Soil study for an office unit in Serena del Mar: what to ask for before signing

Along this coast the ground is sand, fill and a high water table, and the foundation is the one part of a property you cannot see and cannot fix cheaply. The estudio de suelos —the geotechnical report— is the document that speaks to it, and what you should ask for depends on what you are buying.

A geotechnical engineer prepares the estudio de suelos with borings and laboratory testing, and it feeds the structural design filed with the licencia de construcción, the building permit. For an office unit that turns into different questions: asking for the report that will support work not yet built is not the same as asking for the one that supported a building put up years ago. The report states what the exploration found and what foundation the engineer recommended; it does not certify that the work was built to that recommendation, it does not replace the environmental permit where mangrove, a water setback or a ciénaga is involved, and it does not assert that the property is sound today. Where no report exists, what remains is rebuilding the file: approved drawings, the filed permit, and the history of repairs the owners' association has voted.

An office unit is bought differently because it does not live on passing footfall but on the building's ability to work as a business address. What makes it usable are services the unit does not control: the hours lifts and security actually run, the air conditioning and how it is metered, backup power, connectivity and visitor parking. None of that is fixed inside the unit and all of it runs through the administración, so the review looks at the building rather than at the door. The second difference is destinación, the recorded permitted use: in mixed-use towers, units whose registered use is residential are routinely sold as offices, and the mismatch between what the deed says, what the reglamento allows and what planning rules require is what later blocks registering the activity or receiving the public. The third is the rental market: an office tenant is a company choosing on address, floor area and building services, and is replaced by another of the same kind, so occupancy depends on the state of the whole tower far more than on the state of the unit.

Serena del Mar runs on rules of its own. The land is developed under a plan parcial, a master plan adopted by District decree, and that decree, not a general reading of the POT, the city land-use plan, is what sets uses, land transfers to the city and development obligations for a given lot. So the document to request here is the adopting decree with its drawings; the land-use certificate that serves in a settled neighborhood is not enough. The second difference is a layer of private government that exists nowhere else: the ciudadela, the master community, has its own statutes, an architectural committee and design rules governing façades, fences and renovations, and those rules follow the property on resale, binding a buyer who never negotiated them. The third is the counterparty: you usually deal with the developer or with a fiduciaria, a trust company, administering the stages, and the unit's registry record descends from a very large parent parcel subdivided in phases, so title is verified upward, to the matriz, the parent record, and to the deeds transferring land to the District. Infrastructure was built by the developer: what matters is whether it has been handed over to the utility or is still privately held.

What is specific to Serena del Mar

What to verify, step by step

1. Ask who signed the estudio de suelos and request the full report with its boring logs, not the cover sheet.
2. Confirm with the curaduría urbana —the private office that issues building permits— whether that report is in the permit file, and whether the approved drawings match what stands on site.
3. Ask Cardique whether the land is affected by mangrove, a water setback or a ciénaga, since that governs what can be founded there.
4. Review what belongs to office units and is not covered by the report alone: whether the deed's permitted use is office or residential, because in mixed-use towers residential units are routinely sold as offices; the hours the lifts, air conditioning and security actually operate, and whether use outside those hours is billed separately and whether the administración requires a declared destinación (recorded permitted use) and prior notice to receive the public, and which visitor parking is assigned to the unit.
5. Add what the ground in Serena del Mar imposes: which stage of the master plan the property sits in, because the development obligations and infrastructure timelines differ between them; which amenities are actually built and which are merely approved, a distinction the sales office does not always draw and how the master-community dues work alongside the individual complex's dues, which are two separate charges that add up.
6. If no report exists because the building is old, commission an engineer to assess its present condition and ask the District for whatever risk information it holds on the property.

Mistakes that cost money

• Accepting the neighbouring lot's report. Exploration is site-specific, and in coastal fill it changes from one property to the next.
• Reading the report as a certificate that the building was properly built. It records what the engineer recommended, not what the builder did.
• Buying with a visible crack and a verbal promise that the administración will repair it. What counts is the minute in which the owners voted the work and how it is paid for.

Frequently asked questions

Can the soil study for an office unit be sent to me by email?

Yes, it is a file and can be reviewed from abroad. The person who has to read it with judgement is an engineer, not the broker.

What if the seller says the report was lost?

Ask the curaduría for the permit file, where it was filed, and in parallel order an assessment of present condition.

Does the soil study cover beach erosion?

No. That is a separate question, put to the environmental and maritime authorities rather than to the geotechnical engineer.

Where to check it

• Curadurías Urbanas de Cartagena — whether a current building or subdivision permit exists and exactly what it authorises
• Cardique, autoridad ambiental del Canal del Dique — environmental permits, water setbacks and mangrove or wetland constraints
• Alcaldía Mayor de Cartagena de Indias — property tax, betterment levies and District procedures
• Cartagena de Indias — the rules of the municipality Serena del Mar belongs to

Official bodies. Specific figures are requested there, not copied from a listing.

Updated 2026-11-06