Contact Beaches External Pressure Cleaning Hillsdale today. To give your home or business the positive looks it deserves. A clean and fresh exterior for your Hillsdale 2036 home or business. Offer a welcoming and positive fresh look. Hillsdale is a suburb in the Eastern Suburbs of Sydney, in the state of New South Wales, Australia. Hillsdale located 6 kilometres south-east of the Sydney central business district. In the Bayside Council. The suburb’s named after Pat Hills, former Deputy Premier of New South Wales.