Buildings classified as F/2 ruins have passed 635,000, up 129% since 2011. Behind the cadastral figure lies a gap between recovery cost and end value affecting a growing share of the country.
Italy counted 635,754 buildings registered as unità collabenti in 2025. The figure was 629,022 a year earlier and just above 278,000 in 2011. The data, compiled by Confedilizia from Agenzia delle Entrate records, points to a 129% increase over fifteen years, close to a doubling of the stock the cadastre treats as incapable of generating income.
What category F/2 actually means
F/2 is not an aesthetic judgement on the state of repair. It identifies a building with no cadastral income because it cannot be used or let: no roof, compromised structure, decay beyond ordinary maintenance. Registration carries a specific fiscal consequence, namely exemption from IMU on the building, while the tax remains due on the underlying land where that land is developable.
The relevant threshold lies elsewhere. As long as a property is merely declared unfit for use, IMU is still owed, albeit at a reduced rate. Exemption begins with formal F/2 classification. An owner holding an asset that produces no income and has no realistic recovery path therefore faces an asymmetric incentive: completing the decay pays better than arresting it.
Confedilizia's reading, and its limits
The owners' association links the curve to the introduction of IMU in 2011 and calls the situation a national emergency. Its president, Giorgio Spaziani Testa, notes that roughly 90% of these units belong to individuals, and that in some cases the decay is deliberate, obtained by removing the roof to qualify for the category.
The timing overlap is real; the causal claim deserves more caution. The year 2011 also opens the harshest phase of the sovereign debt crisis, the acceleration of depopulation in inland areas, and a cycle of inheritance fragmentation that multiplied co-ownership over low-value properties. Part of the growth is statistical emergence: buildings ruined for decades, registered only once the owner has reason to do so. The direction is not in question, the true intensity is probably lower than the headline figure implies.
Where recovery does not add up
The economics turn on the gap between restoration cost and end value. In inland municipalities and small Apennine towns, a restored dwelling often trades between 400 and 700 euros per square metre, while rebuilding a ruin with seismic and energy upgrading rarely costs less than 1,200. The differential is negative before permits, design fees and authorisation timelines enter the calculation.
In that setting abandonment is not neglect. It is the rational answer to a sum that does not close. Tax policy can speed the decision up or slow it down, but it operates on a margin already lost.
Ownership too fragmented to aggregate
The 90% held by individuals explains why village revitalisation schemes underperform expectations. The binding constraint is not the purchase price, often symbolic, but title structure: undivided shares among dispersed heirs, successions never accepted, cadastral records out of alignment. No institutional operator can assemble a lot large enough to justify the fixed costs of a regeneration scheme.
Valuing an asset with no income
In appraisal terms an F/2 unit is valued as land, net of demolition and remediation. Where the land is not developable or the volume cannot be recovered, value tends to zero and occasionally turns negative, since ownership carries safety obligations. The only instruments that bring the asset back into the market work on volume: recovery of existing cubic capacity, incentives under regional regeneration laws, transfer of development rights.
For local authorities this stock is both a management cost and a potential land bank. So far it has been treated almost exclusively as the former.
The F/2 curve measures the distance between reconstruction cost and end value across a growing share of the country. Tax policy can widen or narrow that distance without determining it. While the gap stays negative the count keeps rising, and it rises fastest where demography subtracts demand rather than adding it.