Flood-risk checks before buying on Costa Blanca South

1. Locate the actual property, not just the town

Ask for the exact address and available property identification, then match the building and plot to the map. A development name or an approximate advertising pin is not enough. Save a dated note of the location you checked and any uncertainty over boundaries.

MITECO’s SNCZI page provides the national flood-mapping entry point. Open the viewer from that official page, choose the relevant layers and read their legends and coverage information. Keep the layer names and dates with your notes so a professional can reproduce the check.

2. Read scenarios without treating them as a timetable

MITECO describes river-flood probability scenarios using 10-, 100- and 500-year return periods. These are probability scenarios, not dates predicting the next flood. Do not interpret a 100-year label as a promise of 99 dry years.

MITECO also cautions that mapping does not cover every flood-prone area. No colour at a location does not establish zero risk. Ask a competent technician about missing coverage and any further investigation needed, rather than filling the information gap with an assumption.

3. Compare the regional PATRICOVA information

The Generalitat Valenciana’s PATRICOVA flood-hazard dataset includes six numbered hazard levels and a separate geomorphological category. Read its own legend; do not assume its colours mean the same thing as those in another viewer.

The ICV also publishes PATRICOVA floodability studies for particular geographical areas. Ask your adviser and the relevant municipal planning service whether a study applies to the plot and what its findings mean for your intended use. A screenshot alone is not a planning opinion.

4. Inspect the building and ask about its history

Make a separate checklist for the home, any garage or basement, storage rooms and shared facilities. Ask where rainwater is intended to drain, who maintains the system and whether there have been water-entry incidents or repairs. Request available records rather than relying only on verbal reassurance.

For an apartment in Torrevieja or Orihuela Costa, include communal garage ramps, lifts and equipment rooms in the questions to the administrator. For a villa or townhouse in San Miguel de Salinas, include the plot entrance, terraces and any below-ground space. These are viewing prompts, not claims that one property type or municipality is more exposed.

Photograph concerning marks with permission and ask an independent building professional to interpret them. Fresh paint, a dry viewing day or an upper-floor location cannot answer every question about the building and its shared services.

5. Resolve practical and professional questions before reserving

Give your independent legal adviser the map notes and technical findings. Ask what further checks are appropriate before signing a reservation or purchase agreement. For new builds, request the applicable project and drainage information; for resales, request available repair and maintenance records.

Discuss the exact address, use and building features with an insurer. Ask in writing about the proposed cover, exclusions, excesses and any conditions relevant to water damage. This guide does not establish insurability or promise that a particular event would be covered.

Consider access separately: which entrance, garage route and approach would you use? Do not visit an affected location to test flood behaviour. Property due diligence is not a substitute for following emergency instructions.

6. Keep one evidence sheet for each shortlisted home

Record the address, map layers checked, unanswered questions, requested documents, professional conclusions and actions still required. Distinguish the seller’s statements from verified records and your own observations. Compare homes using the same checklist.

Verdi Estate can help request available information and coordinate access for the professionals you appoint. Tell us whether you plan year-round living or seasonal stays and whether parking or storage is essential. We can use those priorities in the search; independent specialists should assess the property-specific risks.