Many people searching for rental properties care deeply about bathroom and washroom facilities.
Among washroom fixtures, the standalone washbasin is particularly popular, especially among women.
However, there are several important points to keep in mind when installing a standalone washbasin.
In this article, we will cover the advantages and disadvantages of standalone washbasins, as well as recommended models.
What Is a Standalone Washbasin?
What exactly is a standalone washbasin?
Let's start by looking at its features and types.
Features of a Standalone Washbasin
As the name suggests, a standalone washbasin is a washbasin installed separately from the bathroom and toilet.
It typically consists of a basin and faucet combined in one unit, with a mirror and storage space included.
Differences from a Unit Bath
The main difference between a unit bath and a standalone washbasin is the installation space.
Unit baths come in two types: a three-piece unit that combines the bathroom, toilet, and washbasin all in one, and a two-piece unit where the bathroom and washbasin are integrated while the toilet is separate.
The three-piece unit takes up minimal space because all washroom facilities are combined.
It also reduces construction costs since all necessary parts can be manufactured as a set.
The two-piece unit requires separate space for the toilet but makes it easier to let guests use the toilet, and takes up less space than a standalone washbasin.
Three-piece units are especially common in business hotels, and in rental properties they are suited for studio and 1K apartments for single occupants.
Types of Washbasins
When most people think of a washbasin, they probably picture a unit with a faucet, basin, and storage all in one.
However, technically, a washbasin refers only to the combination of a faucet and a wash bowl.
It is primarily used for handwashing and face washing, may include a mirror, but has almost no storage space.
What is commonly called a washbasin is officially referred to as a vanity unit (洗面化粧台).
Vanity units with storage come in the following two types.
Unit Type
The unit type is a vanity unit that integrates the faucet and wash bowl with components such as a mirror, storage space, and lighting.
It is also called a cabinet type or freestanding type.
Because it is assembled from standardized parts, its size and height are fixed, allowing you to choose based on the available space and the user's height.
System Type
The system type is a vanity unit that allows you to combine components such as the wash bowl and storage to your own preference.
It is also known as a counter type or component type.
Unlike the unit type, size and width can be customized down to the millimeter based on available space and usability.
However, some manufacturers offer only fixed sizes.
Benefits of Retrofitting a Standalone Washbasin in a Rental Property
Standalone washbasins offer a variety of benefits, and retrofitting one in a rental property is entirely possible.
Let's look at the specific advantages of adding a standalone washbasin after the fact.
Improved Usability
In a unit bath, outlets are generally not installed at the washbasin due to the risk of electric shock.
By contrast, most standalone washbasins come with an outlet, allowing tenants to use electrical appliances such as hair dryers and shavers.
Even when a family member or roommate is bathing, the washbasin remains accessible, saving time.
Improved washbasin usability will likely increase tenant satisfaction.
Easier Grooming
Many people dry their hair or do their skincare routine in front of a mirror right after bathing.
With a separate, standalone washbasin, there is no steam or humidity, and no concern about a fogged mirror, making it possible to groom comfortably.
More Storage Space
Washbasins in unit baths typically offer only a small shelf for items like toothbrushes, with almost no real storage.
Standalone washbasins, on the other hand, provide ample storage for frequently used items such as cosmetics and hair dryers, keeping them accessible at a moment's notice.
In addition, stock items like shampoo and detergent can also be stored away, making it extremely convenient.
No Concern About Steam or Moisture from the Bathroom
When a washbasin is located inside the bathroom, steam and humidity inevitably encourage mold growth.
Furthermore, water splashing from the bath or shower leads to mineral deposits and grime that are difficult to clean.
A standalone washbasin is easier to keep clean and sanitary.
Space for a Washing Machine
Installing a standalone washbasin requires a relatively generous amount of space.
If there is room to spare, a washing machine can be placed alongside it.
Standalone washbasins are generally installed adjacent to the bathroom, and in units equipped with a bathroom dryer, laundry can be hung to dry immediately after washing, streamlining household chores.
Doubles as a Changing Area
The space housing a standalone washbasin can also serve as a changing area.
Changing clothes there keeps you out of plain sight, so there is no need to time your bath around the presence of family members or friends.
