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Jon Welner


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Jon Welner is a leading practitioner of environmental law in California. His broad and deep experience over twenty years enables him to solve regulatory problems for clients in virtually every area of environmental practice, including air, water, hazardous materials, hazardous waste, consumer products, traditional and renewable energy, and natural resources. Jon helps clients make sense of the “alphabet soup” of state and federal environmental regulatory agencies in order to achieve their business objectives. He regularly represents clients in court to defend their interests and achieve their goals.

Jon is the co-lead of the Firm’s California Land-Use Group. He assists clients to successfully navigate the review process to obtain entitlements for development. He has significant experience with coastal development and the permitting of industrial and energy facilities. Jon also represents local governments in high-profile land use matters.

Jon has further experience on development-related labor issues, including prevailing wage law and project labor agreements (PLAs). He has been recognized by California Lawyer as one of the preeminent prevailing wage practitioners in the state. Jon regularly represents developers and trade associations before the Department of Industrial Relations and has negotiated numerous PLAs.

Jon has a long track record of public service. He is an elected official, serving as Mayor of the Town of Tiburon, and previously served as a senior official at the California Natural Resources Agency. Jon has served for many years in leadership roles at both the California and San Francisco Bar Associations.


Jon Welner discusses two statutes that make California a unique place to develop projects, the California Environmental Quality Act and the California Prevailing Wage Law, as well as some best practices for developers to successfully navigate potential challenges.
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News & Press

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A Time for Change

January 11, 2021

In the January/February 2021 issue of Marin Living Magazine, Mintz Member Jon Welner was profiled as the recently elected Vice Mayor of Tiburon, CA. In the article, Mr. Welner addressed how challenges around diversity, technology, open space, and pandemic closures are reshaping the town for the better.
This feature story highlights the arrival of Member Jon Welner. The article notes that Jon, who joins the firm’s San Francisco office, focuses his practice on environmental law and land use matters, while also advising clients on prevailing wage issues.
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Events & Speaking

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CLA Environmental Law Conference

California Lawyers Association

Online Event

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Annual Meeting of the Real Property Law Section of the California Lawyers Association

The Wages of Subsidy: When are Prevailing Wages Required in Publicly Assisted Development Projects?

Hyatt Regency Newport Beach

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Supreme Court Ends Protection for Most Wetlands In The U.S.—But Not In California
June 1, 2023
The Supreme Court ends protection for most wetlands in the United States... In a sweeping decision, the Supreme Court last week eliminated federal protection for more than half the wetlands in the United States. (Sackett v. EPA, 566 U.S. ...
Coronado is betting that the Coastal Commission will save it from State housing laws
April 21, 2023
It's no secret that the wealthy enclave of Coronado is flouting State housing laws. What's remarkable is that it is hoping the Coastal Commission will come to its rescue. Communities across the State are reeling from massive new housing ...
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Recognition & Awards

  • Martindale-Hubbell AV Preeminent
  • Included on the Northern California Super Lawyers list (2017-2021)
  • Best Lawyers in America: Listed for Environmental Law; Litigation – Environmental; Natural Resources Law; Real Estate Law (2016 – 2023)
  • John Gardner Fellow
  • Harry S. Truman Scholar 
  • Phi Beta Kappa
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  • Mayor, Town of Tiburon, California
  • President, Board of Directors, Osher Marin Jewish Community Center
  • Executive Committee member and former Chair, Environmental Law Section, Bar Association of San Francisco
  • Advisory Board member, Environmental Law Section, California Lawyers Association (formerly the California State Bar)
  • Board of Directors, John Gardner Fellowship Association
  • Advisory Board, Stanford-in-Government
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Jon Welner


Los Angeles San Francisco