Maître Mathilde LE GUEN

Avocat au barreau de Rennes

Avocat titulaire d'un certificat de spécialisation en Droit public

Compétences : Droit public, Expropriation, Urbanisme, Droit de l'environnement, Urbanisme

Barreau : Rennes

Adresse : 23 rue de la Monnaie 35000 RENNES

{"comp-1":{"id":"1","name":"Avocat g\u00e9n\u00e9raliste","type":"public1","childs":[]},"comp-2":{"id":"2","name":"Droit civil, de la famille, des personnes, et de la consommation","type":"public1","childs":{"comp-1":{"id":"1","name":"Droit de la famille, des personnes et de leur patrimoine","type":"cnb1","childs":{"comp-21":{"id":"21","name":"Divorce, s\u00e9paration, droit de garde, pension alimentaire, prestation compensatoire","type":"public2","childs":[]},"comp-22":{"id":"22","name":"Etat civil : changement de nom ou pr\u00e9nom, mariage, pacs, concubinage","type":"public2","childs":[]},"comp-23":{"id":"23","name":"Majeurs incapables : tutelles, curatelles","type":"public2","childs":[]},"comp-24":{"id":"24","name":"Adoption, filiation et Contestation \/ reconnaissance de paternit\u00e9","type":"public2","childs":[]},"comp-25":{"id":"25","name":"Successions, donations, h\u00e9ritages, testaments","type":"public2","childs":[]},"comp-26":{"id":"26","name":"Droit du patrimoine, r\u00e9gime matrimonial, contrats de mariage","type":"public2","childs":[]},"comp-27":{"id":"27","name":"Droit du surendettement et d\u00e9fense des personnes surendett\u00e9es","type":"public2","childs":[]},"comp-28":{"id":"28","name":"Autorit\u00e9 parentale et garde des enfants","type":"public2","childs":[]},"comp-29":{"id":"29","name":"Responsabilit\u00e9 civile, sinistres, accidents, dommages et int\u00e9r\u00eats","type":"public2","childs":[]}}},"comp-8":{"id":"8","name":"Droit du cr\u00e9dit et de la consommation","type":"cnb1","childs":{"comp-31":{"id":"31","name":"D\u00e9fense des emprunteurs, cr\u00e9dits \u00e0 la consommation, pr\u00eat immobilier et caution","type":"public2","childs":[]},"comp-32":{"id":"32","name":"Protection du consommateur : contrats, vente \u00e0 distance, clauses abusives, vice cach\u00e9","type":"public2","childs":[]}}}}},"comp-3":{"id":"3","name":"Droit immobilier, baux, construction, voisinage","type":"public1","childs":{"comp-5":{"id":"5","name":"Droit immobilier","type":"cnb1","childs":{"comp-34":{"id":"34","name":"Immobilier professionnel : Bail commercial, fonds de commerce, droit au bail, locaux","type":"public2","childs":[]},"comp-35":{"id":"35","name":"Conflits de voisinage, servitudes, d\u00e9pendances, droit de passage","type":"public2","childs":[]},"comp-36":{"id":"36","name":"Construction, travaux, malfa\u00e7ons et responsabilit\u00e9 artisans, ma\u00eetre d'oeuvre, architecte...","type":"public2","childs":[]},"comp-37":{"id":"37","name":"Bail d'habitation, contentieux propri\u00e9taire-locataire, loyers, cong\u00e9s, expulsions","type":"public2","childs":[]},"comp-38":{"id":"38","name":"Copropri\u00e9t\u00e9, contentieux des AG, litiges copropri\u00e9taires, syndic","type":"public2","childs":[]},"comp-39":{"id":"39","name":"Urbanisme, permis de construire, lotir, autorisation travaux, PLU...","type":"public2","childs":[]},"comp-40":{"id":"40","name":"Droit de l'expropriation, pr\u00e9emption, DIA, contentieux","type":"public2","childs":[]},"comp-41":{"id":"41","name":"Droit des mines, \u00e9nergies renouvelables, mati\u00e8res premi\u00e8res","type":"public2","childs":[]}}},"comp-9":{"id":"9","name":"Droit public","type":"cnb1","childs":{"comp-39":{"id":"39","name":"Urbanisme, permis de construire, lotir, autorisation travaux, PLU...","type":"public2","childs":[]}}}}},"comp-4":{"id":"4","name":"Droit du travail et droit de la s\u00e9curit\u00e9 sociale","type":"public1","childs":{"comp-6":{"id":"6","name":"Droit du travail et social","type":"cnb1","childs":{"comp-42":{"id":"42","name":"D\u00e9fense des salari\u00e9s lors d'un licenciement devant les prud\u2019hommes ","type":"public2","childs":[]},"comp-43":{"id":"43","name":"D\u00e9fense des salari\u00e9s en poste : modification contrat de travail, proc\u00e9dure disciplinaire","type":"public2","childs":[]},"comp-44":{"id":"44","name":"D\u00e9fense des salari\u00e9s : cong\u00e9s maternit\u00e9, parental, harc\u00e8lement moral et sexuel","type":"public2","childs":[]},"comp-45":{"id":"45","name":"D\u00e9fense des salari\u00e9s : transactions avec l'employeur, indemnit\u00e9s de d\u00e9part","type":"public2","childs":[]},"comp-46":{"id":"46","name":"D\u00e9fense