What is an estrato? It is important to understand estratos when looking at real estate in Colombia. We provide a guide to estratos in Colombia. Estratos are a classification in strata of residential properties that must receive public utilities. It is carried out mainly to charge for residential public utilities in a differential manner by strata, allowing subsidies to be assigned and contributions to be collected in this area. In this way, those who have more economic capacity pay more for public services and contribute so that the lower strata can pay their bills.