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Home/ Koen de Puydt

Koen de Puydt

Managing Partner

Corporate Law and M&A / Commercial and Economic Law / Construction Law / Real Estate, Renting and Co-ownership / Administrative Law and Public Procurement / Urban Planning and Environmental Law / IP – Data Protection Law / Litigation and Arbitration / Sustainability

Koen de Puydt
+32 2 747 40 07
koen.depuydt@be.Andersen.com
Koen de Puydt
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Koen de Puydt graduated in 1998 as a degree in Communication Sciences (VUB), while he worked for the independent music magazine RifRaf as a journalist. After his studies, he continued his career as a music journalist with De Standaard and Studio Brussel. At the same time he obtained his Licentiate Degree in Law, specializing in Public Law at the VUB (2002). In 2009 he obtained a Master of Business Law at the University of Antwerp.

In 2002, Koen joined a Brussels niche firm specializing in administrative law (urban planning and environmental law, expropriations, government contracts, and protection legislation). In the meantime he remained responsible at de Puydt-van Cauwelaert for the files relating to commercial and economic law and intellectual property law.

Two years later, Koen started working full-time at de Puydt-van Cauwelaert. He was responsible for matters relating to urban planning and environmental law, real estate law, government contracts, contracting law, commercial and economic law, corporate law and intellectual property law. He also publishes on these matters.

In 2010 de Puydt-van Cauwelaert and GD & A Advocaten merged. Koen de Puydt, as partner, headed the Real Estate / Construction Law and Corporate Law units.

Since 2002 he has been lecturer “Contracts, Assignments and Mandates” at Syntra Brussels in the vocational training for real estate agents. In the course for Real Estate Experts, Koen lesson on construction law. He is the initiator of the Property Codex, a collection of legal texts tailored to the real estate professional. The codex is used throughout Flanders in the vocational training of the real estate agents within Syntra.

In August 2012, Koen co-founded the law firm ORYS. In April 2019, Koen together with Leo Peeters of Peeters Law have decided to set up a new law firm under the name of “Seeds of Law”.

Koen de Puydt has many publications to his name and gives on a regular base formations to real estate professionals.


Publications:

  • Koen DE PUYDT, Marc LOYENS en Ulrike BEUSELINCK, Vastgoedcodex 2024-2025, KnopsPublishing, 2024, (volledige editie), 1372 p.;
  • Koen DE PUYDT, Marc LOYENS en Ulrike BEUSELINCK, Vastgoedcodex 2023-2024, KnopsPublishing, 2023, (volledige editie), 1392 p.;
  • Koen DE PUYDT, Marc LOYENS en Ulrike BEUSELINCK, Vastgoedcodex 2022-2023, KnopsPublishing, 2022, (volledige editie), 1252 p.;
  • Koen DE PUYDT en Ulrike BEUSELINCK, Woninghuur in Vlaanderen en Brussel: uw 70 antwoorden op de meest praktische vragen, Intersentia, 2022, 201 p.;
  • Koen DE PUYDT, Ulrike BEUSELINCK en Stéphane DE KEYZER, Nieuwe woninghuur in Vlaanderen en Brussel: uw 60 antwoorden, Intersentia, 2019, 187 p.;
  • Koen DE PUYDT, Marc LOYENS, Julie LAUWERS en Stéphane DE KEYZER, Vastgoedcodex 2018-2019, Mijnwetboek.be, 2018, (volledige editie);
  • Stéphane DE KEYZERen Koen DE PUYDT, “Le pouvoir discrétionnaire de l’administration. Une mise à l’épreuve en marchés publics”, Jaarboek overheidsopdrachten/ Chronique des marchés publics 2017-2018, Brussel, EBP Publishers, 2018, pp. 467-495;
  • Koen DE PUYDT, Marc LOYENS, Julie LAUWERS en Guy BAELDE, Stéphane DE KEYZER, Vastgoedcodex 2017-2018, Mijnwetboek.be, 2017, (volledige editie);
  • Stéphane DE KEYZER en Koen DE PUYDT, “Des standards privés en marchés publics. La normalisation en droit de la passation et en procédure d’exécution des marchés”, Jaarboek overheidsopdrachten/ Chronique des marchés publics 2015-2016, Brussel, EBP Publishers, 2016, pp. 753-772;
  • Koen DE PUYDT, Marc LOYENS, Julie LAUWERS en Guy BAELDE, Stéphane DE KEYZER, Vastgoedcodex 2016-2017, Mijnwetboek.be, 2016, achtste editie;
  • Stéphane DE KEYZER en Koen DE PUYDT, “Des droits de propriété intellectuelle en marchés publics“, Jaarboek Overheidsopdrachten/ Chronique des marchés publics 2014-2015, Brussel, EBP Publishers, 2015, pp. 699-712;
  • Koen DE PUYDT, Marc LOYENS, Julie LAUWERS en Guy BAELDE, Vastgoedcodex 2015-2016, Mijnwetboek.be, 2015, zevende editie (1ste, 2de jaar en volledige editie);
  • Bert KELCHTERMANS, Koen DE PUYDT en Stéphane DE KEYZER “ Enkele van de meest in het oog springende nieuwigheden met betrekking tot wijzigingen, herzieningen en onvoorziene omstandigheden in de uitvoeringsfase van overheidsopdracht“, Jaarboek Overheidsopdrachten/ Chronique des marchés publics 2013-2014, Brussel, EBP Publishers, 2014, pp. 951-965;
  • Koen DE PUYDT, Marc LOYENS, Julie LAUWERS en Guy BAELDE, Vastgoedcodex 2013-2014, Mijnwetboek.be, 2013, zesde editie (1ste, 2de jaar en volledige editie);
  • Koen DE PUYDT en Sofie ALBERT, “Schorsingsprocedure bij uiterst dringende noodzakelijkheid – Betichting van valsheid – Vertrouwelijke stukken”, noot onder arrest RvS van 23 augustus 2011, nr. 214.846,  T. Aann. 2013/2, 167-177;
  • Koen DE PUYDT en Ulrike BEUSELINCK, “Verrijking zonder oorzaak – geval van zeldzame toepassing in het kader van overheidsopdrachten”, noot bij RB Dendermonde, 18 december 2009, T.ann. 2013, afl. 1, 75-83;
  • Koen DE PUYDT, Marc LOYENS en Julie LAUWERS, Vastgoedcodex 2012-2013, Mijnwetboek.be, 2012, 638 p., vijfde editie;
  • Jan GHYSELS en Koen DE PUYDT, Parlementair Ontleed: Het Milieuvergunningsdecreet: Het basisdecreet, Uitgeverij Intersentia, Nov. 2004, 603 p.;
  • Jan GHYSELS en Koen DE PUYDT, Parlementair Ontleed: Het Milieuvergunningsdecreet: De wijzigingsdecreten, Uitgeverij Intersentia, Maart 2005, 789 p.

