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Metal Detecting Laws in France

By the LuckyFind team Sourced from national law and official guidance
Sources checked October 7, 2026 ~6 min read

Short version: if you're hunting for history, France says no without a research permit. Since 1989 the law has said that nobody may use a metal detector to look for objects of historical, artistic or archaeological interest without a permit from the regional prefect, and the Ministry of Culture grants those to people with scientific credentials and a real research project. The ministry's own leaflet puts it bluntly: la détection n'est pas un loisir (detecting is not a hobby). The rule is about searching for the past, though: looking for your own lost keys needs only the landowner's OK, and some coastal départements license hobby detecting on their beaches. On land that has changed hands since July 2016, anything archaeological you find is presumed to belong to the State, and a detector find made without authorization gives you no claim anywhere. Here's the rulebook, land by land.

Can I detect in France?

The short answer for each kind of land. Tap a card for the detail and the rule’s own words.

Open in many areas without a permitPermit, registration, or designated beaches onlyProhibited or effectively closed

The rules, land by land

Anywhere: national heritage law

Research permits only

Using a metal detector to look for anything of historical, artistic or archaeological interest needs a permit from the regional prefect, and France grants it only to people with scientific credentials and a proper research project. Searching only for modern losses, like your own keys or jewelry, is outside that rule (the landowner's permission is still needed), and some coastal départements license hobby detecting on their beaches.

  • applies everywhere, public or private land, whether or not the place is a known archaeological site (Code du patrimoine, Article L542-1)
  • the regional prefect authorizes by order; the request gives your identity, skills and experience plus the place, scientific objective and length of the survey (Article R542-1)
  • the Ministry of Culture says it requires scientific competence and a reasoned research project, and that relaxing the law is not on the table (Senate answer, February 2022)
  • you apply through the regional archaeology service (DRAC) as part of a request for a programmed archaeological operation; at sea, through the DRASSM
  • on land you don't own, attach the owner's written consent (Article R542-1)
  • fine: a 5th-class contravention, up to 1,500 euros, and up to 3,000 euros for a repeat offense; the detector can be confiscated (Article R544-3; Ministry of Culture)
  • digging is treated as an unauthorized excavation (fine up to 7,500 euros, Article L544-1)
  • every detector ad and user manual sold in France must remind buyers of this ban (Article L542-2)
  • searching only for your own lost keys or jewelry is outside the rule and needs only the landowner's permission, according to the national forest office (ONF); mayors and prefects can ban detectors by order, notably where many war remains survive (Aisne, Oise, Somme and Meuse), according to the ONF
  • hobby beach detecting is licensed by some coastal départements (see beaches)
What the rule says
“C'est pour cette raison que l'État requiert, pour délivrer l'autorisation d'utiliser un détecteur de métaux à des fins de recherche archéologique, non seulement une compétence scientifique, mais également un projet de recherche raisonné”

Keeping finds

Prohibited

On land that has changed hands since July 2016, archaeological finds are presumed to belong to the French state, and anything you dig up with a detector without an authorization can never count as a lucky chance find, so you have no claim to it.

  • movable archaeological finds are presumed State property from discovery during an archaeological operation, and for chance finds from the moment their scientific interest is recognized (Article L541-4, in force since July 9, 2016)
  • after a chance find is declared, the object stays in State custody while experts decide, for up to five years
  • the presumption covers land whose ownership changed after July 2016; on land that has not changed hands since then (often the case in forests), chance finds are shared between the finder and the landowner
  • the Civil Code's treasure rule (Article 716) gives treasure to a finder on their own land and splits it half and half on someone else's land, but only for things found 'by pure chance'
  • the national forest office (ONF) says finds made by searching with a detector without authorization can never be recognized as chance finds, and the finder can claim nothing
  • archaeological remains in the ground (walls, structures) belong to the State; the landowner may be compensated
  • underwater and foreshore finds (maritime cultural property) whose owner can't be found belong to the State; a finder who declared it may get a reward (Articles L532-2, L532-6)
  • ordinary lost property still belongs to whoever lost it; some towns require you to hand in found items
What the rule says
“Ces biens archéologiques mobiliers sont présumés appartenir à l'Etat dès leur mise au jour au cours d'une opération archéologique et, en cas de découverte fortuite, à compter de la reconnaissance de l'intérêt scientifique justifiant leur conservation.”

