to perform microsurgery to address small aesthetic issues.  You will not find the surgical skills you need to help you and not wreck you close to home or even necessarily in your home state.  Do not get surgery with the wrong person.
You issue will not be solved with a brow lift, or botox, or filler service. You have a bilateral compensatory eyebrow elevation.  Having a standard blepharoplasty will wreck you.  Standard blepharoplasty removes skin, muscle and fat.  I promise you that whoever agrees to do this will miss what is actually going on.  The effect of the standard blepharoplasty will be Post Upper Blepharoplasty Syndrome (PUBS).  This will result in a droopy, hollow upper eyelid with upper eyelid ptosis.
The real problem here is an early levator dehiscence.  This is the basis for the compensatory brow elevation.  What you need is a procedure I call micro-anchor blepharoplasty. The elevator tendon needs to be identified and the disinsertion needs to be corrected.  You need almost no skin or fat removed.  The surgery is about structure.  By strengthening the elevator tendon, the compensatory brow elevation will relax after surgery.  You have a slight orbital asymmetry but this is not the basis for your aesthetic concerns. My out of town patients who fly in stay in the Beverly Hills area for about 8 days when they travel for this surgery.

From the limited information in the photograph it looks as of the left brow is slightly lower than the right. This may be the reason for the asymmetric lid show. Physical examination would be required to sort this out.

It is possible to perform blepharoplasty on just one eyelid.  It is also common to have minor differences between the eyes and between sides of the face in general.  I would say the difference between your eyes is fairly subtle although you will notice this more than anyone else.  I would not recommend any surgery for you.  Remember that surgical procedures have risk and although not common, I would not recommend taking any risk to alter your eyes.  

ranger2008, thank you for your question.  I cannot be certain based on the one photo you provided but here is my answer.  Your eyes are stunningly beautiful and you really do not have to do anything at all, in my opinion.  You show normal asymmetry of your eyes--your left eye is not a mirror image of your right and that is true of every living person.  If it really bothers you, you could have very conservative upper lid blephs (local anesthesia is an option), either just on the left or on both, depending on your wants and concerns.  I would avoid fillers and I would avoid a brow lift.  Your best option is to see a well-regarded oculofacial plastic surgeon.  Good luck!

You are young and have very beautiful eyes -- you also have mild asymmetry between the lids and the eyelid creases along with your eyebrows.  As was pointed out in a very precise post on this board, you absolutely need a master to help you.  "Standard" eyelid surgery is likely to give you an unfortunate outcome.  After a proper in-person consultation, perhaps you will decide to have surgery, perhaps not.  But no matter what, I highly recommend you only be seen by a master of the field, with the best training, and superior experience.  Run, do not walk, from any doctor who suggests your fix is quick or easy. Seek a board-certified, fellowship trained Oculofacial Plastic Surgeon who is renowned in both Ptosis surgery and Blepharoplasty surgery.  Best of luck and consider your options! Waiting until you are older may be the best choice.  

It is not unusual to have subtle differences in the two eyes and in fact, on the two sides of the face.  Although your eyebrows are a little uneven, they do not need to be lifted.  Your upper eyelids are slightly uneven and it is your left upper eyelid that has a little more "hooding" and although I would not recommend upper eyelid surgery for you, if you absolutely wanted to Make the eyes look more even, you would need an upper eyelid Blepharoplasty(lift) for the left not the right side as you assumed.