HUNTLEY – A $12 million expansion of Huntley High School likely will begin this summer with renovation of athletic fields, including a built-in irrigation system and new, synthetic turf for football.

The expansion to address crowded classrooms, hallways and common areas will not include some big-ticket items, such as a new swimming pool and field house.

District 158 officials also have ruled out building a second high school, saying that a price tag of at least $60 million would be too costly for a student population that has stopped growing at the feverish pace administrators projected a decade ago.