Reporting finds

Must be reported

Found something that could interest history, art, archaeology or coin collectors? Both you and the landowner must declare it right away to the town hall, which passes it to the prefect. At sea or on the foreshore, leave it in place and declare it within 48 hours.

  • covers chance finds of ruins, burials, inscriptions, mosaics and objects of prehistoric, historical, artistic, archaeological or numismatic interest, however they came to light
  • declare immediately to the mayor of the commune; the mayor forwards it to the prefect without delay; whoever is keeping the objects must declare them too
  • the landowner is responsible for protecting immovable remains, and whoever holds the objects is responsible for them, until the State decides
  • maritime cultural property (wrecks, remains on the foreshore or sea bed): leave it in place, do not damage it, and declare it within 48 hours of the find or of reaching the first port (Article L532-3); the declaration can be made online
  • failing to declare is punishable by a fine of up to 3,750 euros (Article L544-3, per ONF and the Pas-de-Calais prefecture)
  • the Ministry of Culture told the Senate that the duty applies however the find was made
What the rule says
“Lorsque, par suite de travaux ou d'un fait quelconque, ... des objets pouvant intéresser la préhistoire, l'histoire, l'art, l'archéologie ou la numismatique sont mis au jour, l'inventeur de ces vestiges ou objets et le propriétaire de l'immeuble où ils ont été découverts sont tenus d'en faire la déclaration immédiate au maire de la commune”

Beaches & foreshore

Varies by site

Beaches are part of the State's maritime public domain, and each département's sea and coast office sets the rules: in Nord and Pas-de-Calais you need its authorization plus the town's OK, some beaches ban detectors outright, and searching for anything old needs an archaeology permit from the DRASSM.

  • on the maritime public domain, any activity not expressly authorized is prohibited, so there is no tacit permission (Pas-de-Calais prefecture)
  • Nord: send a written request to the DDTM naming the beaches where you want to detect as a hobby; you also need the mayor's agreement
  • Nord: banned on the beaches of Leffrinckoucke, Zuydcoote, Ghyvelde and Bray-Dunes by town order; in Dunkerque (Malo-les-Bains), banned 10 a.m. to 7 p.m. from April 15 to September 30, and on Wednesdays, weekends and school holidays the rest of the year
  • Pas-de-Calais: apply online to the DDTM, get the town's authorization too, and hand anything you find to lost property; the page we read said authorizations ran to December 31, 2024
  • watch for wartime munitions uncovered by the tides: don't touch them, keep away and call the gendarmerie
  • searching for wrecks or anything of prehistoric, historical, artistic or archaeological interest on the foreshore or sea bed needs the DRASSM's authorization, which goes to research projects (Article L532-7); declare any such find within 48 hours
  • other départements were not checked; the Pyrénées-Atlantiques prefecture page could not be opened
What the rule says
“IMPORTANT : En complément de l'autorisation de la DDTM, vous devez obtenir l'autorisation de la commune du ou des lieux de détection. En cas de détection archéologique vous devez demander également l'avis du Département des recherches archéologiques subaquatiques et sous-marines (DRASSM)”

Protected monuments

Research permits only

Detecting on or around protected monuments and archaeological sites falls squarely under the national rule: without the prefect's research authorization it's an offense, and damaging or looting a site is a serious crime.

