Guides › Bidet toilet seat installation cost
Bidet toilet seat installation cost: DIY, plumber and outlet
A bidet toilet seat costs about $170 to $650 for the seat itself, and installing it is free if you do it yourself and already have a grounded outlet next to the toilet. The extra costs come from the outlet, not the seat: a new GFCI outlet runs about $130 to $300 in the US, and a plumber or handyman to fit the seat adds labor. Fixr puts a seat installed with all the extras between $470 and $1,700. A non-electric attachment needs no outlet and costs far less to put on.
Try it: Wondering if the cheaper route is enough for you? Take the one-minute quiz, leave your email at the end, and we'll send the fit sheet for the no-plug ASSJET attachment before anything ships.
Costs vary by city, labor rates and what's already in your bathroom, and the sources below disagree at the edges. We've kept to ranges from published cost guides (Angi, Fixr and installers' own pages), read on 2026-11-10, and said where each comes from. Get a local quote before you spend. We make an attachment, not a seat, so we have no stake in which you pick, beyond the honest point that the attachment is far cheaper to install.
Bidet toilet seat installation cost at a glance
| Item | Typical cost | Source |
|---|---|---|
| The seat itself | $170 to $650 | Angi 2026 data |
| DIY install (labor) | $0, about 30 to 60 minutes | Installers' guides |
| Plumber or handyman (labor) | Roughly $100 to $250 in some guides; an Australian guide gives $300 to $600 for a seat in that market | Cost guides; vary by country |
| New GFCI outlet by the toilet | $130 to $300 (US) | Cost guides |
| Seat installed, all-in | $470 to $1,700 | Fixr |
| Non-electric attachment, DIY | $0 labor, plus the product | See bidet installation cost |
The labor numbers differ by country, so don't copy an Australian or New Zealand figure into a US budget. We use the US ranges when a US source exists and mention others only for context.
What you pay for, line by line
1. The seat
Angi's 2026 data lists the seat alone at $170 to $650. At the low end you get a warm-water seat with basic controls; at the high end, a heated seat, a dryer and a remote. A cheaper way to get a bidet is an under-seat attachment; attachment vs seat compares price, outlet, warm water, fit and what breaks.
2. The outlet
This is the one that surprises people. A seat with a heater needs power, and bathroom outlets must be GFCI-protected. If there's already a GFCI outlet within reach of the seat's cord, you don't need an electrician. If there isn't, a new one costs about $130 to $300 in the US per the cost guides. Don't run an extension cord across a bathroom; that's a safety question to put to a licensed electrician and your seat's instructions.
3. The water line
Seats connect with a T-adapter to the toilet's supply, like an attachment. Most homes need nothing more. A plumber's time goes up when the shut-off valve is stiff or corroded, the supply line is rigid, or the space behind the tank is tight. If it's a pre-war bathroom with old valves, budget for the valve to be replaced.
4. Backflow
Some places require a backflow device when a spray nozzle can sit below the bowl rim. One New Zealand guide quotes roughly $90 to $320 for that; ask a local plumber what applies to you. Our backflow preventer guide explains why, and what to check.
5. Warranty
Some manufacturers require professional installation to keep a warranty valid. Read yours before choosing DIY, and keep the receipt for whoever does it.
DIY install: what it takes
A seat mounts with a plate and two bolts, like any toilet seat. In most guides, a handy homeowner finishes in 30 to 60 minutes. The steps are: shut off the water and flush; remove the old seat; fit the mounting plate; slide the new seat on; connect the water through the T-adapter; plug in; and check for leaks with a paper towel. The attachment version of the same job is in our how to install a bidet attachment guide.
DIY is realistic if you have a GFCI outlet already, an adjustable wrench and plumber's tape, and a standard supply line. It is not realistic if the outlet is missing, the valve won't turn or you don't want to touch electricity.
When to hire someone
- No outlet nearby. Hire a licensed electrician.
- Valve won't close or leaks when touched. Call a plumber before you do any more.
- Warranty requires it. Pay the labor and keep the paperwork.
- Skirted or in-wall tank toilets. Access is hard; see skirted toilets.
- You rent. Ask your landlord first, as in bidets in an apartment.
Running costs after installation
The seat adds to your electric bill if it heats water or the seat, and to your water bill by a small amount per use. We haven't found a reliable published figure for either, so we won't make one up. If you want a number, look at the seat's rated power on its label and your own electric rate. The attachment has no electric cost at all and its water use is small. Our bidet vs toilet paper page has a payback sum you can run from your own receipts.
