The debate: illegal immigration and Spain's housing prices

Illegal immigration as a cause of housing prices, under debate

«Illegal immigration is behind the rising cost of housing». It is one of the claims running through the debate and, given the figures being cited, it works better as a slogan than as a settled diagnosis. The issue has peine a discussion that crosses demographics, housing supply and migration policy.

The claim has an institutional echo. Vox's account shared an interview with Carlos H. Quero in which he summed it up like this: «What the Government has done, as we have seen with the housing law, with forced lease extensions, with the suspension of evictions... has been to leave the vulnerable out of the game». Two fronts intersect in the debate: the entry of people without authorization and a housing policy that, according to this reading, discourages supply.

How many foreign residents are actually in Spain?

The figures circulating are uneven and should be separated. One participant cites more than 17 million immigrants in Spain and claims that one third of those born there are of foreign origin. Another points to a net population increase of 150,000 inhabitants per quarter, equivalent to adding a city the size of Salamanca every three months. Both figures are attributed to reports in La Vanguardia and El Mundo from May 2023.

On that flow, another participant adds that more than half of those living in rented housing were born outside Spain. The figure illustrates the group's concentration in the rental market, but it does not by itself prove the cause-and-effect relationship it is being saddled with.

The figures behind the migration argument

• More than 17 million immigrants in Spain
• One third of those born are of foreign origin
• 150,000 inhabitants of net increase per quarter
• 1.8 million irregular entries per year, according to the figure that keeps being repeated

The last figure, 1.8 million irregular entries a year, is the most sweeping and the hardest to verify. It does not come from an official body being cited, but from a calculation circulating in political conversation. If accurate, its magnitude would be enough to reshape any European border policy.

The link no registry measures precisely

Here is the weak point of the claim. Distinguishing how many entries are regular and how many irregular, how many translate into housing demand and in which market segment, requires a registry that no administration publishes in detail. Without that breakdown, attributing the rise in prices directly to illegal immigration leaves out other levers the debate itself mentions: the lack of land or building and a rental supply that is not growing.

Some go further and argue that the problem is not the number, but any entry at all.

With housing at the center of the debate, the claim linking immigration and prices has political traction. Whether it withstands statistical scrutiny is another matter: this issue will be settled at the ballot box before it is settled in the data.