Can You Turn A Single Sink Into A Double?

Sharing a bathroom with a spouse, family member, or roommate can make things take twice as long, as you might have to wait for them to finish using the sink before you can start your routine. Or, maybe you’re sick of multitasking in the kitchen with a single-basin sink. Whether you’re considering upgrades for the kitchen or bathroom, adding an extra basin can make a significant difference.

But can you upgrade to a double sink without drastically remodeling the entire space? Yep, for the most part, you can. However, it might not be feasible in areas where space is an issue. In this article, we break down the ins and outs of upgrading to a double sink, so stick around to learn more!

Is It Possible To Switch A Single Sink For A Double?

Generally speaking, switching a single sink out for a double one is possible. Of course, it might not be feasible in areas with space constraints, as the added sink basin consumes extra space. That said, if you have plenty of room and access to the plumbing, you shouldn’t have any issues installing a second sink (or double basin sink) in your kitchen or bathroom.

In The Kitchen

A double sink can be the perfect finishing touch to a kitchen, as it allows you to multitask by using the basins for separate things. Maybe you have a sink full of soapy water on one side for washing and keep the other free for rinsing fresh produce or cleaning suds from the clean dishes.

If you currently have a single-basin sink, you might be able to switch it out for a double-basin sink. Single basin sinks are usually between 24” and 36” wide, whereas double basin sinks usually stretch between 22” and 48”. So, depending on the size of your current sink, you might need to ensure the sink will fit in the allocated space.

If the sink is smaller than your single basin sink, it won’t work, as the sink hole is already cut. You can choose a larger sink as long as the base cabinet offers enough room for the larger footprint. Be cautious when selecting a sink of the same width, as the cutout might not work perfectly for the new sink.

In The Bathroom

If you and your significant other, roommate, or family member share the same bathroom, installing two sinks can make morning routines go much quicker. This way, you don’t have to wait for the other person to finish their morning routine before completing your own.

Adding a second sink in your bathroom is doable in many cases, providing you have the space. You might be able to add a second sink to an existing vanity, but it’ll depend on the vanity’s layout, as a second sink might not work with some designs. Usually, it’s easier to switch out a single-sink vanity for a double vanity.

Before you commit to a new vanity or bathroom sink, measure the space to ensure plenty of room for a second sink or double vanity.

Do You Need To Adjust The Plumbing When Switching A Single Sink For A Double?

Sink Plumbing

Since you’re no longer dealing with one drain, you’ll need to make some adjustments to the plumbing beneath the sink.

You can usually tie the drain pipe together when working with a kitchen sink. If you have a garbage disposal, both sinks usually drain through the appliance before entering the plumbing system beyond it. So, with kitchen sinks, switching to a double sink is relatively simple. Of course, you’ll need to ensure you have enough space for the extra plumbing, but it’s not overly complicated.

On the other hand, if you’re installing a second sink in your bathroom vanity, the plumbing setup can be more complex. You’ll need to rough in the plumbing to replace the old single water lines with dual water lines (you’ll need an extra bathroom faucet for the new sink) and drains to match.

In most cases, you can use the same P-trap for both sinks as long as they’re within 30 inches of each other. Using separate traps can actually cause issues, like air pockets that can block one or both drains.

If you’re unfamiliar with the ins and outs of plumbing, it’s probably best to hire a professional to handle this piece of the project. Or, to simplify the entire process, you can always outsource the whole project to a licensed professional – it’s up to you!

Frequently Asked Questions (FAQs)

Double Bath Vanity

How Much Does It Cost To Replace A Kitchen Sink?

If you’re replacing your single-basin kitchen sink with a double-basin sink, you can expect to pay between $100 and $1,000. This includes most of the project, including removing and hauling away the old sink, installing the new sink, and plumbing hookups.

However, these costs don’t include the cost of the kitchen sink itself. If you choose a high-end sink, you can expect to pay more. In addition, complex installations and sink cutout adjustments can add to the project’s final cost.

Before you start your project, you can ask local contractors for a quote, which will give you an idea of what you’ll pay for your specific project.

How Much Does It Cost To Replace A Single Sink With A Double Sink Vanity?

The exact cost for your bathroom project hinges on a few factors. Some installations are more complex than others, so some are pricier. However, since that isn’t helpful, we can offer the average cost. For many homeowners in the United States, a vanity installation costs roughly $1,500.

On the low end, replacing your vanity may be as low as $500, but it could stretch to $4,00 or more on the high end. Of course, the higher costs are usually associated with complex installations and custom designs. In addition, if you choose to add extra components to the project, such as replacing the backsplash or removing the old vanity, you can expect to pay more.

So, before the project, it doesn’t hurt to check with a few contractors for quotes. Then, you can choose the best option for you and your budget!

How Much Space Do You Need For A Double Vanity?

For comfortable use, it’s best to space double sinks in a bathroom vanity at least thirty inches apart. This gives plenty of space for two people to comfortably use the sinks simultaneously. Most vanities range between 60” and 72” (six feet) wide, although the exact measurements depend on the exact vanity.

Some models are designed for compact spaces, with some as small as 48” wide. Of course, these vanities may feel a bit cramped as the sinks almost bump against each other. Double vanities are usually best suited to larger, more roomy bathrooms, but you can install them in smaller spaces.

However, if you install the double vanity in a smaller bathroom, ensure there will be enough space between the shower and toilet, as it’s best not to affect the functionality of either.

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