Seat or attachment: a cost comparison
| Bidet toilet seat | Bidet attachment | |
|---|---|---|
| Product | $170 to $650 | About $20 to $150 (see attachment cost) |
| Install | Free if DIY and outlet exists; $100+ with a plumber; $130 to $300 for a new outlet | Free DIY, 20 to 30 minutes |
| Power | Needs an outlet | None |
| Warm water | Built in | Cold, or a hot-line hookup on some models |
| Renters | Seat swap is reversible but needs an outlet | Easier to remove; see the renters' guide |
If the main reason for a seat is warm water, price in the outlet and seat together first. For many people an attachment, with a warm-water hookup if they want it, ends up thousands cheaper over the life of a bathroom. The more detailed breakdown is in bidet vs washlet.
Three example budgets
These are illustrations built from the ranges above, not quotes. Swap in your own prices.
| Situation | What you pay | Rough total |
|---|---|---|
| Outlet already beside the toilet, you install it yourself | Seat only | $170 to $650 |
| Outlet exists, you hire a handyman for an hour or less | Seat plus labor of about $100 to $250 | About $270 to $900 |
| No outlet, a plumber and an electrician | Seat, labor and a $130 to $300 outlet | About $400 to $1,200, inside Fixr's $470 to $1,700 all-in range |
The pattern: the seat is the largest cost only when the bathroom is ready for it. In an older bathroom with no outlet, the house can cost more than the product.
What the quotes often leave out
- Removing and disposing of the old seat. Usually trivial, but ask if it's included.
- A new supply line. If yours is rigid or too short, a braided one costs a few dollars and saves a return trip.
- Patching or painting if an outlet is added to a wall.
- A permit. New outlet work can need one in some places; ask the electrician.
- Return shipping. If the seat doesn't fit your bowl, a return on a bulky box can be costly. Measure first with the steps in the elongated toilet guide.
How to get a good quote
- Photograph the toilet, the wall behind it and the nearest outlet.
- Write down the seat model and whether it has a heater.
- Ask what the quote includes: labor, parts, any valve replacement and a leak test.
- Ask whether the plumber or electrician is licensed and insured for the work.
- Get two quotes. A job of under an hour shouldn't cost a half-day rate.
Where ASSJET fits
ASSJET is an attachment, so the cost of installing it is a wrench and 20 minutes. No outlet, no electrician. It isn't on sale yet. The quiz puts you on the list.
FAQ
How much does it cost to install a bidet toilet seat?
DIY costs nothing in labor if you have an outlet. With a plumber it's roughly $100 to $250 in some guides, plus $130 to $300 if you need a new GFCI outlet.
How much does a bidet toilet seat cost?
About $170 to $650 per Angi's 2026 data, with higher-end models above that.
Do I need an electrician for a bidet seat?
Only if there's no grounded GFCI outlet within reach of the cord. Ask a licensed electrician if you're unsure.
Can I install a bidet seat myself?
Many people do, in 30 to 60 minutes. Check your seat's warranty first, since some require professional installation.
Is a bidet attachment cheaper to install than a seat?
Yes. It needs no outlet and takes about 20 to 30 minutes with a wrench.
Does a bidet seat raise my bills?
It uses electricity to heat; we don't have a reliable published figure, so check its label and your rate.
Not sure which route to take? Take the quiz, or browse all our bidet guides.
Sources
- How Much Does a Bidet Cost? [2026 Data], Angi. https://www.angi.com/articles/how-much-bidet-installation-cost.htm
- How much does it cost to install a bidet?, Fixr. https://www.fixr.com/costs/bidet-installation
- How Much Does it Cost to Install a Bidet Toilet Seat?, Bidet King. https://bidetking.com/blog/how-much-does-it-cost-to-install-a-bidet-toilet-seat/
- Smart Toilet and Bidet Installation Costs in Australia, Austpek (other-country context). https://www.austpekbathrooms.com.au/blogs/toilets-and-bidets/bidet-smart-toilet-installation-cost-australia
- Smart toilet installation costs in NZ, NZ Homeware (other-country context). https://www.nzhomeware.co.nz/Blog/nz-smart-toilet-installation-costs-explained
- Google autocomplete for "bidet seat installation cost", checked 2026-11-10.