Tinted Windows: How Much % is Still Legal?

It depends on the State, They all have different laws
The southern and western states have laws which lets you have more that 30% tinted
Check with your local Department of Transportation or Secretary of State regarding window tinting
From the Factory, it will be stick on, A professional may do it differently

This differs from one jurisdiction to another. Check with your local police - they will know. The plastic sheet tinting is much cheaper, and they have different darkness levels, depending on which windows you are getting it put on. Have a shop do it.

first, need to check on what the laws for tinting are in your neck of the woods. as far as the factory making it darker, they will only add a sheet of tint just like anyone else. the dark window in the back of a minivan or an SUV come from the factory smoked. it is not a film on the glass, the glass itself is darkened, but it is at a preset limit from the manufacturer. any tinting that is done afterwards is by putting a film of tint on the windows. i guess you could spray paint them black, but thats a different story. haha. hope this helps

In general, aftermarket tint is done with the sheets, as they come in various grades, and when done professionally, looks to be a part of the glass, absolutely no bubbles or such, even when placed over defroster lines.

As many have mentioned, legal limits differ from county to county, state to state. However, in most states, it’s illegal to tint the front windshield and the driver/passenger side windows. In Texas you can tint the top six inches of the front windshield. Anything aft of that is fair game.