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California Cannabis
Expert Advisors to California Cannabis Businesses
Fewer businesses face more hurdles than cannabis-based ones. Successfully navigating complex industries like this calls for bold lawyers. Trust Harris Sliwoski for industry-expert legal planning, regulatory support, corporate guidance, and compliance strategies.
Contact UsCalifornia Cannabis Business Lawyers: Licensing, Compliance, & Business Counsel
Few industries put more pressure on a business's legal foundation than cannabis. Between a patchwork of state and local rules, tight banking restrictions, and a regulatory landscape that keeps shifting, cannabis operators need lawyers who track the changes as closely as they track their own P&L. Harris Sliwoski's California cannabis attorneys have advised growers, manufacturers, retailers, distributors, and investors since the state's earliest medical-cannabis days, and we bring that depth to every licensing, compliance, transactional, and litigation matter we handle. Contact us to schedule a consultation with our California cannabis team.
From Compassionate Use to MAUCRSA: How California Cannabis Law Got Here
California was the first state in the nation to legalize medical cannabis, through 1996's Proposition 215 (the Compassionate Use Act). Two decades later, voters passed Proposition 64 in 2016, legalizing adult-use cannabis and setting up the eventual merger of the state's medical and recreational frameworks into the Medicinal and Adult-Use Cannabis Regulation and Safety Act (MAUCRSA). MAUCRSA remains the backbone of state-level cannabis regulation today, administered primarily through the California Department of Cannabis Control (DCC), alongside agencies like the California Department of Tax and Fee Administration, and the Department of Fish and Wildlife.
In 2026 we are seeing fresh federal-level developments that California operators can't ignore: the U.S. Drug Enforcement Administration's ongoing rulemaking to reschedule marijuana from Schedule I to Schedule III, and new federal hemp legislation that redefines "hemp" and tightens the rules around hemp-derived cannabinoid products. Neither change legalizes cannabis outright, but both carry real implications for interstate commerce, banking access, and product compliance for California-licensed and hemp-adjacent businesses alike (Harris Sliwoski, "U.S. Cannabis Law and Policy in 2026"). Our attorneys monitor these developments in real time and translate them into practical guidance for clients operating in, or expanding into, California.
California Cannabis Has Its Complexities
MAUCRSA governs state licensing, but it also expressly empowers cities, counties, and other municipalities to regulate cannabis businesses in their own, often very different, ways. That means a state license alone rarely gets a business fully operational. Local zoning restrictions, caps on the number of permits issued, local tax structures, and community-benefit or labor-peace requirements vary dramatically from one local jurisdiction to the next, and they change frequently. Our attorneys track both the regularly amended state framework and the fast-moving local ordinances that determine whether a business can actually open its doors in a given city or county.
California Cannabis Legal Services
The cannabis industry is dynamic and multifaceted. So are we. Our experienced cannabis business lawyers in Los Angeles and San Francisco can help cannabis companies statewide across their legal footprint.
Licensing & Permitting
We guide clients through both standard and competitive licensing and permitting processes across California's cultivation, manufacturing, distribution, retail, and testing license categories, including navigating annual license renewals, ownership and financial-interest disclosures, and the local approvals that must be secured before a state license can be issued or activated.
Mergers, Acquisitions, & Investment
Cannabis M&A carries deal-structure and due diligence issues that general corporate counsel often overlook, including license transferability, change-of-ownership filings, and regulatory approval timelines that can make or break a closing date. Our team has advised on cannabis transactions representing billions of dollars in aggregate deal value, guiding buyers, sellers, and investors through structuring, regulatory due diligence, and closing.
Corporate Structuring & Entity Formation
The entity structure a cannabis business chooses affects taxation, management rights, and economic rights in ways that are magnified by cannabis-specific tax rules (including the ongoing effects of IRC Section 280E) and local ownership-disclosure requirements. We help clients choose and establish the entity structure that best protects their interests from day one, and restructure existing entities as businesses scale or bring in new investors.
