Durham Agrellos is a boutique law firm headquartered in Portugal, with an international outlook and a client base spanning multiple jurisdictions.
From its base in Portugal, the firm provides tailored advice to domestic clients and to international clients with interests or domicile in Portugal, as well as multinational businesses with complex, cross-border needs.

With recognised expertise in Tax and Private Wealth Law, and complex transactions, Durham Agrellos delivers robust, innovative, and creative legal strategies for particularly challenging matters. Its institutional model of low leverage and high specialisation ensures rigorous and personalised support. The firm works closely with clients and their local or international advisers, coordinating matters with a Portuguese nexus and delivering multi-jurisdictional solutions tailored to global needs.

Durham Agrellos has extensive experience advising global entrepreneurial families, investors, and family offices, particularly in strategic areas such as family governance structures, real estate transactions, and private equity. It also advises domestic and multinational groups with a presence or interests in Portugal and represents clients in high-profile tax litigation and tax arbitration, as well as other complex disputes.

The firm is recognised as a leading practice by major international legal directories, including Chambers and Partners, The Legal 500, International Tax Review, and Best Lawyers. It was recently distinguished with the award “Client Service Excellence 2025 – Portugal” at the inaugural Legal 500 Iberia Awards.

Durham Agrellos

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