Are bathrooms considered “wet areas” under Australian standards? (Bathroom | Building & Approvals)

The answer is a definite yes. In fact, bathrooms are one of the most common examples of wet areas in a home, and this classification has important implications for design, construction, waterproofing, and renovations in Sydney and across Australia. Understanding what constitutes a wet area is critical for homeowners planning a bathroom upgrade, as compliance with Australian Standards ensures safety, durability, and long-term performance.

According to the Australian Standard AS 3740-2021, a “wet area” is any part of a building that is regularly exposed to moisture, water splashes, or high humidity. Bathrooms, showers, ensuites, and even laundry rooms often fall under this category. Because these spaces are subject to constant water exposure, they require special construction considerations, particularly around waterproofing, flooring, wall finishes, and junctions between surfaces. This prevents water damage, mould growth, and structural deterioration over time.

For bathroom renovations, this classification means that certain standards must be followed. Floors, walls, and penetrations around fixtures like sinks, showers, bathtubs, and toilets must be waterproofed according to AS 3740-2021. Wet areas also influence fixture selection, cabinetry, and tiling choices, as materials need to withstand frequent exposure to water and high humidity. Even electrical installations, like lights and fans, must comply with regulations for wet areas to ensure safety and reduce the risk of electrical hazards.

Designing a bathroom as a wet area also improves functionality and longevity. Proper waterproofing and material selection mean fewer repairs, less maintenance, and a cleaner, healthier environment—especially important in Sydney’s humid climate. Modern bathroom renovations often integrate wet area standards with stylish design solutions, such as frameless showers, floating vanities, and durable waterproof cabinetry, ensuring both aesthetics and compliance.

In short, bathrooms are definitely considered wet areas under Australian standards, and treating them as such is essential for safety, compliance, and durability. Homeowners planning a bathroom renovation should work with licensed professionals to ensure all wet area requirements are met, protecting their investment while creating a stylish, functional space.

Visit www.mb9.com.au to find out more information about kitchen, bathroom and laundry room renovation services from MB9 Australia Pty Ltd.