In urban terms, lot, buildable lot or empty, vacant or open plot is a piece of land that meets minimum conditions to be built on and on which its use can subsequently be adequately developed. These conditions fundamentally refer to the provision of water and electricity, the evacuation or purification of wastewater, and road access.

In the northeast of Mexico, the use of the term solar or cerco has been documented to refer to the area delimited by a fence in which the different uses of a home are located; That is, to refer to the delimitation of a piece of land regardless of the conditions of water, electricity and gas services.[1]​.

Contenido

Las características concretas que debe reunir un terreno para ser considerado “solar” se establecen por cada comunidad autónoma sobre la base de estos criterios.

Castile and León

"Urban land surfaces") legally formed[2]​ or divided, suitable for immediate use in accordance with the determinations of current urban planning, and that have access by urban road and services.

Access by urban road that meets the following conditions: open on land of public use and domain, indicated as a public road in some urban planning instrument; passable by motor vehicles, except in historic centers delimited by urban planning, and without prejudice to traffic regulation measures; paved and urbanized in accordance with the alignments, grades and technical standards") established in the urban planning.

The services, available at the foot of the plot in conditions of flow, power, intensity and accessibility appropriate to serve the existing constructions and facilities and those provided for or permitted by urban planning, are the following: supply of drinking water through municipal distribution network, sanitation through municipal wastewater evacuation network, supply of electrical energy through low voltage network, public lighting and telecommunications.

Land classified as unconsolidated urban land") and as developable land") can only reach the condition of a site once the necessary urbanization works have been executed to the sector with the general systems") of public roads and urban services and, failing that, with the existing public roads and urban services, or, where appropriate, said systems, when said expansion or reinforcement is necessary to ensure the correct functioning of said elements.