Drawbacks of Retrofitting a Standalone Washbasin
While the benefits are numerous, standalone washbasins do come with some drawbacks.
Be sure to understand these points before deciding to install one.
Space Is Required
The first drawback is that a large installation area is needed.
Standalone washbasins are generally 600–900 mm wide, 400–600 mm deep, and 1,900 mm tall.
Since the installation space must exceed these dimensions, in rental properties with limited floor area, the changing area and surrounding space may become cramped.
Cost
The second drawback is the cost involved in retrofitting a standalone washbasin in a rental property.
New washroom installation work typically costs approximately 200,000 to 600,000 yen.
If the unit is on the second floor or higher, extending the plumbing adds further expense.
Installation costs can be reflected in the rent, but higher rent may lead to vacancies.
Since standalone washbasins are popular among women, tenants in properties that attract a predominantly female demographic may accept slightly higher rents; however, in properties targeting cost-conscious single men, the vacancy risk increases.
When considering installation, it is important to take tenant needs into account.
More Cleaning Required
When cleaning a unit bath, both the bathtub and washbasin can be rinsed down together with the shower.
However, a standalone washbasin must be cleaned separately from the bathroom.
Compared to a two- or three-piece unit bath, having to clean each area individually may feel burdensome to some people.
Additionally, many standalone washbasins include an outlet.
Care must be taken during cleaning to avoid splashing water near the outlet.
The cleaning effort unique to standalone washbasins may feel like a hassle for those who dislike cleaning.
Before Retrofitting — Understand the Demand for Standalone Washbasins
Because a standalone washbasin is provided separately from the toilet and bathroom, the sense of cleanliness and comfort it offers is a major appeal.
However, whether or not a rental property has a standalone washbasin directly affects how livable tenants find it.
Before retrofitting, it is important to understand whether demand for a standalone washbasin is high among the target tenant demographic for the property.
Below, we outline the characteristics of tenants who have high versus low demand for standalone washbasins.
Tenants with High Demand for Standalone Washbasins
First, let's look at the characteristics of tenants who have a strong preference for standalone washbasins.
Couples and Married Pairs
If the property primarily attracts couples or married pairs rather than single-person households, demand for a standalone washbasin will be high.
This is because two or more occupants require more storage space and a larger washroom area.
A standalone washbasin is spacious enough for two people to use simultaneously without getting in each other's way, enabling efficient use.
Even when one person is bathing, the other can still access the washbasin, which adds convenience and peace of mind.
Being unable to use the washbasin while someone else is in the bath is a real inconvenience.
For the same reason, standalone washbasins are in high demand not only among couples but also among families.
Tenants Who Frequently Have Guests
Some tenants regularly invite friends or acquaintances to their home.
When guests visit, they often need to use the washbasin.
In such cases, if the washbasin is not standalone, guests may hesitate to use it or feel uncomfortable doing so.
A standalone washbasin means that even unexpected guests or overnight visitors will have no trouble.
Tenants Who Care About Grooming
Women in particular often use the washbasin for daily styling routines.
In a unit bath, the mirror tends to be small, making it difficult to check your appearance properly.
By contrast, a standalone washbasin with a large mirror and ample storage is well suited for styling and grooming.
Since most models include an outlet, styling is convenient as well.
Recently, more men are also paying close attention to their grooming.
Many find that a standalone washbasin offers superior usability.
Tenants Who Don't Mind Extra Cleaning
With a unit bath, the tub and washbasin can be cleaned together in one go, but a standalone washbasin adds another area that needs separate attention.
For tenants who don't find the additional cleaning burdensome, the convenience of a smoother daily routine makes the demand high.
Tenants with Low Demand for Standalone Washbasins
Next, let's look at the characteristics of tenants who have less interest in standalone washbasins.
Single Men
Single male tenants often do not place much importance on having a standalone washbasin.
This is because many are content with the bare minimum needed for daily life, or prioritize other features over the washbasin.
Those who own few possessions and have few particular preferences see no reason to pay higher rent for a standalone washbasin.
Tenants Who Find Cleaning Burdensome
A standalone washroom means more areas to clean, which some tenants find off-putting.
