How to Add a Second Sink in a Bathroom: DIY Guide

Transform Your Bathroom: Adding a Second Sink

In the quest for a more functional and luxurious bathroom, adding a second sink is a popular and practical upgrade. Not only does it enhance the space's aesthetics, but it also increases its practicality, especially in shared bathrooms. Here's a comprehensive guide on how to add a second sink in your bathroom, ensuring your project is both functional and visually appealing.

Assess Your Space and Needs

Before you start, evaluate your bathroom's layout and your specific needs. Consider the following:

  • Available space: Measure the area to ensure it can accommodate a second sink and vanity.
  • Plumbing: Check if there's an existing water supply and drain line nearby. If not, you may need to hire a professional plumber.
  • Budget: Determine how much you're willing to spend on this project.
  • Style: Choose a sink and vanity that complements your bathroom's existing decor.

Choose the Right Sink and Vanity

Sinks and vanities come in various shapes, sizes, and styles. Here are some options to consider:

How to Add a Second Bathroom Sink? | A Step-By-Step Procedure!

Sink Type Pros Cons
Undermount Easy to clean, modern look Requires a solid surface countertop
Vessel Stylish, can be installed on various countertops Requires additional support, may not be suitable for all decors
Wall-Mounted Space-saving, easy to clean Requires professional installation, may not be suitable for all plumbing setups

Gather Tools and Materials

Depending on your skill level and the complexity of your project, you may need the following tools and materials:

  • Tape measure
  • Circular saw
  • Drill
  • Screwdriver
  • Level
  • Plumber's putty
  • Caulk
  • New sink and vanity
  • Pipes and fittings (if needed)

Install the Vanity and Sink

Follow these steps to install your new sink and vanity:

  1. Measure and mark the vanity's location. Ensure it's level and centered.
  2. Attach the vanity to the wall using screws or brackets, following the manufacturer's instructions.
  3. Install the sink according to its type. For undermount sinks, attach it to the countertop from below. For vessel sinks, place it on the countertop and secure it with clips or screws.
  4. Connect the sink's drain and water supply lines to the existing plumbing or install new pipes as needed.
  5. Test the sink for leaks, then seal any gaps with caulk.

Plumbing Considerations

If your bathroom's plumbing is not up to par, you may need to hire a professional plumber. They can install new pipes, ensure your setup is up to code, and prevent potential leaks or damage. Always prioritize safety and compliance with local building codes.

How To Add A Second Bathroom Sink - Artcomcrea

Enjoy Your New Sink

With your new sink installed, you can now enjoy a more functional and luxurious bathroom. Consider adding complementary decor, such as new fixtures, lighting, or wall art, to complete the look. Regular maintenance, like cleaning and inspecting your plumbing, will help ensure your new sink continues to serve you well for years to come.

Reference

How to Make a Double Sink in Your Home | Bathroom Remodel DIY

30.10.2021 ... Do you want to turn your single sink into a double vanity? I can show you how! In this video, I'm opening my wall, teeing off my plumbing ...

How to Add a Second Bathroom Sink? | A Step-By-Step Procedure!

How to Add a Second Bathroom Sink? | A Step-By-Step Procedure!

Visual inspiration for your project.

Reference

How to Upgrade Bathroom Vanity | Can You Add a Second Sink?

30.07.2025 ... Mr. Handyman explains how to convert a single-sink vanity into a double-sink setup. · Remove the old vanity and disconnect plumbing · Measure ...

How To Add A Second Bathroom Sink - Artcomcrea

How To Add A Second Bathroom Sink - Artcomcrea

Visual inspiration for your project.

Reference

How to Add a Second Sink to a Bath Vanity | This Old House

25.09.2014 ... This Old House plumbing and heating expert Richard Trethewey shows how to install a new sink into an existing vanity.

How To Install A Double Sink Bathroom Vanity Bathroom Vanity With

How To Install A Double Sink Bathroom Vanity Bathroom Vanity With

Visual inspiration for your project.

Reference

Does anyone have experience adding a second sink to a single ...

28.12.2024 ... Converting single to double vanity plumbing process ... Single to double vanity plumbing can be a bit of a project. You'll need to consider a few ...

How Much Does It Cost To Add A Second Sink In Bathroom at Maria Medina blog

How Much Does It Cost To Add A Second Sink In Bathroom at Maria Medina blog

Visual inspiration for your project.

Reference

Will adding a second sink in a bathroom with only one sink currently ...

23.03.2021 ... The pressure may be slightly reduced while in use. Most homes have at least 1/2” plumbing and the sink cartridges usually have ~1/8” orifices in the faucet on ...

9 Inspiring Double Vanity Bathroom Ideas | Hazley Builders

9 Inspiring Double Vanity Bathroom Ideas | Hazley Builders

Visual inspiration for your project.

Reference

Want To Add a Double Sink Vanity? Here's What You Need To Know

27.02.2021 ... Double sink vanities add glamor and efficiency · Double vanities cost $750 to $3,200 on average · A double sink vanity boosts your home's ...

How Much Does It Cost To Add A Second Sink In Bathroom at Maria Medina blog

How Much Does It Cost To Add A Second Sink In Bathroom at Maria Medina blog

Visual inspiration for your project.

