Fourth Period (1930-1960):

Neighborhoods:

• The Villa Juana emerges during this time, an expansion of Independencia.

• The Zone of Gazcue, an assembly of large and small expansions, is boardered to the East by Lugo and Dr. Delgado, to the West by Máximo Gómez, to the South by the Caribbean sea, and to the North by the old General Andrew Airport. Bolívar Avenue is the main street of the sector. During the trujillista era, the Law of Urbanization, Public Adornment, and Construction required the organization of old streets and blocks. Likewise, the city's first condominiums or apartment buildings were installed here, though they were not under zoning law until 1958.

• Social Improvement Neighborhood. The first housing project of a social character developed by the Dominican State. Inaugurated in 1940. Dwellings were cost-effective: stone masonry walls 30 cm thick, partitions of hollow brick, reinforced concrete ceiling, and cement floors. 65 square meters were often distributed between a living room, two bedrooms, a dining room, a kitchen, and a bathroom with shower and toilet. Other apartments were smaller (45 square meters).