Jean-Marc Petit

Partner
Lyon office
Member of the Lyon Bar
Experiences
  • Partner with Adaltys Avocats since 2008
  • Lawyer with DS Avocats (2002-2008)
  • Lawyer with Granjon et associés (1994-2002)
  • Legal advisor with Léga-Cité (1991-1994)
  • Post-graduate degrees (DESS/DESU) in Urban Planning (Lyon II)
  • Master’s degree in public law (Lyon III)
  • 2025 – Best Lawyers : Lawyer of the year in public law
  • 2025 – Best Lawyers in planning and zoning law
  • 2024 – Best Lawyers in real estate law
  • 2024 – Best Lawyers in Environmental Law
  • 2024 – Best Lawyers in Public Law
  • 2024 – Tier 3 – Administrative and public law – Legal 500
  • 2024 – Tier 3 – Public law – Legal 500
  • 2024 – Excellent in town and country planning – Decision makers
  • 2024 – Excellent in Land Management – Decision Makers

Jean-Marc Petit assists public (State, local authorities) and private (developers and promoters) project leaders in regulatory urban planning (urban planning schemes (PLU- Plan local d’urbanisme) / permits), in the setting up and management of development operations (joint development zone (ZAC- Zone d’aménagement concerté), housing estates, land divisions), in expropriation and pre-emption, and in environmental law (consultations, environmental assessments and authorisations, protected species).

He advises on setting up development operations (coordination and scheduling of procedures, auditing ZAC and public utility dossiers (DUP- Déclaration d’utilité publique) etc.), interfacing with State services, auditing development or building permits, setting up urban planning tax tools (urban partnership projects (PUP- Projets urbains partenariaux) etc.), development concessions, drafting pre-emption decisions, deliberations for the establishment of future development area (ZAD- Zone d’aménagement différé), assistance and consulting on territorial coherence schemes (SCOT- Schéma de cohérence territoriale) and PLUs (procedure, drafting, legality).

He acts in litigation: defence of SCOTs, PLUs and permits, expropriations and pre-emptions, in particular urgent cases (summary proceedings – suspension).

Jean-Marc Petit teaches urban planning law at the LYON III University and regularly leads seminars and training courses in his areas of expertise, in particular for the EFE.

Experiences
  • Partner with Adaltys Avocats since 2008
  • Lawyer with DS Avocats (2002-2008)
  • Lawyer with Granjon et associés (1994-2002)
  • Legal advisor with Léga-Cité (1991-1994)
  • Post-graduate degrees (DESS/DESU) in Urban Planning (Lyon II)
  • Master’s degree in public law (Lyon III)
  • 2025 – Best Lawyers : Lawyer of the year in public law
  • 2025 – Best Lawyers in planning and zoning law
  • 2024 – Best Lawyers in real estate law
  • 2024 – Best Lawyers in Environmental Law
  • 2024 – Best Lawyers in Public Law
  • 2024 – Tier 3 – Administrative and public law – Legal 500
  • 2024 – Tier 3 – Public law – Legal 500
  • 2024 – Excellent in town and country planning – Decision makers
  • 2024 – Excellent in Land Management – Decision Makers

Expertises

Environmental law / Urban planning and development /

Business Cases