Walnut double vanity with Calacatta marble top and twin backlit mirrors

Double vanities

Double sink vanity planning: width, spacing and storage

A double sink vanity gives two people their own basin, faucet and mirror at the same time. It needs enough width to keep elbows apart and enough storage that the shared counter stays clear.

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Illustrative interior

01Two people, one wall

When a double sink vanity makes sense

If two people get ready at the same time, a double sink vanity removes the queue. If one sleeps later, a single larger basin with more counter may serve you better — the second basin takes up counter space and storage below it for plumbing.

Width is the deciding number (every standard width is compared in bathroom vanity sizes). At 60 in (1,525 mm) two basins fit but the counter between them is small. At 72 in (1,830 mm) each person gets a real working area. At 84 in and above you can add a drawer tower or a makeup station between the sinks.

Many double vanities are floating, which keeps a long cabinet from feeling heavy. The finishes and basin options are the same as across our bathroom vanities; for a pared-back look, see modern vanities. Book a consultation with your wall width and plumbing positions, or match the vanity to a kitchen designed in our configurator.

02Spacing

Double vanity dimensions

Overall width: 60 in minimum, 72 in comfortable, 84–96 in generous
Between sink centers: 30 in minimum (a common code requirement); 32–36 in is more comfortable
Sink center to side wall: At least 15 in; 18–20 in leaves room for a towel and soap
Depth: 21–22 in, so the counter between basins is usable
Plumbing: Two drains and two pairs of supplies, each placed at its basin center
Lighting: Two separate light zones, or one long backlit mirror with even light

03Layout options

Three ways to arrange a double vanity

One long top
A single stone top and continuous cabinet: the calmest look and the easiest to clean.
Center tower
A drawer stack or tall cabinet between basins gives each person private storage.
Two separate vanities
Two units on opposite or adjacent walls, sometimes at different heights for different users.

04Storage

Storage between and below two basins

Two sets of plumbing take space, so storage is planned around the traps rather than in spite of them.

U-shaped drawers at each basin
Top drawers wrap around each trap, so both sides keep almost their full width for daily items.
Full drawers in the middle
The zone between the basins is free of plumbing, which makes it the place for the deepest drawers.
One drawer each
Giving each person their own top drawer keeps the shared counter clear without negotiation.
Outlets inside
An outlet in a drawer or the center tower lets hair dryers and toothbrushes charge out of sight; plan it with your electrician.

Bathroom with book-matched Calacatta marble walls and a walk-in shower — Illustrative interior

05Mirrors & light

Two mirrors or one

Two mirrors centered on the basins frame each station and look tidy on a 72 in vanity. One long mirror, wall to wall, makes a narrow bathroom feel wider and bounces more light.

Light at face height on both sides of each mirror, or a backlit mirror, avoids the shadows a single overhead fixture throws. Pair it with brushed brass or black fixtures in one finish across both basins.

FAQ

Questions, answered

Still deciding? Call +1 (213) 776-0000 or send us your plan.

Ask a designer

What is the smallest double sink vanity?

Around 60 in wide. Below that, the basins sit too close for two people to use at once and the counter space between them disappears. A 48 in vanity with one wide basin is often better.

Can each side of a double vanity be at a different height?

Yes, with two separate floating units. If one person is much taller, setting their side 2–4 in higher makes a noticeable difference to comfort.

Do I need two drains for a double vanity?

Usually each basin gets its own drain and supplies. Your plumber confirms the arrangement allowed under the California Plumbing Code for your bathroom.