Spain's vacant homes hit 3.8m, yet prices stay high
INE data reveals 400k more empty units in Spain, totaling 3.8 million. Vacancy rates reach 6.3% in Madrid and nearly 10% in Barcelona, but housing costs remain stubbornly high.
English · Original discussion in Spanish · Published
3.8 million vacant homes as prices continue to rise
The INE (Spain’s National Statistics Institute) has identified 400,000 additional uninhabited properties, pushing the official count of vacant homes in Spain to 3.8 million. The paradox is textbook: there is a surplus of bricks while city centers lack residents, yet rental and purchase prices refuse to drop. According to agency data, Madrid accounts for over 97,100 empty homes—6.3% of its total stock—and Barcelona has 75,476, nearly 10%. Some argue that building more has been futile while supply is hoarded or kept firmly shut.
What INE data says about vacant housing
The population and housing census published by the INE raises the stock of uninhabited properties to 3.8 million as of January 1, 2021, compared to 3.4 million in the previous 2011 study. The comparison is not homogeneous: the agency applied new electricity consumption criteria, detecting homes previously overlooked. Nevertheless, the sudden discovery of 400,000 units suggests the vacant stock was always larger than statistics indicated. In Barcelona, beyond the 75,476 uninhabited properties, another 16,000 have electricity consumption lower than that of a fridge. In Madrid, more than 27,000 homes with this negligible usage join the 97,100 officially empty ones.
The map does not lie: The bulk of growing vacant housing is concentrated in small municipalities and areas where no one wants to live, not in capital city centers. This nuance debunks the easy headline that Madrid’s rental crisis can be solved with empty flats. Closed flats are where demand is absent, while needed homes are where construction is lacking.
Why prices don't fall despite surplus flats
Classical economic theory states that excess supply crashes prices. Not so in housing. Some argue the real estate market defies simple supply and demand models, and the numbers support them: in Barcelona’s commuter towns like Santa Coloma, Badalona, or Hospitalet, populations have fallen 5-10% from their 1980s peak, the housing stock is larger than then, yet living without a perpetual mortgage remains impossible. People have moved to farther but well-connected areas like Terrassa or Sabadell; once those fill up, they will reproduce the same problem.
The hoarding argument gains weight. According to circulating analysis, someone securing a rental contract in Barcelona can sublet it by rooms at higher prices, displacing middle-income tenants and further straining the market. New decent housing is absorbed by investment; indecent housing by necessity. In this context, building more is pouring water into the sea.
Property tax as leverage: multiplying it tenfold to free up flats
The most repeated proposal involves the Impuesto sobre Bienes Inmuebles (IBI), Spain’s property tax. A massive IBI on vacant homes would force owners to sell or rent them, freeing underused space and allowing municipalities to rely on local revenue rather than state transfers. The Housing Law already includes a 150% surcharge for properties in tensioned zones left unsold or unrented for over two years. Official logic is that scarcity is cured by taxation. Owner logic differs: if the flat yields no return, it stays closed and waits.
Proponents of fiscal sticks argue high IBI reduces municipal debt and funds public services. Critics respond that owners pass costs to tenants or simply refuse to rent. Amidst this lies a stubborn fact: current IBIs are too low to incentivize moving the stock.
Second, third, fourth homes: the tourist rental business
Debate intensifies when discussing accumulation. An empty second home bothers no one, but when an owner holds the third, fourth, and fifth for tourist rentals, things change. Cities like Madrid and Barcelona have seen parts of their residential stock converted into party accommodation and amusement parks. In London, over half of new homes are vacant and owned by foreigners, interpreted by some as legal security and by others as speculative windfalls.
Owner defense is simple: if you can hold €100,000 in a bank losing value to inflation, why not hold it in a flat? Tenant response is simpler: because that empty flat is a home someone needs. Meanwhile, the State bailed out bricks with public money and now asks taxpayers to repay the rescue.
Demographic winter and immigration as excuse
Some point to demographic decline as proof of housing surplus. Others note that 50% of buyers are of non-EU origin, inflating demand. Both theses coexist unresolved. Facts show urban center populations falling, vacant stock rising, and prices static. The prevailing conclusion is that the issue isn’t brick quantity, but who controls it and for what purpose.
