California Window Tint Laws (2026): Legal Limits Explained for Agoura Hills Drivers

Window tint is one of the most common upgrades we do, and one of the most misunderstood when it comes to what’s actually legal. California has specific rules about how dark and how reflective your tint can be, and they’re not the same for every window. If you’re in Agoura Hills and thinking about tint, here’s an accurate, plain-English rundown of the law so you can make a choice you won’t regret at a traffic stop.

These rules come from the California Vehicle Code, primarily §26708. We install to legal spec and advise you on it, but the summary below is general information, not legal advice.

Front side windows: more than 70% VLT

The key term is VLT, visible light transmission, the percentage of light a window lets through. A higher number means a lighter, more see-through tint; a lower number means darker.

In California, your front side windows (driver and front passenger) must allow more than 70% of light to pass through. In practice, factory glass already blocks a little light on its own, so any film you add to the front side windows has to be very light to keep the total above that 70% threshold. There are tint films made specifically for this, often clear or nearly clear films that reject heat and UV without darkening the glass much. That’s the legal lane for front side windows.

Windshield: only a strip at the top

You cannot tint the full windshield. California allows tint only on a strip along the very top of the windshield, down to what’s called the AS-1 line, a manufacturer’s mark etched into most windshields. If your windshield doesn’t have an AS-1 line marked, the rule of thumb is the top four inches or so.

That top strip is meant to cut sun glare without obscuring your view. The rest of the windshield has to stay clear.

Rear side windows and rear window: your choice

Here’s where you get freedom. The rear side windows and the rear window can be tinted as dark as you want, any VLT, as long as your car has dual side mirrors (one on each side). Virtually every modern car does, so for most drivers the back glass is wide open. Want limo-dark in the back? That’s legal in California.

This is why you’ll see cars with light, barely-there front windows and much darker rears, that’s the law shaping the look, not an inconsistency.

Color and reflectivity rules

A couple more limits worth knowing:

• No red or amber tint. California prohibits tint in those colors. Stick to neutral shades.
• Reflectivity is limited. Tint can’t be excessively reflective or mirror-like. The film should reduce light, not turn your windows into mirrors. Highly reflective and metallic-looking films can run afoul of this.

Medical exemptions exist

California does allow medical exemptions for drivers with certain conditions that require greater protection from sunlight, which can permit darker tint on windows that would otherwise have to stay light. This requires proper documentation, it’s not something you simply ask for. If you think you qualify, that’s a conversation to have with the right paperwork in hand.

Why installing to legal spec matters

It’s tempting to go darker than the law allows up front, but it’s not worth it. Illegal tint can mean a fix-it ticket, the cost of removal and re-tinting, and the hassle of a stop that didn’t need to happen. The good news is that modern film, like XPEL Prime XR Plus, can reject a lot of heat and UV without going dark. You don’t have to choose between a legal front window and real comfort, a quality ceramic film keeps you cool and compliant at the same time.

We install to California legal spec by default, and we’ll tell you exactly where the lines are before we cut any film. If you want the maximum legal look, we’ll dial it in: light, high-performance film up front, and as dark as you like in the back.

The quick reference

For a standard California passenger car:

• Front side windows: must let more than 70% of light through (very light film only)
• Windshield: top strip only, down to the AS-1 line (roughly the top four inches)
• Rear side and rear windows: any darkness, as long as you have dual side mirrors
• Color: no red or amber
• Reflectivity: not excessively reflective or mirror-like
• Medical exemption: available with proper documentation

If you’re in Agoura Hills and want tint that looks right and stays legal, we can help. Explore our window tint service and our window tint work near Malibu, or contact us with questions. We reply the same day, usually within the hour.