Forehead hairline lowering; is it permanent?

Hello,It is hard to find doctors for forehead lowering since they need to be experts in 2 areas.  First of all, doctors need to be experts in facial plastic surgery or plastic surgery to lift up the scalp area and advanced along the forehead.  The galea is released during this.  A key component is hiding the scar along the border of the scalp.
The second component is being an expert in hair transplantation.  The hairline is lowered and the scar is camouflaged through hair transplants. 
Look for a surgeon specializing both plastic surgery of the face and who does hair transplants.
Best, Anil Shah 

best treatment I have used is tissue expansion of your hair bearing skin to replace the nonhairbearing skin.  A simple advancement of the scalp maybe an alternative to the two stage procedure of scalp tissue expansion. Good luck

yes this is permanent. If you are a male however and you have hair loss then you will have an exposed scar. If you are female only one procedure and you are finished. The scar should not be seen because hair grows through the scar and not behind it. 

You can lower your forehead but how much depends on how much scalp laxity you have and what  your hair distribution is.  For men, as mentioned before, a receding hairline will expose the significant scar.  And in women, it should be camouflaged by the hair growth if done in the most meticulous way possible... and it is permanent in women and they don't have problems with hair loss down the road.