What a building's age tells you in Spain

A building's age is not a neutral fact. It does not mean that the property is good or bad—some buildings from the 1960s are better maintained than others built in 2005—but it does place it in a specific technical context: the regulations in force when it was built, the systems it is likely to contain, and how much will need checking before or after purchase.

The true state of Spain's housing stock

Spain's housing stock is old—not anecdotally, but structurally. According to the INE Population and Housing Census, 41.38% of homes in Spain are between 30 and 49 years old, 29.6% are between 50 and 69 years old, and 29.9% are over 70 years old. In other words, nearly 60% of the housing stock is now more than 50 years old. Most existing homes were built between 1960 and the 2000s, with 1971–1980 and 2001–2010 the most prolific periods. According to the Federación Nacional de Asociaciones Inmobiliarias, the average age of Spain's resale housing stock is 43.5 years.

When you buy a resale property—which accounts for most of the Spanish market—you are generally buying something built more than four decades ago.

What each construction era means

Not all older properties are alike. There are four major periods in Spanish construction history that matter when assessing what you are buying:

• Before 1960—traditional construction. Load-bearing brick or stone walls, often with timber floor structures, and electrical and plumbing systems that may be 70 years old or more. The upside: quality materials and thick walls that provide some natural thermal performance. The downside: virtually everything inside may need inspection or replacement. Electrical systems from this period were not designed for modern loads and can pose a risk. Lead or galvanised-iron plumbing, still found in some buildings of this age, no longer meets current standards.
• 1960–1980—the development boom. This was the period when Spain built the most housing and, in technical quality terms, it was not the best. Construction was rushed, materials were cheap, and supervision was limited. The most common problems in buildings from this era are little or no insulation, rising damp on ground floors, plumbing systems beginning to fail, and façade cracking caused by structural movement.
• 1980–2006—gradual improvement, but before the CTE. Building standards improved, materials became more reliable, and technical supervision increased. However, these buildings predate the Código Técnico de la Edificación, or Spanish Technical Building Code (CTE), approved in 2006, which introduced the first robust requirements for energy efficiency, sound insulation, and accessibility. A building from 1998 may be in perfect condition but still have insulation that would now be considered clearly inadequate.
• 2006 onwards—the CTE era. Approval of the Código Técnico de la Edificación in 2006 marked a significant improvement in the minimum standards required for new construction: thermal insulation, noise protection, universal accessibility, and energy efficiency. By definition, a building constructed under the CTE has guaranteed minimum standards that earlier buildings do not.

What a building's age automatically triggers

There are two direct consequences of age that you should understand before buying:

The first is the mandatory technical building inspection (ITE/IEE). As we explain in another article, these inspections are triggered by the building's age. If the building you are considering is more than 30 or 50 years old, depending on the municipality, asking for proof that its inspection is up to date is a basic and entirely reasonable request.

The second is the service life of its systems. Electrical installations have an indicative service life of 20–30 years; plumbing, 30–50 years; and communal heating systems, 20–25 years. A building from 1975 that has not been refurbished is likely to have all these systems at or beyond their limits. A building from 1985 that has undergone a comprehensive refurbishment may be technically up to date. Age is the starting point for asking the right questions, not the answer.

What Hogarfax does

We calculate a property's age from the year of construction recorded in cadastral data and present it with the relevant context.

A note on the source: the year of construction recorded by the Cadastre is the best consistently available figure for the whole of Spain, but it is not always exact. Following major refurbishment works, the Cadastre may show the original construction date rather than the refurbishment date; in other cases, records may contain errors. We present it as an indicative figure, not as a technical certificate.

Age does not disqualify a property. It does, however, determine the level of due diligence you need before buying it.