des salari\u00e9s : accident, maladie professionnelle, invalidit\u00e9","type":"public2","childs":[]},"comp-48":{"id":"48","name":"Conseil en droit du travail et r\u00e9daction de contrats de travail","type":"public2","childs":[]},"comp-49":{"id":"49","name":"Droit du travail Employeurs : d\u00e9fense devant les Prudhommes","type":"public2","childs":[]},"comp-50":{"id":"50","name":"Droit du travail Employeurs : gestion proc\u00e9dures de licenciement et disciplinaires","type":"public2","childs":[]},"comp-51":{"id":"51","name":"Droit du travail Employeurs : conseil conditions de travail, s\u00e9curit\u00e9, hygi\u00e8ne, RI","type":"public2","childs":[]},"comp-55":{"id":"55","name":"Instances repr\u00e9sentatives du personnel","type":"public2","childs":[]}}},"comp-84":{"id":"84","name":"Droit de la s\u00e9curit\u00e9 sociale et de la protection sociale","type":"cnb1","childs":{"comp-52":{"id":"52","name":"Conseil et d\u00e9fense des Employeurs lors d'un accident du travail, maladie d'un salari\u00e9","type":"public2","childs":[]},"comp-53":{"id":"53","name":"Conseil et d\u00e9fense des Employeurs : pr\u00e9vention des risques, DUER, retraite, pr\u00e9voyance","type":"public2","childs":[]},"comp-54":{"id":"54","name":"Conseil et d\u00e9fense des Employeurs en droit de la s\u00e9curit\u00e9 sociale : URSAFF, RSI...","type":"public2","childs":[]}}}}},"comp-5":{"id":"5","name":"Droit des affaires, des contrats, et des soci\u00e9t\u00e9s commerciales","type":"public1","childs":{"comp-13":{"id":"13","name":"Droit commercial, des affaires et de la concurrence","type":"cnb1","childs":{"comp-56":{"id":"56","name":"R\u00e9daction de contrats commerciaux, de distribution, d'agent commercial","type":"public2","childs":[]},"comp-57":{"id":"57","name":"Litiges commerciaux, impay\u00e9s et recouvrement de cr\u00e9ances, arbitrage","type":"public2","childs":[]},"comp-60":{"id":"60","name":"Droit de la concurrence, rupture relations commerciales, concurrence d\u00e9loyale","type":"public2","childs":[]},"comp-61":{"id":"61","name":"Droit de la consommation, conditions g\u00e9n\u00e9rales de vente et d'utilisation (CGV et CGU)","type":"public2","childs":[]},"comp-62":{"id":"62","name":"Droit de la publicit\u00e9, image, sponsoring, partenariats, jeux concours","type":"public2","childs":[]},"comp-64":{"id":"64","name":"Entreprises en difficult\u00e9 : proc\u00e9dures de sauvegarde, redressement et liquidation judiciaire","type":"public2","childs":[]},"comp-65":{"id":"65","name":"Ventes de fonds de commerce et baux commerciaux","type":"public2","childs":[]},"comp-66":{"id":"66","name":"Contrats commerciaux internationaux, joint-venture, franchise, droit europ\u00e9en","type":"public2","childs":[]}}},"comp-98":{"id":"98","name":"Droit de l'arbitrage","type":"cnb1","childs":{"comp-57":{"id":"57","name":"Litiges commerciaux, impay\u00e9s et recouvrement de cr\u00e9ances, arbitrage","type":"public2","childs":[]}}},"comp-2":{"id":"2","name":"Droit des soci\u00e9t\u00e9s","type":"cnb1","childs":{"comp-58":{"id":"58","name":"Cr\u00e9ation de soci\u00e9t\u00e9s (SARL, SAS, SA, SCI, SCM...), statuts, immatriculation","type":"public2","childs":[]},"comp-59":{"id":"59","name":"Droit des soci\u00e9t\u00e9s : PV d'AG, cessions de parts et actions, augmentation capital...","type":"public2","childs":[]},"comp-63":{"id":"63","name":"Fusions et acquisitions, audit, capital-risque, LBO, droit boursier","type":"public2","childs":[]},"comp-64":{"id":"64","name":"Entreprises en difficult\u00e9 : proc\u00e9dures de sauvegarde, redressement et liquidation judiciaire","type":"public2","childs":[]}}},"comp-88":{"id":"88","name":"Droit du num\u00e9rique et des communications","type":"cnb1","childs":{"comp-62":{"id":"62","name":"Droit de la publicit\u00e9, image, sponsoring, partenariats, jeux concours","type":"public2","childs":[]}}},"comp-89":{"id":"89","name":"Droit bancaire et boursier","type":"cnb1","childs":{"comp-63":{"id":"63","name":"Fusions et acquisitions, audit, capital-risque, LBO, droit boursier","type":"public2","childs":[]},"comp-67":{"id":"67","name":"Droit bancaire et financier, contentieux et op\u00e9rations de financement","type":"public2","childs":[]}}},"comp-12":{"id":"12","name":"Droit international et de l'Union europ\u00e9enne","type":"cnb1","childs":{"comp-66":{"id":"66","name":"Contrats commerciaux internationaux, joint-venture, franchise, droit europ\u00e9en","type":"public2","childs":[]}}},"comp-10":{"id":"10","name":"Droit