  • the national rule (Article L542-1) applies whether or not the site is a known archaeological site, and the authorization goes only to research projects
  • destroying, damaging or degrading archaeological heritage, and stealing archaeological property, are punishable by up to 7 years in prison and a 100,000-euro fine (Code pénal 322-3-1, 311-4-2, per the ONF)
  • intruding on an archaeological site can be fined up to 3,000 euros (Code pénal R645-13, per the Ministry of Culture leaflet)
  • digging without authorization is an unauthorized excavation (fine up to 7,500 euros)
What the rule says
“Nul ne peut utiliser du matériel permettant la détection d'objets métalliques, à l'effet de recherches de monuments et d'objets pouvant intéresser la préhistoire, l'histoire, l'art ou l'archéologie, sans avoir, au préalable, obtenu une autorisation administrative délivrée en fonction de la qualification du demandeur ainsi que de la nature et des modalités de la recherche.”

National parks & nature reserves

Research permits only

National parks add their own bans on top of the national rule. In the core of the Parc national de forêts, detectors are banned except for authorized scientific missions and a few utility jobs, and the Calanques' rules forbid disturbing or taking any archaeological object.

  • the national rule applies in every park: searching for historical or archaeological objects needs the prefect's research authorization
  • Parc national de forêts (core): banned except for a scientific mission authorized by the competent authority, boundary-marker searches, utility networks, and defense or civil-security operations
  • Parc national des Calanques (core): no harming, holding, carrying or taking out of the core any object belonging, or likely to belong, to its historical, architectural or archaeological heritage; minerals and fossils too
  • the other national parks' rules were not read
What the rule says
“17. L’utilisation de détecteurs de métaux est interdite, sauf dans les cas suivants : 1° Mission scientifique ayant obtenu l’autorisation de l’autorité administrative compétente”

State forests (ONF)

Research permits only

In state forests the national forest office (ONF) tells its staff to refuse any detecting request that isn't part of a scientific project backed by the regional archaeology service. In the Paris-west forests it's banned outright.

  • forêts domaniales (state forests): requests outside a DRAC-backed scientific project are refused for safety and to protect archaeological remains
  • all state forests of the ONF's Île-de-France Ouest agency: detectors banned, partly to protect biodiversity
  • other public forests (for example town forests): the owner decides, after the ONF's technical advice
  • the national rule still applies: searching for anything of historical interest needs the prefect's research authorization
  • ONF staff who find someone detecting will ask to see both the landowner's and the prefect's authorizations, and alert the police and the DRAC
  • in state forests the ONF can press charges for damage such as holes dug by detectorists
What the rule says
“En forêt domaniale, il convient de vérifier auprès de la DRAC* (Service régional de l’archéologie) si cette demande rentre bien dans le cadre d’un projet scientifique qu’elle soutient. Sinon, il faut la refuser pour des raisons de sécurité et de protection des vestiges archéologiques.”

Private land

Research permits only

Your own field or a friend's farm is no loophole. You always need the landowner's permission, and if you're looking for anything old you also need the prefect's research authorization, with the owner's written consent attached.

  • the national rule applies on private land exactly as on public land
  • the owner's written consent (and that of anyone else with rights over the land) goes in the authorization file (Article R542-1)
  • any detector use, whatever the purpose, needs the owner's prior permission (ONF, citing Civil Code Article 544)
  • looking only for your own lost keys or jewelry needs just the owner's permission, according to the ONF
  • the Ministry's own pages describe it as a double authorization: the State's and the landowner's
What the rule says
“Lorsque les prospections doivent être effectuées sur un terrain n'appartenant pas à l'auteur de la demande, ce dernier doit joindre à son dossier le consentement écrit du propriétaire du terrain et, s'il y a lieu, celui de tout autre ayant droit.”

Even where detecting is allowed, archaeological and historic sites are protected, and you must fill every hole and follow posted rules. Always confirm the current rule with the land manager.

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Please read: this is general information for detectorists, not legal advice. Rules change and vary by individual park, city, and agency. We cite the official sources below, but always confirm the current rule with the specific land manager before you detect — and when in doubt, ask first. Sources checked October 7, 2026; see the source notes for scope.

