A floor waste (aka a floor drain) is a small outlet in the floor that helps water drain away, whether it's from a leaking washing machine, an overflowing tub, or that time someone forgot the laundry tap was running...
It’s basically your last line of defence when water ends up where it shouldn’t be.

If you’re building or renovating in Australia or New Zealand, then yes, in most cases, a floor waste is required in the laundry.

According to the National Construction Code (NCC) and AS/NZS 3500 plumbing standards, a floor waste must be installed in laundries unless certain conditions are met, like if the washing machine is in a separate, fully contained area with proper drainage and water containment.

But to keep it simple: If your laundry is in a standard room setup, you’ll almost always need a floor waste.

When it comes to laundries, floor wastes are often required:

Standard laundry: Yes, unless water is fully contained and managed.

Combined bathroom/laundry: Yes, at least one in the shared space.

Enclosed laundry cupboard: Sometimes, may be exempt with a drain tray and water stop.

Garage laundry: Usually, especially if on a concrete slab with no water containment.

Still unsure? It’s best to double-check with your plumber or builder, they'll know what applies to your type of build.

Even if you could get away without one, here’s why we reckon you should include one anyway:

Leaky washing machines happen, and it’s never at a good time
Peace of mind, knowing your floor can handle unexpected spills
Insurance and compliance, some policies and local councils expect one
Easy cleanups, great if your laundry doubles as a mudroom or utility space

If your washing machine is installed in:

A completely sealed cupboard with a water stop and a drain tray
An apartment or unit where the laundry sits above a floor waste in the bathroom
A custom space that meets specific water containment requirements...then your setup might be exempt, but don’t assume. Always check with your certifier or plumber.