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Our Legal Practices

With a dedicated team of experienced attorneys, Thorburn Walker knows that the best way to address our clients’ legal issues is to understand their business and industry. Your case is important to us — read on to learn about our areas of expertise.

Cannabis Tax Law and General Cannabis Law

Thorburn Walker, LLC offers over 50 years of combined legal and CPA experience and represents Colorado dispensaries in a variety of ways. We are keenly aware of the current federal and state issues affecting Colorado dispensaries and work hard to achieve successful outcomes for our clients. In federal matters, we advise and represent clients across the nation. We advise and represent clients across the nation. 

We help dispensaries navigate through complex legal issues, including the following: 

  • Litigation

  • Tax defense and audit representation

  • Licensing

  • Regulatory Compliance

  • Intellectual Property

  • Risk Management

  • Banking

  • Investment Transactions

  • Contract drafting and negotiation

  • Real estate

Our firm is involved in the most innovative and sophisticated cannabis litigation in the nation, and we have had several published opinions. Please refer to our media page for examples of the type of litigation we are currently involved in. 

Commercial Litigation and General Business Representation 

When you run a business, you can expect to face issues from time to time.  Whether you are working with other companies, or directly with consumers, legal disputes will arise. When they do, you need dedicated, experienced legal counsel who can see you through the conflicts that threaten your livelihood.  Our attorneys work hard to advocate for you and your business in the following areas: 

  • Business Formation – creating a business entity and structuring by-laws and other agreements between owners

  • Buy-Sell Agreements

  • Contract drafting, review, and negotiation with customers, employees, employers, and suppliers

  • Commercial Litigation and dispute resolution

  • Annual and other regulatory filings for the business

  • Buying, selling and transferring interests in real estate

One of the best ways to fight disputes over contracts is to ensure those disputes never arise in the first place. In running a business, you face many circumstances in which advice from an experienced business lawyer can keep you from making the wrong decisions, and ensure you are legally covered. Keeping a general business attorney on tap gives you someone to call whenever you face those difficult legal questions. A general business attorney can also look over every contract you enter into and ensure every line means what you think it means, so you don’t end up signing something that can come back to haunt you.

When you need general business representation, or a litigation attorney, our attorneys can provide the business counsel you need to get through your legal struggles, so you can get back to the important task of running your business.

Land Use and Entitlements

Do you have a land use, entitlement, or construction issue that is preventing a project from moving forward and causing you stress or financial hardship? When it comes to something as important as your land, you need the advice of a lawyer you can trust to represent your best interests.


Our attorneys have represented every party in a land use claim and we provide representation in the following areas: 

  • Municipal Annexation

  • Zoning and Rezoning

  • Development Agreements and Protection of Vested Rights

  • Subdivision Plats and Improvement Agreements

  • Historic Preservation and Conservation Easements

  • Special Districts and Other Public Financing Arrangements

  • Zoning Challenges

We know firsthand how critical it is to have an advocate with legal knowledge counseling you through an ongoing court case in land use claims. We welcome anyone who is in need of legal representation in a land use matter, be they individuals, families, or companies with a legal need. 

Probate, Wills & Estate Planning

When it comes to financial planning and relief, there are several ways in which the law can serve you. Estate planning can help you set up a system to provide for your loved ones after your death.


Preparing for your family’s well being after you are gone is the basis for most estate planning, but not all estate planning is the same. The best options for your estate plan depend heavily on how much money you have in savings, real estate, and other investments. When you work with an experienced attorney, you can plan your estate so the state takes less and your family receives more.

Our attorneys can assist you with your probate needs, ensuring your wishes are met and your estate plan is distributed according to your desires.

Commercial Real Estate 

Our real estate attorneys apply themselves to preparation and review of your real estate documents, the negotiation of terms and conditions, and the transference of titles. They provide advice to clients who are unsure of how real estate laws and regulations could affect their business when buying or selling real estate. When a breach of contract transpires or a real estate fraud occurs, our lawyers step in and go to court to represent our client in their case.

Thorburn Walker provides real estate representation in the following areas:


  • Drafting, reviewing, and negotiating leases, purchase agreements, deeds of trust, promissory notes, contracts for the sale, acquisition, development and/or conversion of properties and other real estate related documents   

  • Litigating contracts for the purchase or sale of a property, property ownership, title issues, fraud and disclosure problems, easement disputes, foreclosure actions, evictions, leasing disputes, premises liability and multi-party construction defect litigation  

Tax Controversy and IRS Planning

       The commercials are everywhere; national companies saying they can take care of all of your tax problems; settle for pennies on the dollar. It seems so easy. Just call the 1-800 number and your tax problems will magically disappear. The problem is, without the right representation, you could end up wasting thousands of dollars and your tax problems won’t go away, and in some cases they can get worse.

       Whether you’re being audited, have failed to file returns or owe back taxes, it is important to seek assistance from a firm that is qualified to represent you. Our attorneys have advised clients on a variety of tax matters and are involved in some of the most innovative and sophisticated cases in the nation. We provide tax representation in the following areas:

  • Business, trust, estate, or individual

  • Federal and State Tax Law Regulatory Compliance

  • Federal and State Civil Audit Representation, to include audits, assessments, and collection activities 

  • Representation before the IRS, the Department of Justice, and state taxing authorities 

  • Pursuing federal or state administrative or judicial appeals 

Appellate Practice

Although all cases are initially tried at the trial court level, the losing party may appeal his or her case to higher courts known as appellate courts. Our attorneys advocate your case before a state or federal appellate court, including state supreme courts and the United States Supreme Court. We seek to correct errors of the trial judge by persuading the appellate court to overturn the lower court's decision or to expand or change the interpretation of statutory law.

Construction Law

Our attorneys represent clients from the beginning phases of construction up through the conclusion of a project, providing efficient and capable legal service. We provide representation in the following areas: 

  • Multi-party construction litigation, involving contract interpretation, warranty obligations, design liability, project delays and disruptions, mechanic liens, and surety bonds. 

  • Working with general contractors, subcontractors, engineers, developers, owners and other construction professionals to advise them regarding the formulation, negotiation and administration of construction contract documents.

  • Advice about risk management so that our clients can avoid disputes.

  • Drafting and negotiating project contracts for every project delivery method