What defines a greenfield site?

A greenfield site is defined as a plot of land that has not yet been developed, often found in rural areas. This type of land is typically untouched by urban development, meaning it has no existing structures or infrastructure. The significance of greenfield sites lies in their potential for new development projects, which can include residential or commercial buildings, parks, and other facilities.

In terms of urban planning and development, greenfield sites are often sought after for their capacity to accommodate expansion without the complexities posed by existing developments. They usually present opportunities for sustainable development practices, as they can be designed from the ground up to meet contemporary environmental and social standards.

The other options describe different contexts of land use. A previously developed urban area refers to brownfield sites, which are often viewed as needing redevelopment rather than building from scratch. A plot of land that has been subject to building development contradicts the definition of a greenfield since it implies existing structures. A commercial zone refers to an area specifically designated for business activities, which does not align with the concept of a greenfield site focused on undeveloped land.