A boutique law firm in Portugal, with an international practice — built on the conviction that depth and discretion serve clients better than scale.
Founded in 2017, Durham Agrellos advises high-net-worth and ultra-high-net-worth individuals, families, investors, and family-owned groups on tax and private wealth matters with a Portuguese and cross-border dimension.
At Durham Agrellos, every client relationship is led by a partner. We deliberately limit our caseload to ensure this standard. It is not a marketing promise — it is a structural commitment.
Our team brings together expertise in tax, private wealth, family governance, corporate law, and litigation. Senior experience is the rule, not the exception.
Our clients span Brazil, the United Kingdom, the United States, Mexico, Switzerland, and beyond. We serve as the Portuguese nexus for international advisers, family offices, and private banking institutions worldwide.
Excellent professionals. More than just lawyers, they are top-tier advisors.ITR World Tax | 2026
Competence, professionalism, availability, customer focus, knowledge.Legal 500 | 2026
This firm stands out for its exceptional client service, strategic thinking, and deep understanding of complex legal matters. They take a highly personalised and pragmatic approach, which makes working with them efficient and reassuring.Legal 500 | 2026
They offer a very personalised service. They handhold the client from the beginning to the end. They explain in very simple terms the legal complexities and take care of the whole implementation.Chambers HNW | 2025
Durham Agrellos pairs private-wealth judgment with insolvency execution, giving family offices cross-border support that turns Portuguese court procedure into simple, actionable steps. Their strengths are flawless filings and evidence chains, recovery modelling that guides vote/objection strategy, and clear, phase-based budgets.Legal 500 | 2026
They are differentiated by providing a personalised and focused service. It is a boutique office with tailor-made practices and monitoring from the beginning to the end of the process.Chambers HNW | 2025
Durham Agrellos stands out for its exceptional technical expertise and deep understanding of complex tax and private wealth matters. The team combines rigorous legal knowledge with a pragmatic, solution-oriented mindset, and partners remain personally involved throughout each engagement, ensuring clarity, precision and timely execution.Legal 500 | 2026
This team is top in the area of tax and, in particular, international tax. They have assisted our group in tax litigation and international tax matters and are now advising on our international restructuring and expansion. They are certainly one of the top firms in Portugal in tax and international tax and truly make a difference in how they advise.Legal 500 | 2026
The team stands out for its depth of expertise, practical problem-solving and genuine care in every matter, focusing on real-world outcomes rather than abstract legal theory.Legal 500 | 2026
Durham Agrellos offers great expertise together with an easy and friendly relationship. The team provides a personal and unique approach.Chambers HNW | 2025
The firm's boutique model allows it to maintain a high level of quality and consistency across sophisticated tax structuring and sensitive cross-border matters, offering a rare combination of top-tier technical capability, agility and a genuinely client-centric approach.Legal 500 | 2026
The team is responsive, knowledgeable, and proactive. They're not just technically strong but also understand the broader commercial context, which adds real value. Their ability to collaborate across areas and deliver clear, actionable advice is a major strength.Legal 500 | 2026
