1800mm Plywood Vanities for Double-Basin Bathrooms

A wide double-basin vanity built from marine-grade plywood trades the usual board carcass for something that stands up better to a wet room. At 1800mm it gives two people their own basin, and the plywood construction is the reason to pay attention. Here's what sets it apart.

Why plywood over standard board

Most vanities use MDF or particleboard, which perform fine when sealed but rely on that seal staying intact. Marine-grade plywood is built from thin timber veneers glued in alternating layers with water-resistant adhesive, so it holds screws better and copes with damp far more gracefully if a seal ever fails. In a hard-working double-basin bathroom that resilience is worth having. Check the edge banding and the grade stamp so you know it’s genuine marine ply, not a lookalike.

Making the most of 1800mm

An 1800mm cabinet is wide enough for two proper basins with bench between them, rather than two bowls jammed together. Plan the storage around the two waste pipes: centre drawers stay clear of the plumbing, while the outer ends can take cupboards for bulkier items. A coloured finish over the ply keeps the unit looking crisp while the structure underneath does the real work.

Installation notes

A wide, sturdy plywood cabinet is heavier than a hollow board equivalent, so a floor-standing setup on a solid kickboard makes sense and keeps installation straightforward. Two basins mean two sets of tapware and drainage, so confirm the rough-in spacing matches the cabinet before the plumber commits.

Compare construction in person

Renovating in the Illawarra region? Build quality is easier to judge by hand — you can explore a range of bathroom vanities at Just Bathrooms, a local showroom, to compare cabinet materials.