Public law

Our specialist lawyers are able to work in all areas of public law, as well as with all public sector operators. From assisting public authorities and agents to advising public entities and private companies, In Extenso Avocats makes full use of its multi-skilled network to meet client expectations.

Drawing on the experience of our teams, we study each case with the best legal and litigation strategy in mind.

Support from specialists to legally secure the projects of local authorities and public officials

Our teams assist public authorities in project preparation and decision-making by helping draft legislative acts. We also intervene with regard to administration policy, the granting of subsidiaries or inter-municipal cooperation.

Beyond the purely legal aspects, our lawyers also look at the political, economic and social context of each client, so as to provide the most appropriate and practical response. With high consideration for the stakes and consequences of public sector action, our litigation lawyers defend clients in liability cases (elected officials, agents, authorities) and electoral dispute cases, as well as representing them in the Regional Chamber of Accounts with regard to administrative, expropriation and financial issues resulting from their day-to-day activities.

Drawing on their skills, our lawyers also offer comprehensive management assistance to public sector agents, whether this be job creation, integration, reintegration of agents, salaries and promotion, or issues regarding diploma equivalence and the pooling of public sector services.

A support of specialists dedicated to the problems of local authorities, agents and public markets for more than 30 years

Our lawyers advise public and private actors in managing land assets and enhancing their value. Our experienced and reactive lawyers offer advice in implementing procedures governing pre-emption (instigation, acquisition, negotiation and contestation) and expropriation (drafting the DPU – Declaration of Public Utility, compensation for expropriation, administrative emphyteutic leases, contesting the DPU and expropriation, etc.).

Our areas of expertise include :

Town and country planning

ully aware of the economic, social and environmental challenges involved in town and country planning and the high rate of litigation in the field, our experienced lawyers provide public sector and private clients with a comprehensive service offer.


In the public sector, we serve our clients’ interests by monitoring and supporting decision-making on all planning issues, whether this be preparing planning documents (local urban plans, local inter-communal urban plans, territorial coherence schemes), advising on operational urban planning (subdivisions, real estate development operations) or advising on and monitoring complex issues such as port developments, retail parks, development zones (ZAC) and fire or flood risk prevention plans.

Our specialist lawyers also assist private clients in urban planning procedures, from preparing building permit applications (prior notifications, building permits, development permits, etc.) to defending the decision granted or contesting a refusal.

Public procurement and administrative contracts

Public authorities have recourse to public procurement, whether in the form of a tender or not, and bids from private operators must comply with the principles of public procurement if they hope to win the business. With this in mind, our lawyers advise public clients on managing their business affairs and assist in preparing legal tendering procedures right up until the final decision.

Whether it be soliciting government or local subsidiaries or ensuring the execution of public works, public tenders, public service delegations or concessions, our lawyers leverage their skills and expertise to ensure the legal security of projects.

Drawing on their experience, the teams in charge of the case also monitor bids issued by private operators, from the submission of the application to challenging contract awards.

Our wide-reaching experience with public authorities means our specialists are highly reactive and efficient when it comes to supervising and contesting public procurement procedures.

What makes us different

Multidisciplinary, our network of business law firms is interprofessional. We work in close collaboration with all the expertise present within the In Extenso group which allows our clients to benefit from a single, multi-interlocutor, to support them in their creation projects, development, management or transmission, whatever their sector of activity and the size of their company.

As a human-sized local network, our teams provide advice and litigation to all decision-makers, public authorities and individuals throughout France.


ce qui fait notre différence

Much more than a network…

In 2023, In Extenso Avocats has 50 employees including 22 associate lawyers and 21 lawyers and lawyers in collaboration who accompany on a daily basis VSEs, SMEs, liberal professions, communities, associations and foundations, executives and individuals in advice and litigation.

Our law firms, multidisciplinary, intervene in social law, tax, business law, real estate, civil law and international law. Some of them have more specific activities in public law, environmental law, insurance law, sports law and hotel-tourism-restaurant law.


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In Extenso Avocats brings together legal advice experts around common values who help companies (VSE, SME, ETI and large groups), associations, foundations, liberal professions, public authorities and more broadly all decision makers, to secure, manage and optimize their activity. Our lawyers also intervene in litigation to ensure the defense of the interests of their clients before the courts and jurisdictions concerned. Consulting subsidiary of the In Extenso group, French leader in accounting for small businesses and SMEs, In Extenso Avocats is a network of interprofessional business law firms combining legal professionals and professionals of the figure for a 360° support of companies and individuals.

Multidisciplinary, In Extenso Avocats helps its clients, all sectors of activity combined in multiple areas of law such as business law, commercial law, tax law, labour law and social protection, real estate and construction law, urban planning and regional planning law, environmental law, public law, intellectual property law including certified expertise in GDPR, family and heritage law and international law. Our lawyers are also recognized as experts in specific sectors of activity such as hospitality, catering, tourism or sports.

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