Vanity Unit Buying Guide: Sizes, Basins and Storage

A vanity unit is the hardest-working piece of furniture in any bathroom: it hides pipework and clutter, gives you a surface to get ready on and sets the tone for the whole room. This guide is for anyone planning a new bathroom or refreshing a tired one, and by the end you will know how to size a vanity, pick the right basin, choose between drawers and doors, and avoid the plumbing pitfalls that catch most first-time buyers.

1. What a vanity unit does

A vanity unit combines a basin with an enclosed cabinet, so a single piece delivers three jobs at once: somewhere to wash, somewhere to store and a way to conceal the untidy tangle of pipes and traps beneath the sink. Compared with a pedestal basin, which leaves everything on show, a vanity turns dead space around the waste pipe into usable cupboard room. That makes it the most practical choice for family bathrooms, en-suites and cloakrooms alike.

Before you shop, be honest about what you need the unit to do. A busy family bathroom benefits from deep drawers for towels and spare toiletries, while a downstairs cloakroom may only have room for a slimline cabinet with a small basin. Getting this brief right first saves you from falling for a unit that looks lovely but does not fit your day-to-day routine. If storage is your priority across the whole room, it is worth reading our companion bathroom cabinet guide alongside this one.

2. Sizes and how to measure

Vanity units are sold by width, and UK ranges cluster around a handful of standard sizes. Choosing the right one is a balance between the storage you want and the floor space you can spare, remembering to leave clearance for the door to open and for someone to stand comfortably in front of the basin.

Standard vanity height is around 80–85 cm to the top of the basin, which suits most adults. Wall-hung units let you set your own height, so raise them a little if the household is tall or drop them for a child’s bathroom. Always measure the width of the wall, the depth from the wall into the room, and the swing of any nearby door before you buy.