More than 15,000 military constructions still dot the French borders. Casemates buried under wheat fields, concrete blocks camouflaged in the Alsatian forests, underground galleries which run thirty meters deep under the Lorraine hills. Wikimaginot, the reference site on the subject, today lists no less than 15,046 structures, blockhouses, shelters and other constructions from the Maginot line. And a large part of them belong to individuals, municipalities or associations, without the general public being informed.
The received idea is tenacious: the Maginot Line would remain a property of the French army, a military heritage under cover, inaccessible and frozen. The reality is quite different. If some works are still owned by the army, the majority have been bought by municipalities or are private property. This shift took place discreetly, from the 1960s, and it produced a heritage situation that few French people suspect: you can legally buy a fragment of this “Great Wall of France”, galleries included, on Le Bon Coin or via an agency classic real estate.
À retain
- The Maginot Line no longer belongs to the army: where have these 15,000 structures really gone?
- The selling prices of small forts will surprise you: how much does a historic blockhouse really cost?
- Why did the French army start to abandon its masterpiece in the 1960s?
A concrete titan built in less than ten years
To understand the extent of the phenomenon, we need to go back in time. On January 14, 1930, André Maginot had Parliament vote for a budget of 2.9 billion francs to build, in five years, a new fortified defense line. Over more than 700 kilometers, from the Ardennes to the south of Alsace, but also from Savoie to the Cote d’Azur, this “Great Wall” of concrete and steel will be made up of three types of artillery works, partially buried and linked together by galleries underground also giving access to barracks, ammunition bunkers and electricity production plants. The site will employ up to 20,000 workers at any one time.
The result is dizzying. A total of 44 large artillery structures, 62 medium infantry structures, 365 casemates, 17 observatories, 89 interval shelters, more than 150 turrets of all types, thousands of light blockhouses and an entire rear infrastructure of railways, military roads and barracks were built. The underground galleries reach more than 100 km in length, which is comparable to the length of the lines of the Paris metro existing in 1935. Three years to complete them, compared to forty for the Paris metro. A figure that says everything about the industrial ambition of the project.
These forts are not simple shelters. These works are made up of a set of blocks on the surface, most often linked together by deeply buried galleries, with common underground workings: stores, barracks, factories, etc. The largest housed up to 1,000 men, with their own electrical generators, kitchens, infirmaries, internal trains Narrow gauge. Entire cities underground, built to last for centuries.
The great decommissioning: when the army disengaged
June 1940. The Wehrmacht bypasses the line through the Ardennes, considered impenetrable. The Maginot, undefeated militarily, lost its strategic raison d’être overnight. After the war, these constructions were used during the Second World War, were reused during the Cold War before being gradually abandoned by the French army. The Rochonvillers structure was kept by the French army as a command center until the 1990s, before being deactivated following the disappearance of the Soviet threat. After the Cold War, the reasons for retaining these behemoths evaporated one by one.
The transfer movement began in the 1960s and 1970s. The small structures or casemates have all, apart from a few exceptions, been either transferred to municipalities or sold to private individuals, since the 1960s and 1970s. The mechanism is simple: once it leaves the military domain, a blockhouse or casemate enters into common real estate law. Once in the private domain, these constructions simply enter the private real estate market, just as if you wanted to buy a villa or a castle. The normal procedure, with notary, authentic deed and sometimes even an energy performance diagnosis, even if the exercise takes a slightly absurd turn for a blockhouse without windows.
Today, the dividing line between the public domain and the private domain follows the size of the works. Small works, without artillery blocks, are today either private or communal. The large structures, large complexes with 6 to 19 connected combat blocks, are essentially still the property of the army. The army keeps the monsters, individuals inherit the rest. And “the rest” is the overwhelming majority of the 15,000 constructions recorded.
Buying a fort: simpler than you think, more complicated than you hope
Concretely, how do we acquire a work? You have to be on the lookout on specialized sites or forums: some time ago, Lembach’s small work, made up of 3 connected blocks and a rear entrance, was reputed to be for sale by its owner. Others go through traditional channels. The price of a casemate or a small structure can be compared to that of a studio in a big city: a few tens of thousands of euros for a bare structure, sometimes less. A fort with galleries in the Grand Est can change hands for less than the cost of an apartment in Paris.
But purchasing is only the beginning of the journey. Obtaining land or the right to occupy land to maintain a place is very difficult, especially when the project has not been decided and thought through for a long time. The amount of work is often underestimated. The flooded galleries, the destroyed electrical circuits, the omnipresent rust: the Maginot line had been disused since 1968 and abandoned since then. In Schoenenbourg, the lamentable abandonment had transformed this work once animated by its 620 occupants into a miserable ruin: damaged and vandalized electrical installations, galleries flooded with water and mud, omnipresent rust, small equipment missing or missing. stolen. This table, valid for Schoenenbourg in the 1980s, still describes the state of numerous works in private hands today.
As for the large structures still held by the army, the situation is different. At this stage, the army is not selling its major works for reasons of cost (depollution obligation) or administrative and legal constraints. Some are subject to precarious employment agreements with enthusiast associations. The Brehain work, made up of surface structures for access to the site with two separate entrances, and underground galleries, is thus the subject of an agreement with a private party, a unique case according to specialists.
A heritage that is reinventing itself, slowly
Several associations took charge of certain works, restored them and thus opened to the public a part of French history that is still largely unknown today. Today there are 80 tourist sites spread along the borders of France. Some welcome thousands of visitors per weekend. Others remain closed, between two owners, in a legal gray zone where the passionate volunteer and the disillusioned individual meet without really understanding each other.
The case of Fermont’s work illustrates the best that the model can produce. It is one of the major artillery works, characterized by 8 combat blocks, a garrison of more than 600 men and a network comprising more than 10 km of galleries 30 meters underground. In 2024, a massive communication campaign allowed attendance to increase by 15% and revenues to increase by 35% compared to 2023. A military fort transformed into a profitable heritage attraction, managed by volunteers under agreement with the Ministry of the Armed Forces. Proof that reconversion is possible, provided you put in the time and effort.
The paradox of the Maginot Line lies entirely in this contrast: built to last forever, financed to the tune of billions of francs at the time, only the Hochwald structure remains in active service today as a hardened command installation for the French Air Force. The rest belongs to rural communities, to associations of passionate retirees, to farmers who have discovered a blockhouse at the bottom of their field, or to individuals who have had the curiosity to buy a piece of history for the price of a used vehicle. Every Maginot construction has a legal owner, whether public or private. This owner, in hundreds of cases, is not the State, but your village neighbor in Moselle.
Sources : locations.immobilier-etat.gouv.fr | shoppingparticipatif.com