One rule for every field, forest and beach

The core rule is Article L542-1 of the Code du patrimoine (heritage code): no metal detector searches for objects of prehistoric, historical, artistic or archaeological interest without an administrative authorization. The regional prefect grants it, and the request has to describe your skills, experience and scientific objective. When a senator asked in 2022 whether the rule could be relaxed for hobbyists, the Ministry of Culture answered that it requires scientific competence and a reasoned research project, and that loosening the law was not an option.

It applies on private land as much as public land, on known archaeological sites or not. On someone else's land the owner's written consent goes in the file too. Breaking the rule is a fine of up to 1,500 euros (3,000 for a repeat offense), and the detector can be confiscated; dig a hole and it can count as an unauthorized excavation, with fines up to 7,500 euros. France even makes every detector ad and user manual remind you of the ban. The one gap the national forest office (ONF) describes: looking for your own lost keys or jewelry needs only the landowner's permission.

Beaches, forests and national parks

Beaches belong to the State's maritime public domain, and each coastal département's sea and coast office (DDTM) sets the rules. In Pas-de-Calais and Nord you need the DDTM's authorization and the town's OK, and several Nord beaches ban detectors outright. Looking for wrecks or anything old on the foreshore or sea bed is another matter: that needs an archaeology permit from the DRASSM, the national underwater archaeology department. And on the Channel coast, tides still uncover wartime munitions, so never touch one; call the gendarmerie.

In state forests the ONF tells its staff to refuse detecting requests that aren't part of a scientific project backed by the regional archaeology service, and the Paris-west forests ban detectors entirely. National parks pile on their own rules: the Parc national de forêts bans detectors in its core except for authorized science, and the Calanques forbid disturbing or taking any archaeological object.

Finds and reporting

Any chance find that might interest history, art, archaeology or coin collectors must be declared right away to the town hall, by both the finder and the landowner (Article L531-14). Under a 2016 reform, archaeological objects found on land that has changed hands since then are presumed to belong to the State once their scientific interest is recognized, and the State keeps them while it decides, for up to five years; on land that hasn't changed hands, a genuine chance find is shared between the finder and the landowner. The Civil Code's old treasure rule, half for the finder and half for the landowner, covers only things found by pure chance, and the ONF says detector finds made without authorization can never count as chance finds. On the foreshore or at sea, leave the find in place and declare it within 48 hours.

Sources

Official and statutory sources this page is based on (source check: October 7, 2026):

Beach rules were read for two départements (Nord, Pas-de-Calais); other coastal départements were not checked.

Keep your permitted France spots organized

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New to LuckyFind? Follow the first-hunt checklist, then learn how to record a hunt and add finds.

Frequently Asked Questions

Is metal detecting legal in France?
Using a detector to look for objects of historical, artistic or archaeological interest needs a research permit from the regional prefect, which goes to people with scientific credentials and a research project. Searching only for modern lost items is outside that rule and needs the landowner's permission, and some coastal départements license hobby detecting on their beaches.
Can I detect on a French beach?
It depends on the département. Nord and Pas-de-Calais require an authorization from the local sea and coast office (DDTM) plus the town's agreement, and several beaches ban detectors outright. Searching for wrecks or old objects needs an archaeology permit from the DRASSM.
Can I detect on private land with the owner's permission?
Only to look for something like your own lost keys or jewelry. Searching for anything old still needs the prefect's research permit, with the owner's written consent attached to the application.
Who owns what I find in France?
On land that has changed hands since July 2016, archaeological objects are presumed to belong to the State once their scientific interest is recognized; elsewhere a genuine chance find is shared with the landowner. Finds made with a detector without authorization don't count as chance finds, so the finder has no claim. The Civil Code's half-and-half treasure rule covers only things found by pure chance.
What happens if I detect without a permit?
Using a detector to search for historic objects without authorization is fined up to 1,500 euros, or 3,000 euros for a repeat offense, and the detector can be confiscated. Digging can count as an unauthorized excavation, and damaging an archaeological site can mean prison.

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