Is Laser hair removal Permanent?

The short answer to that is: It depends. Permanent hair removal depends on hair color, skin color, and the strength of the laser treatment as tolerated by the patient. 
There is a big difference between claiming permanent hair reduction and permanent hair removal. Permanent laser hair removal implies that there will be no regrowth, whereas with permanent hair reduction you may seem some regrowth of fine, thin hairs. Patients should expect that after a full course they will need a single booster treatment roughly annually to maintain their results. 
Lasers create a beam of highly concentrated light that penetrates deep into the skin where it delivers a controlled amount of therapeutic heat. This light energy is absorbed by the pigment located in the hair follicles. The laser pulses for a fraction of a second, just long enough to destroy numerous follicles at a time and leaves the surrounding skin unaffected. 
hair laser removal results in a permanent reduction in the number of hairs. It can only address existing hairs. The laser cannot prevent new hair from growing. Hair growth cycles are different, depending on individual factors such as: heredity, hormone imbalances, resistance to insulin, pregnancy, thyroid issues, reactions to medications and aging. 
Certainly, the characteristics of your hair have a major impact on how effective the treatment is. Generally, the darker and thicker the hair the more effective any kind of laser hair removal is. Another variable is the pigment in your skin. All of these issues should be discussed in detail during your initial consultation.Up to 15-30% permanent hair loss may be observed with each treatment when optimal parameters are used.
If you’re researching the internet for permanent hair removal solutions, laser hair treatment has no doubt come up in your search. And while there are thousands of websites claiming that laser hair removal is permanent, it’s just not 100% accurate. Every person’s body hair is different and all react differently to the many methods of hair removal. 
While laser hair treatments will remove most of the hair permanently, it’s been reported that the regrowth is possible and relatively common. However, the hair only grows back at about a 20-30% rate.