What the job involves
Replacing a toilet sounds simple, and on a straightforward like-for-like swap it often is. The plumber turns off the water to the toilet, flushes it empty, disconnects the supply and removes the old pan and cistern. They then clear the old fixings and seals, check the floor and the waste outlet, and fit the new toilet in the same position.
The job usually comes in one of two forms:
- Fit only. You buy the toilet, seat and any fittings yourself and the plumber installs them. You choose the product, but you are responsible for buying the right type and for anything missing on the day.
- Supply and fit. The plumber sources the toilet and the small parts, and installs everything. This is easier to manage and means one person is responsible if something doesn't fit. You may have less choice, or you may pay for the plumber's time collecting it.
The main types are close-coupled (cistern sits directly on the pan), back-to-wall (the pipework is hidden behind a unit or boxing), wall-hung (the pan is mounted on a frame) and concealed cistern. Close-coupled is the simplest to replace. The others involve more work and more parts. Once the new toilet is fitted, the plumber should check the flush, look for leaks, and seal the base and the back where needed.
What affects the price
No two toilet jobs are quite the same. These are the points that move the cost up or down:
- Type of toilet. A standard close-coupled toilet is the quickest to fit. Back-to-wall, wall-hung and concealed cistern toilets take longer and need more skill.
- The toilet itself. Pans and cisterns range from basic to high-end. Supply and fit prices follow the product you choose, plus the plumber's handling of it.
- Waste outlet position. If the new toilet has a different outlet (floor or wall, and the way it runs) from the old one, the plumber needs connectors or pipe changes. A like-for-like outlet is the cheapest case.
- Condition of the old installation. Corroded or seized fixings, a cracked pan collar, or old sealant and cement make removal slower. Old isolation valves that won't close can add work or call for a new valve.
- Floor condition. Water damage, soft floorboards or uneven tiles need dealing with before the new toilet goes down. That can mean more materials and more time, and sometimes another trade.
- Frame or boxing work. Wall-hung toilets need a supporting frame. Fitting one into an existing stud wall, or building a new boxed-in section, adds labour and materials. Tiling or making good afterwards is often not included.
- Pipework changes. Moving the toilet, even a short distance, means altering the waste and the water supply. That is a bigger job than a straight swap.
- Access. A tight cloakroom or a toilet in an awkward spot slows the work.
- Extras. New isolation valves, flexible hoses, a new flush mechanism, a soft-close seat and disposal of the old toilet may be itemised or bundled in.
- Location and demand. Labour rates differ across the UK, and a plumber who is busy may charge more for short-notice work. The prices on this page show what homeowners in your area actually paid.
Ways to keep the cost down
- Stick to the same type and position. A like-for-like swap is the cheapest. Moving the toilet or changing to a concealed system costs more.
- Measure before you buy. If you buy the toilet yourself, check the outlet type, the distance from the wall to the centre of the outlet, and the water inlet position. Wrong choices cause delays and returns.
- Choose a sensible product. A mid-range toilet from a known maker is easier to get parts for later. The cheapest or most unusual models can mean fiddly fitting.
- Combine jobs. If you are also replacing a basin, fitting a new vanity or having a bathroom redone, the plumber can do it all in one visit and you avoid paying a second call-out.
- Clear the space. Take out clutter, and tell the plumber about any known leaks or problems before they arrive.
- Get several quotes. Three itemised quotes for the same scope show you what is normal locally. Compare them with the prices on this page.
- Don't delay a leak. A slow leak from the base or cistern can rot the floor, and that is more expensive than the toilet.
What should be included in a quote
Ask for a written quote that covers the following:
- [ ] Whether it is supply and fit or fit only, and the make and model of the toilet if supplied
- [ ] Seat, flush fittings and any pan connector
- [ ] New isolation valve or flexible hose, if needed
- [ ] Removal and disposal of the old toilet
- [ ] Sealing and making good around the base
- [ ] Any pipework or waste changes expected
- [ ] Frame, boxing or tiling work, or a clear note that these are excluded
- [ ] What happens if the floor is damaged once the old toilet is lifted
- [ ] Whether VAT is included
- [ ] Call-out or minimum charges
- [ ] Start date, time needed and payment terms
- [ ] Guarantee on workmanship
Questions to ask a plumber
- Is the price fixed, or could it change once the old toilet is removed?
- Will you check the waste outlet and tell me if my choice of toilet won't fit?
- Do you supply the small fittings, or do I need to?
- Will the water be off for long, and can I use the other taps meanwhile?
- What do you do if the floor underneath is damaged?
- Do you take the old toilet away?
- Is the work guaranteed, and for how long?
- Are you registered with a competent person scheme or a trade body? Plumbing in general doesn't require a licence, but a reputable plumber will be happy to show you their experience and insurance.
- Will the installation comply with water regulations? Fittings and connections need to meet UK water supply rules to prevent leaks and contamination.
How long it takes and what to expect
A simple like-for-like swap is usually done in a few hours. A back-to-wall, wall-hung or concealed cistern toilet will take longer, and a job with pipework changes or a new frame may stretch into more than one visit, particularly if sealant or tiling needs to cure.
On the day, the plumber will turn the water off, remove the old toilet, and prepare the area. Expect some mess, and possibly water left in the pan and trap. They will fit the new toilet, reconnect the water, and test the flush several times, checking every joint for drips. You should be able to use the toilet fairly soon after, though sealant should be left to set. Ask whether to wait before using it.
If the old toilet was fixed down with cement or the floor is uneven, the plumber may need extra time. If a problem emerges, ask them to explain it and to confirm any additional cost before they carry on.
Signs a quote is too cheap or too expensive
Possibly too cheap:
- It gives no detail about what is included, such as seat, fittings, disposal or sealing.
- There is no mention of the toilet model, or a vague promise of "a toilet".
- The plumber won't give anything in writing.
- It is far below the other quotes and the prices on this page, with no explanation.
- They suggest skipping isolation valves or reusing worn flexible hoses.
- They ask for full payment before they start.
Possibly too expensive:
- A simple like-for-like swap is priced like a bathroom refit.
- Large allowances for "unforeseen problems" are included without any explanation.
- The toilet is supplied at a heavy mark-up compared with the same model in shops.
- Extras you didn't ask for are bundled into a package.
- The quote doesn't break down labour and materials.
A fair quote is clear about scope, names the products, and explains anything unusual. If two quotes are far apart, ask each plumber what they have allowed for. The difference is usually in the scope, not the skill.