Expertises

IP and Data Protection Law

IP and Data Protection Law

Sustainability

Sustainability

Litigation and Arbitration

Litigation and Arbitration

Urban Planning and Environmental Law

Urban Planning and Environmental Law

Administrative Law and Public Procurement

Administrative Law and Public Procurement

Real Estate, Renting and Co-ownership

Real Estate, Renting and Co-ownership

Construction Law

Construction Law

Commercial and Economic Law

Commercial and Economic Law

Corporate Law and M&A

Corporate Law and M&A

Qualification

  • Master in Communication Sciences - VUB (Vrije Universiteit Brussel) - 1989
  • Master of Laws - VUB (Vrije Universiteit Brussel) - 2002
  • Master of Business Law - UA (Universiteit Antwerpen) - 2009

Languages

  • Dutch
  • French
  • English

Memberships

  • Andersen Global
  • BVS
  • BLSC
  • IR Global
  • Brabant Business Club
  • Conferences and seminars

  • “Milieurecht in Brussel: Een wandeling door wetgeving én praktijk” - Koen de Puydt - “VIVO-Sterk in Vastgoedvorming” - 4 March 2021
  • “Actua Stedenbouw Brussel” - Koen de Puydt and Aline Heyrman - “VIVO-Sterk in Vastgoedvorming” - 15 December 2020
  • “Actua van de vernieuwde Brusselse huurregelgeving” - Koen de Puydt and Ulrike Beuselinck - “VIVO-Sterk in Vastgoedvorming” - 29 October 2020.
  • Legal News

    We are pleased to announce several important developments that will further strengthen Andersen in Belgium’s M&A and commercial law capabilities as of January 2026.

    19.01.2026

    We are pleased to announce several important developments that will further strengthen Andersen in Belgium’s M&A and commercial law capabilities as of January 2026.

    First, we are pleased to announce that the West Flanders team of Philippe & Partners has joined Andersen in Belgium. Based in Roeselare, the team is led by Partner Dirk Clarysse, together with Charlotte Romaen, Senior Counsel.

    Read the article »
    Court of Cassation confirms the personal disciplinary liability of each individual real estate agent, including those operating within a real estate group
    News

    14.01.2026

    Real Estate, Renting and Co-ownership

    Court of Cassation confirms the personal disciplinary liability of each individual real estate agent, including those operating within a real estate group

    By judgment of 18 December 2025, the Belgian Court of Cassation delivered a significant ruling in a disciplinary (disciplinary law / professional disciplinary proceedings) case against a real estate agent, with far-reaching consequences for the real estate profession.

    Read the article »
    Construction Law & Liability of the Architect

    13.01.2026

    Real Estate, Renting and Co-ownership

    Construction Law & Liability of the Architect

    In an important judgment of 19 December 2025 (C.25.0192.F), the Court of Cassation emphasized the fundamental importance of the architect’s duty of supervision when selecting the contractor, in particular with regard to the contractor’s access to the profession.

    Read the article »
    Andersen welcomes a new partner in EU Regulatory, Competition Law and Public Affairs
    News

    10.07.2025

    EU Law and EU Sanctions

    Andersen welcomes a new partner in EU Regulatory, Competition Law and Public Affairs

    We are pleased to announce that Miguel Ángel Caramello-Álvarez has joined our firm as a Partner in EU regulatory, competition law, and public affairs.

    Read the article »