James Thorburn

Managing Attorney

Thorburn Walker, LLC

Jim is recognized nationally as a change maker in cannabis tax law. He is regarded as a leading cannabis trial attorney.

Call Rates

Duration Price
15 minutes $90.00
30 minutes $175.00
60 minutes $350.00


280E tax litigation court licensing zoning construction law real estate law

Latest Knowledge Board posts

Thursday, January 4, 2018


Jim Thorburn is currently a lawyer in the Denver Metro area of Colorado and has been since 1992. He is a founding partner of Thorburn Walker LLC, which has offices in the Denver Tech Center and Longmont, Colorado.  

Jim is keenly aware of the current federal and state issues affecting dispensaries, and works hard to achieve successful outcomes for his clients. He helps dispensaries, grow facilities, and other businesses navigate through complex legal issues including tax court and IRS audits. In addition to 280E issues, Jim also provides general business representation, and helping dispensaries comply with the local and state laws and regulations. 

Jim has received national recognition as a lead litigating attorney in the cannabis industry’s key cases; like Feinberg v. Commissioner of Revenue, as well as other high-profile cases.  Jim speaks on marijuana legal issues across the country.  In the near future, you will begin to find his 280E blogs on the NCIA website.

Jim also provides legal representation helping dispensaries, grow facilities, and retail product companies comply with Colorado’s Cannabis laws and regulations.

Mr. Thorburn graduated from the University of Denver, Sturm College of Law in 1991.

Jim is licensed to practice in State of Colorado, Colorado Federal District Court, Tenth Circuit Court of Appeals and the U.S. Supreme Court

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