des garanties, des s\u00fbret\u00e9s et des mesures d'ex\u00e9cution","type":"cnb1","childs":{"comp-68":{"id":"68","name":"Droit des garanties, des s\u00fbret\u00e9s et des mesures d'ex\u00e9cution","type":"public2","childs":[]}}},"comp-91":{"id":"91","name":"Droit des transports","type":"cnb1","childs":{"comp-69":{"id":"69","name":"Droit des transports","type":"public2","childs":[]}}},"comp-99":{"id":"99","name":"Droit du sport","type":"cnb1","childs":{"comp-70":{"id":"70","name":"Droit du sport : contrats commerciaux, image, publicit\u00e9, agent, fiscalit\u00e9","type":"public2","childs":[]}}},"comp-100":{"id":"100","name":"Droit de la fiducie","type":"cnb1","childs":{"comp-71":{"id":"71","name":"Droit de la fiducie","type":"public2","childs":[]}}},"comp-83":{"id":"83","name":"Droit des associations et des fondations","type":"cnb1","childs":{"comp-72":{"id":"72","name":"Droit des associations et des fondations","type":"public2","childs":[]}}},"comp-7":{"id":"7","name":"Droit rural","type":"cnb1","childs":{"comp-73":{"id":"73","name":"Droit rural: cr\u00e9ation soci\u00e9t\u00e9s agricoles, baux ruraux, contrats commerciaux, hygi\u00e8ne","type":"public2","childs":[]}}}}},"comp-6":{"id":"6","name":"Droit du num\u00e9rique et des communications","type":"public1","childs":{"comp-88":{"id":"88","name":"Droit du num\u00e9rique et des communications","type":"cnb1","childs":{"comp-74":{"id":"74","name":"R\u00e9daction de contrats informatiques, logiciels, internet, CGV sites web","type":"public2","childs":[]},"comp-75":{"id":"75","name":"Contentieux en contrefa\u00e7on, concurrence d\u00e9loyale et parasitisme","type":"public2","childs":[]},"comp-80":{"id":"80","name":"Protection des donn\u00e9es personnelles et s\u00e9curit\u00e9 informatique","type":"public2","childs":[]}}},"comp-11":{"id":"11","name":"Droit de la propri\u00e9t\u00e9 intellectuelle","type":"cnb1","childs":{"comp-75":{"id":"75","name":"Contentieux en contrefa\u00e7on, concurrence d\u00e9loyale et parasitisme","type":"public2","childs":[]},"comp-76":{"id":"76","name":"Droits d'auteurs et droits voisins, contrats d'\u00e9dition, de cession","type":"public2","childs":[]},"comp-77":{"id":"77","name":"D\u00e9p\u00f4t de marques, INPI, recherches d'ant\u00e9riorit\u00e9, cession, licence, transfert","type":"public2","childs":[]},"comp-78":{"id":"78","name":"D\u00e9p\u00f4t de brevets, contrats de licence, r\u00e8glement de copropri\u00e9t\u00e9 de brevets","type":"public2","childs":[]},"comp-79":{"id":"79","name":"D\u00e9p\u00f4t de dessins et mod\u00e8les, recherches d'ant\u00e9riorit\u00e9","type":"public2","childs":[]}}},"comp-103":{"id":"103","name":"Droit de la protection des donn\u00e9es personnelles","type":"cnb1","childs":{"comp-80":{"id":"80","name":"Protection des donn\u00e9es personnelles et s\u00e9curit\u00e9 informatique","type":"public2","childs":[]}}}}},"comp-7":{"id":"7","name":"Droit fiscal, imp\u00f4ts, taxes","type":"public1","childs":{"comp-4":{"id":"4","name":"Droit fiscal et droit douanier","type":"cnb1","childs":{"comp-81":{"id":"81","name":"Assistance aux entreprises lors d'un contentieux ou contr\u00f4le fiscal","type":"public2","childs":[]},"comp-82":{"id":"82","name":"Conseil et ing\u00e9nierie fiscale aux entreprises et dirigeants","type":"public2","childs":[]},"comp-83":{"id":"83","name":"Fiscalit\u00e9 des particuliers : assistance \u00e0 d\u00e9claration d'imp\u00f4t sur le revenu, ISF, SCI","type":"public2","childs":[]},"comp-84":{"id":"84","name":"Fiscalit\u00e9 des particuliers : contr\u00f4le fiscal et contestation redressement","type":"public2","childs":[]},"comp-85":{"id":"85","name":"Fiscalit\u00e9 du patrimoine, optimisation fiscale, transmission, expatriation","type":"public2","childs":[]},"comp-86":{"id":"86","name":"Fiscalit\u00e9 immobili\u00e8re : SCI, sch\u00e9mas de d\u00e9tention des biens, LMP, Malraux","type":"public2","childs":[]},"comp-87":{"id":"87","name":"Fiscalit\u00e9 internationale : droits de douane, r\u00e9sidence fiscale, prix de transfert","type":"public2","childs":[]},"comp-88":{"id":"88","name":"TVA : sch\u00e9mas d'optimisation, remboursement, exon\u00e9rations","type":"public2","childs":[]}}}}},"comp-8":{"id":"8","name":"Droit des assurances, du dommage corporel et de la sant\u00e9","type":"public1","childs":{"comp-80":{"id":"80","name":"Droit du dommage corporel","type":"cnb1","childs":{"comp-95":{"id":"95","name":"D\u00e9fense des victimes d'accident et r\u00e9paration