Possibly the best property developer I ever worked for in Spain was Siegfried Borho, Chairman Construcciones Hispano Germanas, who possibly designed or built this property. He started developing in Denia and then developed Oliva Nova Beach & Golf Resort. He had a number of other properties, including some in Pego.
His attention to detail and care for his clients was exemplary. A true German with very high personal standards. Not one serious complaint in all his time developing property in Spain.
I am sure that if you Google CHG in Denia you will be able to reach him. I have lost touch with him since leaving Spain.