[4] Seseña gained visibility as a result of controversial speculative development projects in Vallegrande and El Quiñón during the Spanish property bubble.

Begun during the construction boom of the 2000s (decade), due to the municipality's location within commuting distance of Madrid, it was to be one of the largest such developments in Spain, with an original plan of 13,500 units costing over 9 billion euros to build.

Also the project had been approved unusually quickly: it turned out that the authorities had been bribed, and the former local Mayor José Luis Martín was soon arrested, but never brought to trial.

[11][12][13] The developer, Francisco Hernando Contreras aka El Pocero, was never criminally charged with wrongdoing and moved his business to Equatorial Guinea.

[14] In the context of the boom of logistics experienced in La Sagra (and the spread of the mobile home phenomena in nearby locations such as Carranque, Yeles, Numancia, Illescas, and Yuncos), most of the dwellings in the Residencial Francisco Hernando were inhabited by the early 2020s, and the municipal government thereby unblocked a plan for the construction of more buildings,[15] with the municipality laying out a project in 2022 seeking to build "up until 13,825 dwellings", even more than those 'El Pocero' dreamed of.