Duet advocaten B.V.

Construction and public procurement

Sanne specialises broadly in construction and procurement law. She advises and litigates on a broad range of procurement law matters and has extensive experience in setting up and guiding complex tender and procurement procedures. Sanne is co-lead of the firm's public health care and social domain practice, advising clients nationwide. She is recognised by clients and peers as a trusted and aknowledged specialist in this field.

In addition, Sanne has a strong construction and contract law practice. She focuses on advising professional clients on the realisation of large-scale construction projects, including the Victory Boogie Woogie Tunnel in The Hague, the renovation of the Binnenhof and the realization of the PALLAS Reactor in Petten. Her expertise covers both traditional and collaborative construction contracts, including alliances, two-stage contracts (such as construction teams) and various Cost+ contracts (including NEC4 and FIDIC). Where necessary, Sanne represents clients in proceedings before the civil courts and the Arbitration board for the building industry.

Sanne is a recognised Cost+ expert with hands-on experience in major projects. She is a member of the firm's dedicated Cost+ team and co-author of a new Cost+ contract model for the Dutch construction practice, launched in June 2025 via www.kostplus.nl

Sanne has been recognised as Next Generation Partner 2025 in The Legal 500.

Before Sanne became partner at Duet advocaten in 2024, she was a construction and procurement law lawyer at Croon advocaten (2018-2023). 

From 2015-2018 Sanne was a construction and procurement law lawyer at Pels Rijcken & Droogleever Fortuijn. She also worked as a legal advisor procurement at PIANOo Expertise Centre Procurement (2015) and as a procurement advisor European procurement and lecturer legal aspects of Facility Management at Hanzehogeschool Groningen (2010-2014).

Dutch and English

Sanne is a board member and secratary of the Dutch Association for Procurement Law (Nederlandse Vereniging voor Aanbestedingsrecht) since 2023 and member of the Association of Construction Lawyers (Vereniging voor Bouwrecht Advocaten).

Sanne has a Dutch Law degree.