How long can a market rewarding closed flats and penalizing renting sustain itself?
The INE (Spain’s National Statistics Institute) has identified 400,000 additional uninhabited properties, pushing the official count of vacant homes in Spain to 3.8 million. The paradox is textbook: there is a surplus of bricks while city centers lack residents, yet rental and purchase prices refuse to drop. According to agency data, Madrid accounts for over 97,100 empty homes—6.3% of its total stock—and Barcelona has 75,476, nearly 10%. Some argue that building more has been futile while supply is hoarded or kept firmly shut.
What INE data says about vacant housing
The population and housing census published by the INE raises the stock of uninhabited properties to 3.8 million as of January 1, 2021, compared to 3.4 million in the previous 2011 study. The comparison is not homogeneous: the agency applied new electricity consumption criteria, detecting homes previously overlooked. Nevertheless, the sudden discovery of 400,000 units suggests the vacant stock was always larger than statistics indicated. In Barcelona, beyond the 75,476 uninhabited properties, another 16,000 have electricity consumption lower than that of a fridge. In Madrid, more than 27,000 homes with this negligible usage join the 97,100 officially empty ones.
The map does not lie: The bulk of growing vacant housing is concentrated in small municipalities and areas where no one wants to live, not in capital city centers. This nuance debunks the easy headline that Madrid’s rental crisis can be solved with empty flats. Closed flats are where demand is absent, while needed homes are where construction is lacking.
Why prices don't fall despite surplus flats
Classical economic theory states that excess supply crashes prices. Not so in housing. Some argue the real estate market defies simple supply and demand models, and the numbers support them: in Barcelona’s commuter towns like Santa Coloma, Badalona, or Hospitalet, populations have fallen 5-10% from their 1980s peak, the housing stock is larger than then, yet living without a perpetual mortgage remains impossible. People have moved to farther but well-connected areas like Terrassa or Sabadell; once those fill up, they will reproduce the same problem.
The hoarding argument gains weight. According to circulating analysis, someone securing a rental contract in Barcelona can sublet it by rooms at higher prices, displacing middle-income tenants and further straining the market. New decent housing is absorbed by investment; indecent housing by necessity. In this context, building more is pouring water into the sea.
Property tax as leverage: multiplying it tenfold to free up flats
The most repeated proposal involves the Impuesto sobre Bienes Inmuebles (IBI), Spain’s property tax. A massive IBI on vacant homes would force owners to sell or rent them, freeing underused space and allowing municipalities to rely on local revenue rather than state transfers. The Housing Law already includes a 150% surcharge for properties in tensioned zones left unsold or unrented for over two years. Official logic is that scarcity is cured by taxation. Owner logic differs: if the flat yields no return, it stays closed and waits.
Proponents of fiscal sticks argue high IBI reduces municipal debt and funds public services. Critics respond that owners pass costs to tenants or simply refuse to rent. Amidst this lies a stubborn fact: current IBIs are too low to incentivize moving the stock.
Second, third, fourth homes: the tourist rental business
Debate intensifies when discussing accumulation. An empty second home bothers no one, but when an owner holds the third, fourth, and fifth for tourist rentals, things change. Cities like Madrid and Barcelona have seen parts of their residential stock converted into party accommodation and amusement parks. In London, over half of new homes are vacant and owned by foreigners, interpreted by some as legal security and by others as speculative windfalls.
Owner defense is simple: if you can hold €100,000 in a bank losing value to inflation, why not hold it in a flat? Tenant response is simpler: because that empty flat is a home someone needs. Meanwhile, the State bailed out bricks with public money and now asks taxpayers to repay the rescue.
Demographic winter and immigration as excuse
Some point to demographic decline as proof of housing surplus. Others note that 50% of buyers are of non-EU origin, inflating demand. Both theses coexist unresolved. Facts show urban center populations falling, vacant stock rising, and prices static. The prevailing conclusion is that the issue isn’t brick quantity, but who controls it and for what purpose.
How long can a market rewarding closed flats and penalizing renting sustain itself?
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Summary of a discussion on Burbuja.info - Foro de economía, actualidad y política., translated from Spanish and reviewed before publication. Read the full discussion (111 replies).
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