Contracts & Debt Collection
Traditional banks remain reluctant to extend credit to cannabis businesses, so much of the industry runs on trade credit extended directly between companies. That creates real cash-flow exposure when a buyer doesn't pay. We draft contracts built to hold up under scrutiny, and when a customer defaults, we help clients pursue collection through a strategy tailored to the relationship and the amount at stake.
Regulatory Compliance & Enforcement Defense
From packaging and labeling to track-and-trace, advertising rules, and testing and recall requirements, compliance touches nearly every part of a cannabis operation. When the DCC or a local licensing authority opens an investigation or enforcement action, our attorneys step in to manage the response, negotiate resolutions, and protect the license.
Intellectual Property Licensing
Brand value is often a cannabis company's most important asset and one of its most exposed. Trademark protection for cannabis goods still faces federal limitations that do not exist in most other industries. We help clients license and protect trademarks, packaging, and brand assets in ways that account for those limitations.
Litigation & Dispute Resolution
Beyond our corporate and regulatory work, our team represents California cannabis clients in court and agency litigation and arbitration, from partnership and ownership disputes to trade secret and unfair-competition claims that are common in a fast-growing, high-stakes industry.
Serving Cannabis Businesses Across California
California cannabis law isn't one statewide rulebook — it's dozens of local ones layered on top of MAUCRSA. Our attorneys, working from our Los Angeles and San Francisco offices, regularly advise clients in:
- Los Angeles & Southern California — one of the largest retail and manufacturing markets in the state, with its own city-level social-equity and permitting rules.
- San Francisco & the Bay Area — an early adopter of local cannabis regulation, with ongoing local-permit renewal and compliance obligations.
- The Emerald Triangle (Humboldt, Mendocino & Trinity Counties) — the historic heart of California cultivation, where county-level cultivation permitting and land-use rules are especially detailed.
- Sacramento — home to the Department of Cannabis Control and a growing retail and distribution hub.
- San Diego — a market shaped by its own local licensing caps and zoning overlays.
- The Central Valley — an expanding cultivation and manufacturing corridor with county rules that differ sharply from coastal jurisdictions.
Wherever your business operates in California, our team can help you understand what state and local law requires in that specific jurisdiction.
California Cannabis FAQs
Do I need a local permit in addition to a state cannabis license?
In almost every case, yes. MAUCRSA requires state licensees to also hold the required local permit or authorization from the city or county where they operate, and the DCC generally will not issue or renew a state license without proof of local approval.
Can I operate a cannabis business in California if my city or county hasn't opted in?
No. Cities and counties are not required to allow commercial cannabis activity, and many have banned it outright or allow only certain license types. Confirming local status before signing a lease or making an investment is a critical first step.
What happens to my cannabis license in a merger or acquisition?
Cannabis licenses generally aren't automatically transferable. A change of ownership, financial interest, or management structure typically requires prior notice to, and often approval from, the DCC and the relevant local authority, which affects deal timing and structure.
How does federal cannabis rescheduling affect my California business?
Federal rescheduling only partially affects California cannabis businesses right now: it removes the harsh Section 280E tax penalty for state-licensed medical cannabis operations, but recreational/adult-use sales remain unaffected because they stay on Schedule I.
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CANNA LAW BLOG
An intelligent, timely resource for the cannabis industry
Beyond client work, Harris Sliwoski's California cannabis attorneys write, speak, and are frequently quoted on cannabis legal issues. Our team contributes regularly to the Canna Law Blog, speaks to business, trade, academic, and government audiences, and maintains a growing Cannabis Glossary to help demystify industry terminology — from "MAUCRSA" to "track-and-trace" to "social equity licensee."
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Our Clients' Successes
“Harris Sliwoski expertly guided us through the formation of our company. They continue to assist with necessary registrations and compliance with numerous regulations. They were able to promptly answer all our many questions and provide understandable options, explanations and practical advice. We expect to continue to use Harris Sliwoski on a regular basis as our company expands. They were also able to introduce us other professional experts. We would not hesitate to recommend Harris Sliwoski to any companies in need of legal advice.”
