How to Check (and Challenge) a Property's Estrato Before You Buy

Every residential property in Medellín carries a number from 1 to 6, and that number follows the apartment through every sale. It affects the utility bills you'll pay as long as you own the place, it shapes how buyers and renters see the building, and it can be wrong. Our estrato explainer covers what the system means. This guide is the practical companion: how to confirm a property's estrato before you sign, what to do when the sources disagree, and how the formal review process works.

What the estrato actually attaches to

Start with the most common misunderstanding. The estrato classifies properties, not people. Colombia's national statistics agency, DANE, points to Ley 142 de 1994, which tells municipalities to stratify residential properties rather than households. Your income, nationality and lifestyle play no part. The classification depends on the dwelling and its surroundings, using methods set by the national government.

The six levels have official names:

Who assigns it? The municipal or district government. DANE describes stratification as a duty the mayor can't delegate. In Medellín, that means the Alcaldía, not the utility company, the building or the seller.

Why buyers should verify it rather than trust the listing

The estrato is mainly a tariff tool. Its job is to decide who gets subsidies and who pays contributions on residential public utilities. For an owner, that has a few practical consequences:

• Running costs. The same water, power and gas use costs more at estrato 5 or 6 than at estrato 4, and more at 4 than at the subsidized levels. Our utilities, EPM and estrato guide explains how the bills are built.
• Rental and resale positioning. Local renters and buyers use estrato as shorthand when they search. A listing that claims a higher or lower estrato than the property actually has misleads everyone downstream, including you when you sell.
• Comparing like with like. When you compare two apartments, a difference in estrato is a real difference in monthly costs, not just a label.

Where to find a property's estrato

Use more than one source, and treat the listing as the weakest.

When the sources don't match

Mismatches happen. The two that matter most for a buyer are these:

The bill shows a different estrato from the Alcaldía's record

According to DANE, if a utility bills you under a different estrato from the one the Alcaldía adopted, the claim goes first to the utility company. If the company doesn't answer, or you disagree with its answer, you can take it to the Superintendencia de Servicios Públicos Domiciliarios. For a buyer, the key point is to know which number is official before you rely on either one in your budget.

You think the Alcaldía's estrato itself is wrong

That's a different process, a review of the stratification itself (covered in the next section). It isn't something to count on when you price a purchase. Buy based on the estrato the property has, not the one you hope it will get.

How to request a review of an estrato

Once you own the property, you can ask for a review if you believe the estrato is wrong. DANE describes a two-step route:

1. File a claim with the AlcaldíaAny person can file a reclamación with the municipal or district government. DANE says the Alcaldía must resolve it within two months at most.
2. Appeal to the Comité Permanente de EstratificaciónIf you disagree with the Alcaldía's decision, you can appeal to the local permanent stratification committee, which also has two months to decide.
3. Follow up with the utilityIf the official estrato changes, check that your utility bills change to match. A bill that doesn't follow the official estrato is a matter for the company first, then the Superintendencia.

Keep copies of everything you file and the responses. If you're abroad, your lawyer or property manager can handle the filing for you, with the authority you've given them in writing.

Estrato when you plan to rent the property out

If you'll lease the apartment while you're away, the estrato matters twice: once in your own budget and once in your tenant's.

On a traditional unfurnished lease, tenants usually pay utilities directly, so they'll look at the estrato to estimate their total monthly cost. The rental market itself is organized partly around it. The regulation for Colombia's urban housing lease law (Decreto 51 de 2004) even has registered rental agencies report average rents by estratificación and location to the authorities. A misstated estrato in your listing will surface on the first bill, and a tenant who feels misled is a bad start to a lease.

On furnished stays where you pay the utilities and fold them into the rent, the estrato goes straight into your margin. Before you set a price, estimate utilities at the official estrato for realistic occupancy, not for an empty apartment.

• State the estrato in your listing exactly as it appears on the bills.
• Tell your property manager which utilities the tenant pays and which you pay, and put it in the lease.
• If you're reviewing the estrato, don't advertise the expected result until the decision is final.

For management arrangements, see hiring a property manager from abroad.

What the estrato doesn't tell you

Estrato is a blunt tool, and foreign buyers sometimes read too much into it. It doesn't measure:

• Safety. Walk the area at night and talk to residents. Don't use the estrato as a stand-in.
• Building quality or management. A poorly run estrato-6 building can be a worse buy than a well-run estrato-4 one. Read the assembly minutes; our propiedad horizontal guide explains what to look for.
• Structural or slope risk. That's a separate check; see hillside property due diligence.
• Future value. No one can tell you from the estrato whether a property will appreciate.
• Who your neighbors are. Mixed-estrato streets are common, and the boundary between two estratos can run between neighboring blocks.

Your pre-offer estrato checklist

Add these items to the due diligence list you agree with your lawyer (our buying process page shows where they fit):

• Estrato as stated in the listing, noted for comparison
• Several months of utility bills for water, power and gas, showing the estrato billed
• Written confirmation of the estrato in the Alcaldía's record, obtained by your lawyer
• Any mismatch explained with documents, not verbal assurances
• Utility accounts current, with no arrears or disconnection notices
• Your monthly cost estimate built on the official estrato, not the hoped-for one
• Bills compared with similar units in the same building, through the administración or neighbors
• Estrato considered alongside the predial bill and the administración fee, not on its own

Our guide to predial and administración covers the other two recurring bills. Our total cost of ownership guide brings everything together.

Frequently asked questions

This article is general information for property buyers. It is not legal or tax advice. Procedures and deadlines can change, so confirm the current process with the Alcaldía de Medellín and an independent Colombian lawyer before you rely on it.