du pr\u00e9judice corporel","type":"public2","childs":[]},"comp-96":{"id":"96","name":"Mise en cause de la responsabilit\u00e9 m\u00e9dicale et indemnisation","type":"public2","childs":[]}}},"comp-82":{"id":"82","name":"Droit des assurances","type":"cnb1","childs":{"comp-97":{"id":"97","name":"Droit des assurances et contentieux avec l'assureur li\u00e9s aux sinistres","type":"public2","childs":[]}}},"comp-97":{"id":"97","name":"Droit de la sant\u00e9","type":"cnb1","childs":{"comp-98":{"id":"98","name":"Contrats et contentieux commerciaux dans le secteur de la sant\u00e9","type":"public2","childs":[]},"comp-99":{"id":"99","name":"Conseil corporate aux professionnels de la sant\u00e9 et structures d'exercice","type":"public2","childs":[]}}}}},"comp-9":{"id":"9","name":"Droit p\u00e9nal, droit routier et droit des \u00e9trangers","type":"public1","childs":{"comp-3":{"id":"3","name":"Droit p\u00e9nal","type":"cnb1","childs":{"comp-89":{"id":"89","name":"Droit p\u00e9nal : d\u00e9fense des auteurs et victimes devant les tribunaux","type":"public2","childs":[]},"comp-90":{"id":"90","name":"Droit p\u00e9nal des affaires et responsabilit\u00e9 p\u00e9nale du dirigeant","type":"public2","childs":[]},"comp-91":{"id":"91","name":"Droit de la presse, contentieux de la diffamation et de la vie priv\u00e9e","type":"public2","childs":[]}}},"comp-81":{"id":"81","name":"Droit des \u00e9trangers et de la nationalit\u00e9","type":"cnb1","childs":{"comp-92":{"id":"92","name":"Droit des \u00e9trangers, visas, titres de s\u00e9jour, permis travail, demande nationalit\u00e9","type":"public2","childs":[]}}},"comp-12":{"id":"12","name":"Droit international et de l'Union europ\u00e9enne","type":"cnb1","childs":{"comp-92":{"id":"92","name":"Droit des \u00e9trangers, visas, titres de s\u00e9jour, permis travail, demande nationalit\u00e9","type":"public2","childs":[]}}},"comp-79":{"id":"79","name":"Droit routier et de la circulation routi\u00e8re","type":"cnb1","childs":{"comp-93":{"id":"93","name":"Droit routier : suspension et annulation permis de conduire","type":"public2","childs":[]},"comp-94":{"id":"94","name":"Droit routier : contestation retrait de points, PV et amendes","type":"public2","childs":[]}}}}},"comp-10":{"id":"10","name":"Droit public, urbanisme et droit de l'environnement","type":"public1","childs":{"comp-49":{"id":"49","name":"Droit de l'environnement","type":"cnb1","childs":{"comp-100":{"id":"100","name":"Droit de l'environnement: normes, d\u00e9chets, immobilier durable, fiscalit\u00e9 verte","type":"public2","childs":[]}}},"comp-9":{"id":"9","name":"Droit public","type":"cnb1","childs":{"comp-101":{"id":"101","name":"Conseil juridique et assistance aux collectivit\u00e9s locales","type":"public2","childs":[]},"comp-102":{"id":"102","name":"Droit \u00e9lectoral et \u00e9lections professionnelles","type":"public2","childs":[]},"comp-103":{"id":"103","name":"Droit public \u00e9conomique, contrats et march\u00e9s publics","type":"public2","childs":[]},"comp-104":{"id":"104","name":"Droit public europ\u00e9en et communautaire","type":"public2","childs":[]},"comp-105":{"id":"105","name":"Droit de la fonction publique et carri\u00e8res des agents","type":"public2","childs":[]}}},"comp-12":{"id":"12","name":"Droit international et de l'Union europ\u00e9enne","type":"cnb1","childs":{"comp-104":{"id":"104","name":"Droit public europ\u00e9en et communautaire","type":"public2","childs":[]}}}}},"comp-11":{"id":"11","name":"Droit international et de l'Union europ\u00e9enne","type":"public1","childs":{"comp-12":{"id":"12","name":"Droit international et de l'Union europ\u00e9enne","type":"cnb1","childs":{"comp-106":{"id":"106","name":"Contentieux devant les juridictions europ\u00e9ennes","type":"public2","childs":[]},"comp-107":{"id":"107","name":"Contentieux internationaux des affaires","type":"public2","childs":[]},"comp-108":{"id":"108","name":"Droit europ\u00e9en de la concurrence","type":"public2","childs":[]}}}}},"comp-12":{"id":"12","name":"Proc\u00e9dure civile, proc\u00e9dure d'appel","type":"public1","childs":{"comp-101":{"id":"101","name":"Proc\u00e9dure civile","type":"cnb1","childs":{"comp-30":{"id":"30","name":"Proc\u00e9dure civile : assignations, ex\u00e9cution jugements, r\u00e9f\u00e9r\u00e9s TGI, TI...","type":"public2","childs":[]}}},"comp-102":{"id":"102","name":"Proc\u00e9dure d'appel","type":"cnb1","childs":{"comp-33":{"id":"33","name":"Proc\u00e9dure d'appel","type":"public2","childs":[]}}}}}}

