Three flood-risk areas: how to read the map

Spain's flood-zone mapping system (SNCZI) finds 3 ARPSI, areas of potentially significant flood risk, in the municipality (codes ES091_ARPS_BGL, ES091_ARPS_HRV and ES091_ARPS_MEB), with mapped flood zones from the 10-year return period. The Ebro, the Gállego and the Huerva all cross Zaragoza, whose municipal area is very large.

The Ebro basin authority grades each of these areas by stretch, scoring flooded surface, depth and speed of the water, response time, sediment and obstacles. That is a tool for managing risk, not a verdict on a building: to know about one flat, open the SNCZI viewer, switch on the 10, 100 and 500-year layers and find the entrance. Near a riverbank, ask the owners' association whether water has ever reached the garage, and get an insurance quote before paying the deposit.

A mixed housing stock

The 2021 Census counts 338,961 homes in Zaragoza. The largest decade is 1961 to 1970, with 70,550, followed by 1971 to 1980 with 64,791, but each decade from 1981 to 2010 still adds between 43,180 and 45,464 homes. Buyers therefore find as many flats from the 1980s to 2000s as from the 1960s and 1970s.

For a flat from 1950 to 1970, ask about the floor joists: those were the years of high-alumina cement, whose deterioration Spaniards call aluminosis. For later buildings, maintenance, installations and the energy certificate usually matter more.

The building inspection in Zaragoza

In Zaragoza the building inspection (ITE or IEE) is governed by a municipal ordinance approved on 27 September 2002. Owners must carry out the first inspection within the year after the building turns 50 and repeat it every 10 years. It covers foundations, structure, facades facing public spaces, roofs and main installations, and the results go into the City Council's municipal inspection register.

The rollout began with pre-1940 buildings in the San Pablo and La Magdalena areas, due by 31 December 2005, then moved on by age until, from 2010, every building reaching 50 joined the timetable. Owners who fail to comply face recurring fines of €600, up to three times. For you as a buyer, what matters is whether the last inspection left repairs pending: the owners' association, and you with it, will pay for them.

Earthquakes, radon, prices and what the report checks

Zaragoza is not listed in the NCSE-02 seismic code (below 0.04 g) nor in radon zones I or II of the Building Code. The average appraised value of private housing was €2,216/m² in the first quarter of 2026, up 14.8% year on year, and the 2025 crime statistics record 43 known offences per 1,000 residents against a national average of 50.4.

HOUSINGFAX runs all 22 checks with national sources, including the SNCZI flood maps at the building's location. The municipal inspection register is not one of its sources, so ask the seller for the inspection. Start with the free report; the essential costs €11 and the complete one €19. The report does not replace an on-site technical inspection of the building.

What the report checks in Zaragoza

The report runs all 22 checks for any address in Zaragoza, each with its national sources.

Check my home for freeSee the 22 checksSee the sample report

Short answers

Which parts of Zaragoza are in a flood zone?

The SNCZI marks 3 areas of potentially significant flood risk and flood zones along the Ebro and its tributaries. For a specific address, use the SNCZI viewer or the report.

Is a building inspection compulsory in Zaragoza?

Yes. The first inspection is due within the year after a building turns 50, and then every 10 years.

Where is a Zaragoza building inspection recorded?

In the municipal register of technical building inspections kept by the City Council's planning department. In practice, ask the seller or property manager for a copy.

Does Zaragoza have earthquake or radon risk?

Not according to national rules: it is below 0.04 g in the NCSE-02 and outside radon zones I and II. The report checks both at the building's location.

Official sources you can consult

The links let you review the primary source. Their inclusion does not widen their purpose or turn a piece of context into a diagnosis.

Essential limit. Preliminary screening: it does not replace an inspection, a diagnosis, a test, a certificate or a safety report.