Kaplan Kirsch & Rockwell LLP

Kaplan Kirsch LLP is a national law firm focused on transportation, infrastructure, energy, land use and environmental law. The firm has offices in Denver, New York, San Francisco and Washington D.C. The site says it opened a Los Angeles office in 2026.

The firm says it was founded in Denver, Colorado, in 2003 by six attorneys. They left a firm that had merged with a large international firm, and started their own. From the start, the founders focused on transportation, infrastructure, land use and environmental law, with public projects in mind.

The site says the firm opened a Washington D.C. office in 2006. It set up a public-private partnerships practice and opened a New York office in 2017. It added a tribal law practice and a San Francisco office in 2020. In 2026, the firm took the name Kaplan Kirsch LLP after the retirement of Sarah Rockwell.

The site lists airport law among its practice areas. A project page covers the Paine Field commercial service and passenger terminal in Everett, Washington. The firm also publishes an Airport Law Digest, with a 2026 mid-year update.

The site lists other projects. These include the Mountain Energy Project Settlement in Summit County, Colorado, the Crystal River Water Rights Litigation in western Colorado, and the Red and Purple Modernization Project in Chicago, Illinois. The site says the firm has served as counsel to public agencies, including municipal utilities.

The contact page lists offices and phone numbers. Denver is at 1675 Broadway, with phone 303.825.7000. New York is at 1500 Broadway, with phone 646.883.5110. San Francisco is at One Sansome Street, with phone 415.907.8704. Washington D.C. is at 1634 I Street NW, with phone 202.955.5600.

The site says the firm's attorneys have served as counsel to public agencies, including municipal utilities, across the United States. It says the firm has represented public interest organizations in high-profile environmental litigation and served as government counsel at the highest federal levels.