Publié le 24/04/2026

Mises en demeure et sanctions de la DREAL : pourquoi se faire assister par un avocat ?

Article juridique - Droit de l'environnement

Par Me Mathilde LE GUEN

Mises en demeure et sanctions de la DREAL : pourquoi se faire assister par un avocat ?

Recevoir une mise en demeure de la DREAL, c’est entrer dans le registre de la police administrative environnementale : délais souvent très courts, travaux parfois coûteux, risques de réduction ou d’arrêt d’activité et, en cas de non‑exécution, menaces d’amendes, d’astreintes ou de consignations.

Dans ce contexte, l’avocat intervient d’abord pour vérifier la légalité de la décision (compétence, motivation, proportionnalité, respect du contradictoire) et pour en mesurer précisément les conséquences opérationnelles et financières.

Son rôle est ensuite d’ouvrir des marges de manœuvre : proposer des échéanciers réalistes, hiérarchiser les mesures demandées, formaliser des engagements crédibles et, si nécessaire, contester les décisions les plus préjudiciables par des recours gracieux, des référés ou un recours au fond. En matière de sanctions administratives (amendes, astreintes, consignations), il s’agit toujours de trouver le bon équilibre entre négocier quand c’est possible et contester quand c’est nécessaire, afin de protéger l’activité tout en sécurisant durablement la conformité du site.