How to Say "urban development" in Spanish
The Spanish word for “urban development” is “urbanización” — B2 level.
English → SpanishB2
nounB2formal
the physical growth of urban areas

Examples
La rápida urbanización del siglo veinte cambió el país.
The rapid urbanization of the twentieth century changed the country.
El plan de urbanización busca mejorar las carreteras.
The urban development plan aims to improve the roads.
Debemos controlar la urbanización para proteger el bosque.
We must control urban development to protect the forest.
Abstract vs. Concrete
In this sense, the word describes an abstract process (development) rather than a physical place where you can stand.
Related Translations
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