Three Continents Foods LLC
This law firm was a huge help as our company went through the process of commercial licensing in the California cannabis industry. They have helped us with a variety of legal issues in a timely fashion, while clearly communicating with us throughout the process. Everyone we’ve worked with at Harris Sliwoski is an expert in their field and we have always felt that we were in good hands through our legal representation.
Wil Crummer, CEO PRO Farms
Legal stuff is always scary. And I've had to play offense a couple times, begrudgingly. To have Harris Sliwoski have my back? It made things a lot less prickly. They quickly walked me through my options, and were refreshingly consistent in their communications, timing and billing. I've been lucky to stay out of the legal side of things my whole career, thankfully. When things went a little wrong, Harris Sliwoski quickly made things right.
Aaron Draplin, Founder Draplin Design Co.
I am impressed with this law firm. They answered all my questions regarding cannabis businesses and the California cannabis framework, and they have helped me with a variety of legal issues in a timely fashion, while always clearly communicating with us throughout the process. They also redirected me to other quality people for my business needs. Everyone I worked with at Harris Sliwoski is an expert in their field, and I was in good hands throughout my legal representation.
Corey T., CEO Thinc Cubed, LLC
I have been working with the lawyers at Harris Sliwoski for more than 20 years both as a business owner and as an executive at a large east-coast health system and that is because they have always efficiently provided high level and clear international law advice. Most recently, Harris Sliwoski provided legal support on many matters related to procuring medical products worldwide. Their support was particularly helpful to during the onset of COVID, when there was a big need for securing PPE quickly, all while navigating complicated international and domestic legal requirements. Harris Sliwoski’s team of international lawyers helped by conducting rapid-fire due diligence on potential suppliers, navigating the legal logistics for getting product from overseas and through U.S. customs, and drafting contracts to protect against various sorts of horribles. They did this by essentially providing what amounted to 24/7 service. I cannot recommend them highly enough.
Dan Pak Hospital Supply Chain Executive
Harris Sliwoski has represented our company in the legal cannabis industry for years. Harris Sliwoski has advised us in a wide variety of legal matters, and they are truly experts in their field. I would highly recommend Harris Sliwoski to anyone with questions about cannabis law, or any legal matters. They have been great for our Company, and will continue to guide us as our industry evolves
Matt Hurt, COO Cannabis Nation
You won't find a better partner than Harris Sliwoski when trying to navigate the complex world of healthcare regulations. They not only give sound and reliable legal advice, but they are also very responsive and are able to guide you in a way that helps you reach your business objectives as well.
Joseph Axelrod, General Counsel Irwin Naturals
When we started the process of building a 'seed to sale' cannabis company in Oregon, we saw the need for expert legal counsel. The cannabis sector is fraught with potential peril at every turn, and we wanted the best legal advice we could find. After talking to several firms and individuals, we feel extremely fortunate to have chosen Harris Sliwoski as our legal counsel.
Tony Theiss, CEO and Co-Founder Redbarn Cannabis
We use Harris Sliwoski on all our international legal matters, including on our international litigation matters. We have over the last few years been involved in a couple big international legal disputes and Harris Sliwoski’s international dispute resolution team provided us with expert legal assistance on both matters. They were always very careful to explain to us what they were doing and why and what their actions would likely cost us in legal fees. Most importantly, we did extremely well on both cases and I have no doubt Harris Sliwoski was a big factor in that.
Kevin English, CEO We Are Camp
We have used Harris Sliwoski for legal help related to our international manufacturing. The lawyers with whom I worked had extensive familiarity with the international legal issues involved in our various projects and offered us key insights. I particularly appreciated how they always quickly and efficiently do what they say they will do and always within their cost estimates.
Andrea Barona Valladolid, Senior Legal Counsel Fairphone
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