Remodelling a small bathroom in Sydney typically costs between $2,000 and $30,000, depending on the scope of work, material quality, and labour involved. Tiling, plumbing, electrical upgrades, and material choices significantly impact the budget, with labour often accounting for the largest expense. To save on costs, consider retaining existing layouts, opting for cost-effective materials, and tackling DIY tasks like demolition. A well-planned remodel can enhance both comfort and property value.