Before buying, the right question is not “will this building survive an earthquake?” That conclusion belongs to engineering. Buyer due diligence should establish what was designed, under which code, on what soil, what was built and what has changed or been reported since.
Which documents should you request?
- Construction license(s) and relevant amendments.
- Available structural drawings and design records.
- Project geotechnical/soil report.
- Applicable technical-supervision and design/construction responsibility records.
- Later structural alterations or changes of use.
- Building reports/minutes about earthquakes, settlement, cracks or interventions.
- Any vulnerability assessment or strengthening study.
Do Medellín and Cartagena have the same seismic hazard?
No. NSR-10 assigns territorial seismic parameters and local soil conditions also matter. Medellín appears at higher hazard parameters than Cartagena in national tables, while Cartagena planning documents still recognize earthquake scenarios and local susceptibility such as liquefaction in certain ground conditions.
Why does the soil report matter?
Building response depends partly on the motion reaching its foundation and on ground conditions. A geotechnical report is not decorative paperwork: it addresses stratigraphy, bearing conditions, groundwater and design parameters. In coastal or fill areas, liquefaction/settlement questions can be especially relevant.
Which private alterations deserve scrutiny?
- Walls removed without clear documentation.
- New openings or slab/structural changes.
- Jacuzzis, pools or heavy equipment added without load review.
- Combined apartments or aggressive layout changes.
- Damage cosmetically repaired without a known diagnosis.
What can you observe during a viewing?
A viewing cannot certify structure, but it can create questions: recurring cracks across multiple floors, changed door operation, slopes, corrosion/reinforcement exposure, visible interventions or repeated localized repairs. The objective is to decide what an engineer should investigate and which records are missing.
What did the August 10, 2026 earthquake teach buyers?
A M7.4 event was felt widely across Colombia and activated inspection protocols. Medellín received hundreds of calls about possible partial effects, while Cartagena’s initial monitoring reported no structural effects. The investment lesson is not “city A safe/city B unsafe”; it is that an owner should know where records are, who coordinates inspections and how occupancy decisions are made after an event.
What would TALOA ask a seller or administrator?
- Which code and license support construction?
- Where is the soil report kept?
- Have structural interventions or strengthening occurred?
- What did the building report after recent earthquakes?
- Who is responsible for engineering review when damage appears?
- Which critical non-structural elements—façades, ceilings, tanks, equipment—have maintenance plans?
Frequently asked questions
Is a building constructed under NSR-10 automatically safe?
No automatic guarantee exists. The code sets minimum requirements, while execution, soil, alterations, maintenance and current condition also matter.
Is an older building automatically dangerous?
No. Age is a prompt to investigate code, design, alterations, assessments and strengthening; it cannot decide safety alone.
Does Cartagena have no seismic risk?
Incorrect. Its code hazard parameters are lower than some Colombian cities, but risk is not zero and local soil conditions also matter.
Can I assess the structure during a viewing?
A viewing can identify questions and missing documentation but does not replace structural-engineering evaluation.
Which technical record is often overlooked?
The geotechnical/soil report is important because ground conditions are part of foundation and seismic behavior.
Primary sources and references
Consulted for this edition. Confirm the current version before a legal, technical or investment decision.