Construction and property law

Real estate embraces a host of economic, political and social issues, and is as vast as it is complex. In Extenso Avocats works in all areas of property on a daily basis, both with regard to private and public law.

Real estate and construction law, the core expertise of our firms

In Extenso Avocats accompanies numerous real estate professionals including estate agents, property developers, construction companies and building insurance companies, assisting in all their activities and relations with service providers, clients and suppliers.

Our team offers advice on project feasibility studies, building lease negotiations, emphyteutic leases, off-plan leases and property finance leases.

We assist project managers and building firms with contracts and legal issues at all stages of the construction project, including:

  • Emergency procedures (summary proceedings)
  • During preventative summary proceedings and subsequent monitoring of legal proceedings
  • In potential disputes between stakeholders: project managers (AMO), delegated contracting parties (MOD), design and/or construction managers, companies, subcontractors, building inspection services (both during the construction phase and on delivery), insurers, etc.
  • In enforcing building warranties and guarantees

The lawyers
in construction and property law

In Extenso Avocats also advises individuals and companies in the following areas, in particular :

  • Residential leases: lease drafting, rent arrears, termination, right of first refusal, etc.
  • Formation of joint ownership, general meetings, recovery of monies, compliance with joint ownership regulations, joint ownership exit strategy, creation of housing associations, etc.
  • Public or private property sales: promises to sell, acquisitions and sales, auctions
  • Property investments, sale of assets and property companies
  • Land negotiation, property mandates
  • Real estate development
  • Tenancy in common (termination)
  • Improving access
  • Evictions
  • Constitution of easements
  • Tax adjustments with regard to property (assessing an asset’s market value, contesting before the tax authorities)

The strategy that we define together with our clients frequently results in a discreet and amicable solution being found, rather than litigation. Discussions between lawyers are governed by professional secrecy, meaning that we can find, as the case may be, the most appropriate solution.

In Extenso Avocats regularly acts as a cross-disciplinary advisor on asset or portfolio acquisitions and sales, restructuring, mergers and acquisitions and refinancing transactions such as sale and lease-back.

  • Property management, real estate management, transfer of business assets or lease rights
  • Creation of companies: SARL, SCI, SAS, SA, etc.
  • Legal and tax restructuring of complex real estate projects: public buildings, hotels, nursing homes, shopping centres, etc.
  • Estate agents: recovery of fees, mandates, professional civil liability
  • Asset managers, property dealers

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.



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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