Baulkham Hills Preschool Kindergarten Inc. Location: 5 Torrs Street, Baulkham Hills NSW 2153 Postal Address: PO Box 8, Baulkham Hills NSW 1755 Phone: (02) 9639 5091 Email: bhillspreschool@bigpond.com Website: baulkhamhillspreschool.nsw.edu.au Baulkham Hills Preschool Kindergarten operates Monday-Friday (8.00am-4.00pm) in NSW School terms. Please note: Our operational hours from 2021 are 8.15am – 3.45pm.