Litigation Arbitration Dispute resolution
Castellá Hammerstein is an independent boutique law firm focused exclusively on the prevention and resolution of civil and commercial disputes, both domestic and international.
We represent clients before the Spanish courts and in commercial arbitration, and advise on negotiation, settlement and other forms of amicable dispute resolution.
Drawing on more than 25 years of experience gained at leading Spanish and international law firms, we act in complex business disputes, including shareholder and corporate conflicts, contractual disputes, M&A-related claims and damages actions.
We work closely with our clients, combining strategic judgement, technical rigour and direct partner involvement. Wherever possible, we seek to avoid or resolve disputes efficiently; where litigation or arbitration is required, we pursue our clients’ interests with determination.

Services
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Civil and commercial litigation
We defend our clients’ interests, as claimants or defendants, before the Spanish courts at every level.
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Arbitration
We represent clients in domestic and international commercial arbitration, both institutional and ad hoc, and in related proceedings before the Spanish courts.
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Alternative dispute resolution
We advise clients in negotiations aimed at preventing court or arbitral proceedings, bringing them to an end or reaching an agreed solution. We also assist them in mediation and conciliation.
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Commercial contracts
We draft, review and negotiate commercial agreements with the practical perspective that comes from our experience in contractual disputes, with the aim of anticipating risks and preventing future disputes.
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International
We work with trusted lawyers and law firms in other jurisdictions whenever a matter requires it.
Five values. One way of working.
Rigour
We approach every matter with technical rigour, attention to detail and a constant commitment to the quality of our work.
Independence
We exercise our professional judgement with complete independence, always seeking the solution that best serves our clients’ interests.
Commitment
We are personally involved in every matter, with availability, responsibility and a determined defence of the interests entrusted to us.
Respect
We practise law with respect, courtesy and consideration towards everyone we deal with, without compromising the firmness with which we defend our clients’ interests.
Transparency
We communicate clearly about the scope of our work and our fees.