Choosing between a double or single sink in a bathroom can often define the entire layout of your design.
Single basins have been seen in bathroom designs up and down the country for years, but installing a double inset sink or twin basins side-by-side is increasingly becoming a firm favourite in family bathrooms or luxurious ensuites where space allows.
But how should you decide whether or not to choose a single or a double sink? And which type of bathroom sink are right for these two different designs? Take a look at the pros, cons and budget considerations below.
Is it better to have a double or single sink?
Whether it is better to have a double or a single sink depends on budget, style preference and, of course, the space available.
“Double basins are becoming increasingly popular in ensuites and family bathrooms as they enhance functionality and allow multiple people to use the space at the same time,” comments Jorge Hernandez, head of product design at Burlington Bathrooms. “In family bathrooms, having two basins can help to prevent delays during busy mornings, particularly in larger households.
"For couples, a double basin in an ensuite adds a touch of luxury, offering both functionality and elegance. A double basin allows each person their own space to get ready, reducing the need to share counter space or rush through the morning routine, and transforming the bathroom into more of a personal retreat.”
Jorge Hernandez
Jorge graduated from Bournemouth University's School of Design before leading design team in the bathroom industry, devising new and innovative products.
How much space is needed for double and single sinks?
“A single basin typically requires a minimum width of around 60-80cm for comfortable use, while a double basin usually requires at least 120cm,” Shamila Iqbal, director at Bathroom Mountain. “However, to create an optimal user experience with sufficient counter space and elbow room, a width of 150-180cm is recommended for a double basin setup. This additional space helps to ensure that there is enough room for plumbing, practical countertop storage, and to prevent overcrowding when two people are using the basins simultaneously. The depth required is generally similar for both single and double basins, around 45-50cm.”
“For single vanities, aim for at least 76 to 91cm of clearance in front of the basin to allow for easy movement,” adds Jorge Hernandez. “For double vanities, a minimum width of 122cm is recommended, with 76cm of clearance in front.”
Shamila Iqbal
Shamila has extensive experience in bathroom products, installation and design innovations.
Which costs more – single or double sinks?
Sticking to a budget can be tricky when it comes to the latest bathroom design ideas and bathroom trends, but doing so is essential to ensure a project makes it to completion.
Generally speaking, single sinks are usually more affordable, even with materials such as porcelain or stone, when compared to double sinks. A single sink can cost anywhere from £60 for a countertop basin, to £300 for a combined vanity unit, while a double sink will often cost more due to the added materials and complexity. That said, double inset sinks might be a cheaper option than twin sinks side-by-side.
Single Arezzo Wall Hung Vanity Unit
The inset sink of this vanity unit is a generous 600mm.
Double Arezzo Wall Hung Vanity Unit
Double countertop sinks with a 1200mm vanity unit.
When is a single sink the right choice?
Single sinks are ideal for:
Smaller bathrooms or ensuites
Cloakrooms or downstairs loos
Guest bathrooms
Single sinks are great for a small bathroom remodel, perhaps one with under 120cm of space for a vanity unit. And that’s not to say that there aren’t stylish and forward-thinking design choices once a double sink is ruled out. In fact, many households might prefer a larger amount of worktop space for soaps, toothbrushes and make-up bags.
Shamila Iqbal continues: “Double basins may not be suitable in smaller bathrooms or compact ensuites, cramming a double basin into a small area can make the room feel cluttered especially in spa-style or minimalist bathrooms where a sense of openness and simplicity is preferred.”
Single sinks are also a better choice if you have a guest bathroom or infrequently-used small ensuite. There’s no point paying a premium for sanitarywear that won’t be used.
When should you choose a double sink?
(Image credit: BC Designs)
Double sinks are better for:
Family bathrooms
Larger ensuites
Double sinks are ideal alongside family bathroom ideas, where many bodies might by brushing teeth or washing faces at once. They can come in three ways: a double inset sink with a divide in the centre; an extra wide basin with two sets of taps functioning as two sinks; and two individual, but matching, sinks side-by-side.
“Freestanding twin basins generally require more space compared to inset double basins,” explains Shamila Iqbal. “Freestanding basins are standalone fixtures, meaning they often need clearance on all sides for aesthetic balance and ease of cleaning. This can add around 15-30 cm of additional space to their overall footprint. Inset double basins, on the other hand, are integrated into a single vanity or countertop, making them more compact and efficient for smaller bathrooms.”
Bathroom storage ideas and solutions will be more generous when it comes to most double sinks, as more space can be used for drawers or shelves.
Shop double bathroom sinks
Roper Rhodes Frame Wall Mounted Vanity
A great example of a double wide sink; useful for a busy morning as well as storage and installation.
Crosswater Castellon Plus Basin Unit
Twin sinks is practical for those who like a full basin to wash faces and hands at bedtime.
Elba Elm Wall Hung Double Basin Unit
This design ensures each person has their own space and storage with drawers to keep things tidy
FAQs
Does it cost more to install a double sink?
As touched on above, the cost of the double sink will naturally be more than of a single, but the increase in budget doesn’t start and stop with the fixture fee. “Double basins typically require more complex plumbing configurations so if your bathroom's existing plumbing doesn’t allow for this without major renovations, it may be impractical to install them,” advises Shamila Iqbal.
Do double sinks suit traditionally styled bathrooms?
“Homeowners can incorporate the trend for double basins in a traditionally styled bathroom by selecting design elements that blend modern functionality with classic aesthetics,” Jorge Hernandez. “For instance, choosing a double vanity with traditional-inspired details can maintain the classic charm. Incorporating materials like marble, wood, or stone for the countertops and basins can also help bridge the gap between contemporary and traditional design. To complement the double basins, consider using traditional-style faucets, such as cross-handles or lever taps.”
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Amy is an interiors and renovation journalist. She is the former Assistant Editor of Homebuilding & Renovating, where she worked between 2018 and 2023. She has also been an editor for Independent Advisor, where she looked after homes content, including topics such as solar panels.
She has an interest in sustainable building methods and always has her eye on the latest design ideas. Amy has also interviewed countless self builders, renovators and extenders about their experiences.
She has renovated a mid-century home, together with her partner, on a DIY basis, undertaking tasks from fitting a kitchen to laying flooring. She is currently embarking on an energy-efficient overhaul of a 1800s cottage in Somerset.
