The Complete Washlet Guide for Renters—From Checking Installation Eligibility to DIY Setup Steps

Rentals and Washlets—Essential Facts Many Don't Know

Warm water toilet seats (washlets or shower toilets) have become standard fixtures in many Japanese homes. However, in rental properties, washlets are often not installed from the start, and more and more tenants want to either have them pre-installed before moving in or install one themselves.

This article covers everything you need to know about using washlets in rental properties, from basic facts to practical steps.

What to Check About Toilet Equipment During a Property Viewing

Whether One Is Already Installed Always check the toilet seat during your viewing. If there's a control panel or remote on the side or wall, a washlet is already installed. However, even if there's a power outlet next to the seat, it might just be a regular toilet, so be careful.

Presence or Absence of a Power Outlet To install a washlet later, you'll need a 100V outlet in the toilet. Many properties today have bathroom outlets, but older properties may not. Without an outlet, you'll need electrical work, which typically requires landlord permission in a rental.

Checking the Water Line Connection A washlet connects to the toilet's shutoff valve. You should check whether the current shutoff valve's shape and size are compatible with washlet installation. However, this can be difficult to assess during a viewing, so it's best to contact your building management if you're interested in installation.

How to Request Permission from Building Management

Why Permission Is Necessary In a rental contract, installing or modifying equipment typically requires landlord or building management permission. Washlets are often considered "removable electrical appliances" and may not require permission in some cases, but this varies by property. To prevent potential problems like water leaks, we strongly recommend getting written permission beforehand. If you're considering other modifications or DIY work besides washlets, check [DIY and Restoration Rules for Rental Properties](/column/renovation-diy-rules) first to keep your judgment consistent.

What to Communicate When Applying When contacting your building management, clearly explain the following:

• •You want to remove the current regular toilet seat and replace it with a washlet
• •You will restore it to its original condition upon move-out (or keep the original seat for reinstallation)
• •Specify whether you'll do the work yourself or hire a professional

In most cases, permission is granted on the condition that you'll restore it to its original state when you move out. If any conditions are attached, keep written records of your communication.

Washlet Installation Steps and Costs

Installing It Yourself (DIY) If you choose a washlet model that doesn't require a licensed electrician, you can install it yourself.

Overview of Steps

1. Turn off the toilet's shutoff valve
2. Remove the current toilet seat (usually just two bolts)
3. Install a T-valve splitter on the shutoff valve
4. Secure the washlet unit to the toilet bowl
5. Connect the water hose and power cord
6. Turn the shutoff valve back on and check for leaks

Estimated costs:

• •Washlet unit: ¥15,000–50,000 (depending on features and quality)
• •Accessories like T-valve splitter: ¥2,000–5,000

Important note: If a leak occurs during installation, you may be liable for damages to the landlord or other tenants in a rental. If you're not confident, consider hiring a professional.

Hiring a Professional If you're not experienced with equipment installation or if your property has a non-standard shutoff valve, hiring a professional is a safer choice.

Estimated costs:

• •Labor: around ¥8,000–20,000 (including service call and basic labor)
• •Total with washlet unit and labor: typically ¥30,000–70,000

After installation, keep the receipt and work report as proof of the condition when you leave.

Move-Out Restoration Rules

It's Important to Keep the Original Seat If you replace the toilet seat with a washlet, don't throw away the original seat—you must keep it. You'll need to reinstall the original seat when you move out. It's common to store it in a closet or storage area in its original box.

Repair Costs for Installation-Related Damage If the installation causes damage to the toilet, walls, or floor, repair costs are your responsibility. Take photos before and after the work for protection. See [Move-Out Restoration and Security Deposit Return Guide](/column/move-out-deposit) for details on restoration standards and security deposit settlement.

Cases Where You Can Leave It Behind After long-term tenancy, you may be able to negotiate to leave the washlet in place. In this case, be sure to get written agreement.

Choosing a Property with a Washlet Already Installed

The easiest way to avoid problems is to choose a property that already has a washlet installed. When searching for properties, filter by "warm water toilet seat included" or "washlet equipped" to find pre-installed units. If you want to skip installation hassles and costs, prioritize this option.

Summary

To use a washlet in a rental, three things are essential: checking equipment during viewings, getting prior permission from building management, and preparing for restoration upon move-out. Even if you install it yourself, contacting your building management and hiring a professional minimizes the risk of water damage. Create a comfortable toilet environment and enrich your new life in your rental home.

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