Even in a unit bath, detailed cleaning of the washbasin is necessary, but with fully separate facilities, there are three distinct areas to clean: the bathroom, the toilet, and the washbasin.
Tenants who dislike or struggle with cleaning will naturally have lower demand for a standalone washbasin.
Tenants Who Prioritize Low Rent
Rental properties with standalone washbasins tend to command higher rents due to the added equipment costs.
While rent levels vary by area and location, properties with standalone washbasins are generally more expensive than those with unit baths.
Many tenants who want to keep rent as low as possible, or who would compromise on the washbasin type if it means higher rent, fall into this category.
If cost-consciousness is a dominant trait among the target tenant base, there may be no need to go out of the way to install a standalone washbasin.
Estimated Costs for Retrofitting a Standalone Washbasin
Here is a brief overview of the typical costs involved in retrofitting a standalone washbasin.
For a rental property that does not currently have one, retrofitting requires covering both the purchase price of the unit and the new installation work simultaneously.
The price of a standalone washbasin varies by type and size, but the smallest size suitable for a studio apartment is said to cost approximately 70,000 to 150,000 yen.
Adding floor opening work and plumbing installation can increase costs by a further 150,000 to 300,000 yen.
Taking into account approximately 10,000 yen for disposal and other miscellaneous expenses, the total cost comes to approximately 230,000 to 460,000 yen.
In rental properties, plumbing costs tend to increase the higher the floor, so units on the second floor or above will incur higher charges.
Introducing standalone washbasins throughout an entire rental building would easily exceed one million yen.
Installation takes approximately two to three days per unit, so if both budget and scheduling allow, retrofitting is a viable option.
How to Keep Retrofit Costs Down
Many landlords looking to retrofit a standalone washbasin in a rental property will naturally want to minimize costs.
Here are some strategies for doing so.
Choose a Cost-Effective Product Line
Even within the same manufacturer, product lines vary widely, making it possible to select a standalone washbasin that suits specific needs and preferences.
Since price ranges differ between product lines, choosing a more affordable line helps reduce retrofit costs.
There may be cost-effective standalone washbasins from lesser-known manufacturers or product lines, so explore options online, through manufacturer catalogs, and at showrooms.
Match Features and Design to Actual Needs
Highly functional or intricately designed washbasins tend to be more expensive.
Balancing some design preferences with practical needs is key to keeping costs in check.
Rather than opting for a model that has every possible feature, focus on high-value functions such as mirror-back storage and easy-to-clean materials and shapes.
Keeping the design as simple as possible also helps to reduce retrofit costs.
Obtain Multiple Quotes
When trying to keep retrofit costs down, it is advisable to request quotes from multiple contractors.
Since installation fees vary by contractor, comparing quotes makes it possible to select a more affordable option.
That said, be cautious of quotes that seem extremely low.
Gathering multiple quotes also gives you a general sense of market rates, helping you avoid contractors whose pricing is far outside the norm.
Key Points for Choosing a Standalone Washbasin
One of the most challenging aspects of retrofitting a standalone washbasin is choosing the right model.
To maximize tenant satisfaction, keep the following selection criteria in mind when deciding on which unit to install.
Here are the key points to consider when choosing a standalone washbasin.
Size
Size is a critical factor when retrofitting a standalone washbasin.
System-type washbasins can be customized to the millimeter, while unit types come in fixed sizes and widths.
Choosing without checking measurements may result in a unit that does not fit the available space.
When selecting a unit type, carefully verify the width, depth, and height to ensure it fits the installation area.
Storage Capacity
Many tenants want to store items such as toothbrushes, cups, and cosmetics in their washbasin area.
Therefore, choosing a model with superior storage capacity can help increase tenant satisfaction.
For example, a washbasin with mirror-back storage can secure usable storage space even in a compact area without taking up extra room.
Being able to keep items out of sight also helps the washbasin area look tidy.
If space allows and additional storage is desired, installing a side cabinet is a good option.
Design
Design is also worth considering when selecting a standalone washbasin.
An attractively designed washbasin can become a selling point during property viewings.
When choosing a high-design standalone washbasin, prioritize how well it harmonizes with the surrounding space.
A washbasin that suits the atmosphere of the room creates a cohesive, refined look.
Materials range widely — from enamel and artificial marble to stainless steel and wood — so choose one that suits the installation space.
