Have you ever regretted choosing the wrong vanity that don‘t fit you? Are you unsure whether to give up storage space for double sink? Or do you worry that single sink vanity will be too small to share with your spouse in the morning rush hour? It might seem easy to pick a bathroom vanity, but many homeowners face a problem: double sink vs single sink vanity, which is better?
With the U.S. bathrooms trending towards more utility, the argument of single vs double sink has become as topical as ever. Now that both of the options have their merits and neither one of them appears to be the "best option" , so how do you decide which one fits your space better?
In this guide, Giving Tree Home provides a detailed explanation of the definitions of each type of sink style and thoroughly compares their differences in bathroom size, family size, budget, plumbing system, and daily usage scenarios. Ultimately, you will clearly understand which vanity can both visually and practically match your bathroom.
Understanding the Basics
A single sink vanity is a small bathroom appliance that has a sink, a faucet, a counter, and storage underneath. The width is generally between 18"and 60", popular size is 24", 30", 36"and 48". It comes in a wall-mounted or freestanding version and is suitable for small bathrooms.
A double sink vanity is a bathroom facility that has two sinks, two faucets, a common counter, and built-in storage. The width is generally between 60"and 96". Of course, there are also smaller like the 48" type. However, the most common size is 60", 72" and 84”. Floating and freestanding models are available and may be shared by two or more individuals.
Four Key Factors for Decision
You can take into account each of the points below and decide which kind of bathroom cabinet fits your home.
Bathroom Size and Layout
Before you start choosing a bathroom vanity, you must first determine how much space you have in your bathroom to fit it. Therefore, you need to carefully measure the space you have reserved for the vanity, including its width and depth.
Single-sink cabinets fit in most spaces, whether small apartments or spacious bathrooms. By contrast, double-sink cabinets need space size consideration.
Based on the common dimensions of a double-sink vanity, we roughly outline the required space size:
| Width of Double Sink Cabinet | Recommended Width of Bathroom | Recommended Area for Bathroom |
| 60" | 6-7 ft（72"- 84"） | ≥ 40 sq ft |
| 72" | 7-8 ft（84"-96"） | ≥ 50 sq ft |
| 84" | 8-9 ft（96"-108"） |
≥ 60 sq ft
|
In addition, the movement routes in the bathroom need to be considered.
- Allow operating space: It is more comfortable to leave at least 25"-30" standing space in front of the sink.
- Avoid conflicts: Ensure that the layout of the sink, toilet, and shower area doesn’t obstruct or interfere with each other's use.
- Door opening direction: Consider whether the door will bump into the sink or a person when opened.
Tips for measuring dimensions:
- Measure the width of the wall where the sink can fit, and the distance between the door, shower, and toilet to ensure a reasonable layout.
- Draw a simple sketch, marking the positions of each fixture, to see if a double sink would feel cramped.
How Many People Use the Bathroom Daily
If you need to share a bathroom with a partner or family, a double sink vanity cuts down on morning rush-hour chaos. It lets two people get ready at the same time without crowding.
For a single person's space, guest bathroom or family don't use at the same time, a single sink vanity is more than enough, and it frees up room for extra storage.
Cost Comparison
When it comes to cost, double sinks demand more materials and thus naturally have a higher price than single sinks. The price is usually twice that of single sink, and the long-term upkeep costs will also be higher.
For example, take two floating vanities—models W2615GTS00148 and W2615GTS00154. They share the same style and material, yet the double sink (W2615GTS00154) comes in at roughly more than twice.
Plumbing Considerations
A single sink vanity need one drain line and water supply. Use existing plumbing for your bathroom fixture, and no rerouting. Low bathroom renovation cost. Easy DIY or pro install.
A double sink vanity needs two drain lines and water supplies. If there is no pre-installed plumbing, you need to hire a pro for double sink vanity plumbing installation. Higher costs and longer installation time.
If you want to convert single sink vanity to double, you need to:
- Confirm existing supply lines and create two separate for each sink
- Check wall plumbing connections and install a new "T" or "Y" fitting
- Ask if floor reinforcement is needed for heavier units
When Single Sink Vanity Is the Right Fit
Small bathrooms(under 40 sq ft):
A single sink vanity for small bathroom layouts.
- Improves movement
- Leaves room for an extra storage cabinet
- Keeps the space from feeling crowded
Solo users or guest baths:
Guests rarely use the bathroom at the same time.
- Easier to maintain
- Provide enough functionality for occasional use
Budget-oriented remodels:
- Reduce procurement cost
- Skip the extra pipes and labor fees
- Low long-term maintenance cost
When Double Sink Vanity Is the Right Fit
Busy multi-person households:
A double sink vanity for master bathroom use:
- Reduces morning congestion
- Creates personal zones
- Improves daily comfort
Spacious bathroom space （More than 40 sq. ft.）:
Suitable for large space design:
- Maximizes counter and storage space
- Balances the room layout
- Improves flow and functionality
Families needing extra personal counter space:
Double sink vanities often provide:
- Wider countertop
- Better organization potential
- Clear separation of personal items
Final
Choosing between a single sink and a double sink vanity ultimately comes down to your space size, budget and the family usage habits. There’s no universally “better” option—just the one that fits your home and lifestyle best.
If you’re planning an upgrade, Giving Tree Home provides a full range of bathroom vanities in single sink and double sink styles, so that you can select the one that is most suitable for your bathroom. And for homeowners with small bathrooms who also want additional storage space, we also offer a curated selection of bathroom cabinets - each meticulously designed, beautifully crafted, and available in multiple sizes, suitable for most spaces.