Reference

converting one sink to a double vanity if you're curious ... - Instagram

09.01.2025 ... if you're curious to see the process of taking one sink and adding a second watch until the end! as soon as we saw this bathroom we knew this ...

How To Change Plumbing To Add A Second Sink | Storables

How To Change Plumbing To Add A Second Sink | Storables

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Reference

Single vs Double Sink Vanity: The 5-Minute Decision Guide

Double Sink Bathroom Vanities Explained. Double sink vanities feature two sinks with varying amounts of space between them depending on overall vanity width.

How To Add A Second Bathroom Sink - Artcomcrea

How To Add A Second Bathroom Sink - Artcomcrea

Visual inspiration for your project.

Reference

Adding a Double-Sink Vanity To Your Bathroom - This Old House

Hooking Up a Second Bathroom Sink · Shut off the water supply and install new T-fittings to run supply lines to the new sink. · Adapt the existing drain by ...

Double Bathroom Sink Plumbing Diagram

Double Bathroom Sink Plumbing Diagram

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Reference

How Much Does It Cost to Add a Second Sink in the Bathroom?

Labor and Permits · Labor: $1,000 – $2,000 depending on scope · Permits (if required): $200 – $500. Co-op and condo buildings may also require board ...

A visual guide to plumbing a double sink vanity

A visual guide to plumbing a double sink vanity

Visual inspiration for your project.

Reference

Bathroom Double Sink vs Single - Smart or Fad? : r/InteriorDesign

10.02.2021 ... Our plumbing is already set up for a double sink, although I'd need to do a fair amount of adjustments to accommodate the 60" vanity anyways.

How To Add A Second Bathroom Sink - Artcomcrea

How To Add A Second Bathroom Sink - Artcomcrea

Visual inspiration for your project.

Reference

How to Turn a single bathroom sink into a double sink with this hack

15.11.2020 ... Easily install a double sink. How to Turn a single bathroom sink into a double sink with this hack . 84K views · 5 years ago ...more ...

A visual guide to plumbing a double sink vanity

A visual guide to plumbing a double sink vanity

Visual inspiration for your project.

Reference

How to Add a Second Bathroom Sink? | A Step-By-Step Procedure!

05.12.2021 ... How to Add a Second Sink in a Bathroom: Step-by-step Guide · 01. Mark the Holes of the Sink · 02. Cut the Hole in the Sink · 03. Mount the ...

How Much Does It Cost To Add A Second Sink In Bathroom at Maria Medina blog

How Much Does It Cost To Add A Second Sink In Bathroom at Maria Medina blog

Visual inspiration for your project.

Reference

How to convert a single sink vanity to a double sink vanity? - Facebook

03.01.2024 ... It really made it very easy. A contractor did install it for us but the plumbing work, and cost, were reasonable. Been in for 5 or 6 years now ...

Bathroom Upgrade: How To Add a Second Sink to a Bath Vanity | Bathrooms ...

Bathroom Upgrade: How To Add a Second Sink to a Bath Vanity | Bathrooms ...

Visual inspiration for your project.

Reference

How to Plumb Two Sinks for One Drain - YouTube

27.03.2024 ... Today we are plumbing two sinks for one drain. You may want to install two sinks instead of one when retrofitting a bathroom.

How Much Does It Cost To Add A Second Sink In Bathroom at Maria Medina blog

How Much Does It Cost To Add A Second Sink In Bathroom at Maria Medina blog

Visual inspiration for your project.

Reference

How much does it cost to add a second sink in bathroom? - Quora

07.11.2020 ... The cost of double bathroom vanity will vary from one retailer to another. The average price range is about $600 to $1,200. However, you can ...

Bathroom Sink Installation

Bathroom Sink Installation

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Reference

Single to Double Vanity | How to Install a Bathroom Vanity - YouTube

22.02.2022 ... In this video I go over all of the steps that I took to go from a dull single vanity to our new double vanity. The best part about this ...

How Much Does It Cost To Add A Second Sink In Bathroom at Maria Medina blog

How Much Does It Cost To Add A Second Sink In Bathroom at Maria Medina blog

Visual inspiration for your project.

Reference

my mother-in-law. Turning our single sink vanity into a double sink ...

02.07.2024 ... So here's how I'm DIYing it into a full bathroom all by myself. So I could install my Delta ProClean Hand Shower, which has a special trick. But ...

Installing Bathroom Sink Plumbing – Bathroom Guide by Jetstwit

Installing Bathroom Sink Plumbing – Bathroom Guide by Jetstwit

Visual inspiration for your project.

Reference

How to Connect Two Sinks to One Drain Without Cutting ... - YouTube

03.10.2025 ... Thinking about upgrading your bathroom from a single sink to double sinks ... Watch now and discover how to create a functional double sink setup ...

Visualizing the Plumbing System for a Double Bathroom Sink

Visualizing the Plumbing System for a Double Bathroom Sink

Visual inspiration for your project.

Reference

Two sink bathroom layout ideas for small spaces - Facebook

21.02.2025 ... Put a double sink in where the sink and closet are. Then for storage use shelves on the vanity all the way to ceiling. And next to toilet for ...

How Much Does It Cost To Add A Second Sink In Bathroom at Maria Medina blog

How Much Does It Cost To Add A Second Sink In Bathroom at Maria Medina blog

Visual inspiration for your project.