Keep in mind, however, that complex designs and premium materials will drive up installation costs, so factor in your budget accordingly.
Ease of Cleaning
Standalone washbasins are prone to mineral deposits and mold, requiring regular cleaning to stay sanitary.
However, a washbasin that is difficult to maintain can become a burden for tenants.
In standalone washbasins, dirt tends to accumulate in the gaps between components.
For example, a model where the wash bowl and counter are integrated has no gaps, making it harder for dirt to build up and easier to clean.
Ease of maintenance also depends on the materials used for the bowl and counter.
Some manufacturers use proprietary technologies to develop surfaces that resist and release dirt easily, so be sure to carefully review the performance specs of each product.
Convenient Features to Look for in a Standalone Washbasin
Standalone washbasins can be equipped with a variety of useful features.
As a reference for your retrofit, here are three features that add particular convenience.
Storage Behind a Three-Way Mirror
Standalone washbasins with storage behind a three-way mirror offer generous storage capacity.
This feature is especially appreciated in properties housing families or tenants with large cosmetics collections.
With a three-way mirror, the storage behind it is divided into sections, allowing items to be organized neatly.
Additionally, the side panels of a three-way mirror can be angled to reveal profiles and the back of the head that are difficult to see in a standard mirror — a practical bonus.
Single-Lever Mixer Faucet
A single-lever mixer faucet allows water flow and temperature to be adjusted with just one lever.
With separate hot and cold handles, users must operate each individually to find the right temperature.
However, a single-lever mixer faucet allows instant switching between hot and cold water simply by moving the lever left or right.
The lever requires only light pressure, making it easy for young children and elderly users to operate.
Models with an extendable faucet spout are also convenient for washing hair at the sink or rinsing out the bowl.
Child Mirror
A child mirror is a mirror mounted at a lower height.
Children who are not yet tall enough may not be able to reach a mirror at standard height.
With a child mirror, children can easily check their appearance without assistance.
There is no need to stand on a stool, which also prevents the risk of a child falling.
A child mirror can also create a visual effect of making the washbasin area feel more spacious.
Recommended Standalone Washbasins
With so many models available from various manufacturers, many landlords find it difficult to decide which standalone washbasin to choose.
Here are ten recommended products from major manufacturers to help guide your selection.
TOTO Octave Slim
The TOTO Octave Slim is a slim standalone washbasin that is easy to install even in limited spaces.
The center bowl plan, with the bowl positioned in the middle, offers three width options: 600 mm, 750 mm, and 900 mm.
Choosing an offset bowl plan allows for the addition of an open shelf on either side or an under-counter cabinet that can also serve as a small table.
The bowl is shaped to channel water efficiently toward the drain, which features a one-touch push button for easy opening and closing.
The mirror can be opened from either side, and the design incorporates a swing three-way mirror whose center panel can be pulled forward for a closer look.
The entire back of the mirror consists of storage space, convenient for keeping small items organized.
TOTO Sacua
The TOTO Sacua is a standalone washbasin characterized by its square-shaped ceramic bowl.
The bowl is designed to be deep and wide, reducing water splashing around the basin and making it easy to hand-wash clothes or wash hair.
The area around the faucet has a flat profile, making it resistant to dirt and easy to clean.
A built-in function sprays "clean sterilizing water" at the press of a button, keeping the drain area and toothbrushes consistently hygienic.
The under-sink storage is also deep, providing ample space for a large number of items.
Three-way mirror back storage is included as well, so small accessories can be stored together in one place.
The Sacua also offers a wide range of compatible cabinets that can be installed around the washbasin, allowing for customization to suit the available space.
LIXIL Lifla
The LIXIL Lifla is a standalone washbasin distinguished by its compact-depth bowl.
While the standard bowl depth is 540 mm, the Lifla measures only 370 mm deep, making it suitable for installation in limited spaces.
Despite the compact depth, the bowl is designed to be deep and wide, so it does not feel cramped to use.
Under-sink storage is included, accommodating cleaning supplies and more.
The mirror can be selected from several options, including a wood-framed single mirror, a large single mirror, and a single mirror with storage.
