1. High rates of housing backlog;
2. It is difficult for people to get a house due to low incomes;
3. Insecurity in housing tenancy;
4. Shortage of spaces to build houses that may offer regular infrastructure and that may be near to employment sources;
5. Difficulties to provide the same access to services in rural areas, and in the fringes of the city;
6. Big differences between houses in indigenous communities, rural environments, and urban areas;
7. Low community standards in neighborhoods.
The program of United Nations for human settlements UN HABITAT (2011), mentions that there are seven elements to consider a housing service suitable: availability of services, materials, facilities and infrastructure; affordability; and habitability. In this topic, Congregación Mariana Trinitaria A.C. through this program, provides supports and solutions to build, enlarge or improve houses; and to allow access to basic services and technologies that contribute to environmental protection.