Converting a squat toilet to a sitting one: what the job really involves

The short answer: a proper squat-to-sitting conversion in a typical Serdang-belt terrace house costs RM 3–8k and takes about a week — because it is a floor job, not a bowl swap. The squat pan sits recessed inside a raised concrete plinth, and that plinth has to be demolished and the floor rebuilt before a sitting bowl can go in properly. If someone quotes a few hundred ringgit for a “conversion”, you are getting a sit-on converter frame or a bowl perched on top of the old platform — sometimes a reasonable stopgap, but not a conversion.

It is one of the most common requests we get in older houses around Serdang, Seri Kembangan and Kajang, usually for the same reason: knees. Squatting gets harder with age, and after a knee replacement or a stroke it becomes impossible. If the change is for an elderly parent, it is worth reading this alongside our elderly bathroom page, because a conversion is the natural moment to add grab bars and a seated shower in the same job.

Why it is a floor job

• The pan sits inside a raised plinth. In most pre-2000s houses the squat pan is cast into a concrete platform 10–20 cm above the rest of the floor. Remove the pan and you are left with the platform, not a flat floor.
• The outlet is in the wrong place. A squat pan discharges straight down through the middle of its plinth. A sitting bowl needs its 4-inch outlet at a set distance from the finished wall — roughly 25–30 cm for most bowls sold here — and the two almost never line up. The soil pipe has to be adapted or relocated, which is the single biggest variable in the price.
• Demolition kills the waterproofing. Hacking out the plinth tears open the floor membrane around it. Once that happens the floor must be re-screeded with proper falls, re-waterproofed and flood-tested — skip this in an upstairs bathroom and the downstairs ceiling pays for it within months.

Your real options

The week, day by day

1. Day 1: strip out, demolish the plinth, expose the soil pipe.
2. Day 2: plumbing — adapt or relocate the outlet, then re-screed the floor with falls towards the drain.
3. Day 3: waterproofing membrane across the floor and up the walls.
4. Day 4: the ponding test — the floor is flooded and left for 24 hours. This is the day impatient contractors skip; it is also the only proof the membrane works.
5. Days 5–7: tiling, install the bowl and fittings, seal and hand over.

What moves the price within RM 3–8k

Ground floor is cheaper than upstairs (the slab and the ceiling below complicate pipe work). A soil pipe that only needs an offset connector is cheaper than one that must be rerouted. And how much of the room gets retiled matters — matching 20-year-old tiles is usually impossible, so most people retile the floor and the lower walls at minimum. Whatever you decide, add grab bars beside the new bowl while the wall is already open; drilling finished tiles later costs more and looks worse. Our price guide shows where a conversion sits among the other bathroom works.