Bathroom Remodel Cost Calculator

A fixture is a supply point plus a waste plus fitting labour. Moving one to a new position costs far more than replacing it in place, because the waste has to be re-run at a fall.

One fixture's whole cost — the item, the pipework to reach it, and the labour to fit it — averaged across the fixtures you are installing. A basin and a WC are cheap to move; a bath and a shower are not, and a fixture that moves more than a metre from its existing waste is a different job from one that stays put. If the layout is changing, this rate should reflect the moved fixtures rather than the ones that stay.

A small bathroom has a high ratio of wall area to floor area, which is why the cost per unit of floor area looks alarming compared with any other room.

Tile, adhesive, grout, setting out and fixing labour, priced against the tiled area above. THIS FIELD DOES NOT FOLLOW THE UNIT TOGGLE. The tiled area does — it is held in square metres and redisplayed in sq ft for an imperial visitor — but there is no dimension for a price per unit area, so this number is used exactly as typed, against an area in square metres. One square metre is 10.7639 sq ft, so a rate from a US or Canadian price book has to be MULTIPLIED by 10.7639 before it goes in this box: the 130 per m² in this page's worked figures is the same price as 12.08 per sq ft. Typing 12.08 here is accepted in silence — it is well inside the 0 to 100,000 this field allows, so nothing is clamped and no notice appears — and on the 22 m² default the tiling line comes out at 265.70 instead of 2,860. That is about 2,594 missing before contingency and about 2,983 after the 15% is added to it. The mistake only ever runs one way: an unconverted per-sq-ft rate under-states tiling to 9.29% of the real cost.

The shower enclosure and its surroundings at minimum; the whole room in a wet room. This is not optional and it is not what backer board does — it is a separate membrane or liquid system, and skipping it is the single most expensive mistake in bathroom work.

Price the sheet or the coating plus the labour to apply it, and include the corner tapes, the floor-to-wall bands and the pipe collars — joints and penetrations are where a tanking failure almost always starts, and they are the first thing a cheap price leaves out. This field is PER SQUARE METRE and does not follow the metric/imperial switch, although the tanked-area field above it does, so on an imperial page you are reading an area in one system beside a rate in the other. A per-square-foot rate is 10.7639 times smaller than the same rate per square metre: the 55 per m² used in the example here is 5.11 per-square-foot. Typing the per-square-foot figure is not refused and raises no notice, because it sits well inside the 0 to 100,000 this field accepts — it simply prices the waterproofing at 9.3% of what you meant, which on the example values takes 6.4% off the total, and 14.5% off a wet room tanked throughout. Multiply a per-square-foot rate by 10.7639 before entering it.

Ducted to outside, not into a loft. Terminating an extract in a roof space moves the moisture rather than removing it, and it is a recognised cause of condensation damage.

The items that are individually small and collectively a fifth of a bathroom: lighting and its zones, an extractor, a shaver socket, a heated towel rail and its circuit, mirrors, and the decorating. They are grouped because each one alone is not worth its own field and because leaving them out is the standard way a bathroom budget comes up short.

Twenty-five percent in an older property. Lifting a bathroom floor is how you find out the joists have been notched for the old waste run, and that is a structural repair discovered mid-job.