William K. Koska, A Professional Corporation
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Protecting Property, Business, and Reputation Through Focused Litigation.
Our work spans state lines and decades of litigation. We have represented clients in nearly 3,000 cases, including recovering $95 million in a landmark environmental action against the State of California and Aerojet. We also succeeded, at the same time in obtaining Dismissals with Prejudice of all the plaintiffs cases filed in Los Angeles (19) and Sacramento (4). Whether you’re facing a water contamination suit in Middle Tennessee or a Prop 65 enforcement claim in California, we provide direct, strategic counsel.
Environmental Litigation & Toxic Torts
Representing clients in high-stakes disputes over pollution, chemical exposure, water rights, and environmental damage.
We’ve taken on state governments, defended against sweeping toxic tort claims, and litigated environmental harms.
Product Liability & Mass Tort
From lithium battery fires to recalled bicycles, we know product cases inside and out.
We've represented clients across multiple jurisdictions in product defect cases involving serious injury and major financial exposure.
Real Estate & Property Litigation
Resolving disputes involving property lines, title defects, drainage damage, and government overreach.
We represent clients in real estate disputes where the legal issues are anything but routine — from complex boundary cases to high-dollar land use conflicts, including Inverse Condemnation/Eminent Domain matters.
Equine Law
From fraud in horse sales to boarding and injury claims, we bring clarity to emotionally charged cases.
With decades of litigation experience and a personal understanding of the horse industry, we offer grounded legal counsel where it matters. For over 40 years, I have been personally involved in the horse industry, including boarding, breeding, training and selling of horses.
Testimonials
Past Results
$95M
settlement for Malibu homeowners after landslides as part of a cross-complaint against Los Angeles County.
