His work is recognized worldwide as an original and interesting union of constructivist, rationalist and organic architecture.
His understanding of architecture came from popular contemporary approaches, and his spectacular but simple structural solutions, such as vaults, have been influential.
Higueras's significant works include: the Spanish Pavilion located in New York City (1963), a multi-purpose building for Montecarlo (1969), the La Macarrona Residence in Somosaguas, Madrid (1971-1976), the Fierro House in Marbella (1971), the Castellana at number 266 Paseo de la Castellana in Madrid and the headquarters of the Spanish Cultural Heritage Institute (Spanish: Instituto del Patrimonio Cultural de España).
He also designed the Museo de Antonio López Torres, in Tomelloso, Ciudad Real.
Higueras was the winner of several architectural competitions, including the Montecarlo Polivalet Building (1969) and the Ministry of Foreign Affairs in Abu Dhabi (1980).