No, 35% window tint is not universally legal in Wisconsin. State law mandates front-side windows allow ≥50% light transmittance, while rear windows may use darker tints if the vehicle has side mirrors. Local ordinances, particularly in Dane County, may impose stricter limits. Non-compliance risks citations under Wis. Stat. § 347.43(2)(a).
Key Regulations for 35% Window Tint in Wisconsin
- Front-side windows: Must transmit ≥50% of light; 35% tint fails this requirement statewide.
- Rear windows: Permitted if vehicle has dual side mirrors, but local jurisdictions (e.g., Milwaukee County) may cap tint at 35% or lower.
- Medical exemptions: Require a physician’s certification submitted to the Wisconsin Department of Transportation; 35% tint may qualify but must align with § 347.43(2m).
Local enforcement varies—Wisconsin State Patrol and municipal police prioritize front-window compliance. The 2026 update to Wis. Admin. Code Trans 305.08 tightens certification protocols for aftermarket tint installations, mandating VLT (Visible Light Transmission) testing at certified facilities. Dealers installing non-compliant tint face penalties under § 347.43(5). Always verify local ordinances, as counties like Waukesha enforce stricter rear-window limits.