Faucet options are also plentiful, ranging from mixer faucets to tall gooseneck faucets for high-reach applications.
LIXIL Esta
The LIXIL Esta is a compact standalone washbasin with a refined design.
The wash bowl is available in two styles: a sleek bowl-integrated type and a vessel type.
With a depth starting from 44 mm, it is well suited for retrofitting in rental properties where space is often at a premium.
The mirrored cabinet has a furniture-like finish in a wood-grain style.
Six color variations are available, allowing selection to match the surrounding space.
Faucet options range from simple designs to gooseneck styles that make it easy to fill vases and similar containers, giving tenants the flexibility to choose what works best for them.
LIXIL Oft
The LIXIL Oft is a standalone washbasin designed with a focus on comfort and eco-friendliness.
At 500 mm deep, it is compact enough to install in narrow spaces.
The ceramic bowl is available in widths of 600 mm and 750 mm, offering a spacious feel that is easy to use.
The washbasin height can be selected from 1,780 mm, 1,800 mm, and 1,850 mm, and the mirror height can be adjusted in 10 mm increments.
The Oft allows an electric water heater to be installed beneath the basin, enabling hot water use even in locations without hot water supply piping.
Standard features also include LED lighting, an eco handle designed to minimize water waste, a fine-spray showerhead with high water-saving performance, and an anti-fog mirror coating that requires no electricity — all of which help reduce tenants' utility costs.
Panasonic M-Line
The Panasonic M-Line is a standalone washbasin whose strengths are a durable bowl and generous storage capacity.
The artificial marble wash bowl is highly impact-resistant and built to withstand everyday use.
The under-sink storage cabinet is compact at approximately 420 mm deep, giving the unit a clean appearance that avoids a cramped feeling even in small spaces.
The mirror is available as either a single mirror with a small shelf on the side or a three-way mirror with storage behind each panel.
Compact yet highly functional in terms of storage, this model is sure to be appreciated by tenants.
The waterproof coating on the mirror prevents fogging without the need for electricity or a heater — another welcome feature.
Panasonic C-Line
The Panasonic C-Line is a standalone washbasin designed with an emphasis on usability and hygiene.
With a mid-height mirror installed, children can check their appearance and get ready without climbing onto a stool, ensuring safety.
The counter includes a wet area where damp items can be placed.
A slight slope ensures excellent water drainage.
The wash bowl is integrated with the counter, giving it a clean appearance while also making it easy to wipe down.
The mirror door handles and faucet lever can be selected in antibacterial materials for added hygiene.
Counter and cabinet sizes are available in a wide range, allowing storage space to be freely customized to suit the available area.
Takara Standard Famille
The Takara Standard Famille is a sleek and functional standalone washbasin.
It comes in a cabinet type with width options ranging from 600 mm to 1,200 mm.
Cabinet options include a two-stage slide type, a door type with a drawer, and a standard door type.
The interior of the storage is made of enamel, which is fire-resistant, meaning a hair iron that has just been turned off can be stored immediately.
The counter features a wet area for damp items and a dry area for items you want to keep dry, enabling practical organization.
Mirrors, faucets, and other accessories can be freely selected to match your budget and functional requirements.
Takara Standard Rejust
The Takara Standard Rejust is a standalone washbasin that accommodates non-standard sizes with ease.
The cabinet integrated with the wash bowl is available in two counter styles: a high-back counter and a flat counter.
Width options range from 750 mm to 1,200 mm for the high-back counter, and from 750 mm to 1,500 mm for the flat counter.
The flat counter can be fine-tuned in 1 cm increments, enabling a precise fit for the available space.
Cabinet types include a two-stage slide type, a door type with a drawer, and a standard door type.
A touchless faucet, laundry cabinet, and a wide variety of mirror types and other accessories are also available, making full customization possible.
Conclusion
Rental properties with standalone washbasins are popular among tenants, so retrofitting one has the potential to improve occupancy rates and reduce tenant turnover.
If the property you manage has sufficient space, it is worth considering a retrofit.
However, rather than installing one simply because it is convenient, it is important to carefully evaluate whether there is genuine demand for it among your target tenants.
Use the selection criteria and recommended products introduced in this article as a reference, and work toward creating a rental property that is more functional and comfortable for residents.
