The bands, as a rough guide
These are broad planning bands for bathrooms in Kellyville and the surrounding Hills estates in 2026. They are deliberately wide. They are not a quote, and your room may land outside them.
A partial upgrade or a powder room — from around $10,000. New tapware, lighting, mirror and screen in a sound room, or a toilet-and-basin powder room with minimal waterproofing and no shower.
A full renovation of a standard ensuite or main bathroom — roughly $15,000 to $35,000. Taken back to frame, new waterproofing, tiling and fit-off, with the plumbing kept where it is. Ensuites tend to sit toward the lower half, larger main bathrooms with a shower and bath toward the upper half.
A larger or reconfigured bathroom, or two rooms together — from around $35,000. A big main bathroom with a high specification, a layout change that moves drainage, or a main bathroom and ensuite done in one program. Relocating wastes on a slab can take a job well past this.
A main bathroom quoted well below the middle band is usually leaving something out — most often the waterproofing being patched rather than replaced, tiling stopping at two metres, or a vanity chosen for price rather than for the space.
What sits inside the number
A full renovation is roughly a third labour, a third materials and fittings, and a third the trades that do not produce anything visible — the strip-out, the waste removal, the plumbing rough-in, the electrical, the waterproofing and the compliance.
That last third is the part people mentally discount and the part that determines whether the room is still sound in fifteen years.
The things that move the number
Moving a waste. More than any other decision, this is what pushes a job up a band. Cutting the slab to relocate a toilet or shower waste adds a jackhammer stage, dust containment through the house, extra program days, re-pouring and re-levelling. In a Hills project home it is almost never worth it — the process page explains why the productive brief works within the existing plumbing.
Tile format. A 600×600 rectified tile laid on a straight set is the simplest format to lay. Mosaics, herringbone, 100×300 subway with a stacked bond, and anything needing mitred external corners all multiply labour. Choose format before you choose colour.
Room size. Obvious but underweighted. A large main bathroom costs meaningfully more than a compact ensuite, because every line item scales with area.
Specification. Wall-hung toilets, in-wall cisterns, heated towel rails, underfloor heating and custom joinery each add cost and each add a little program time. Decide them before the quote, not at fit-off.
The floor underneath. An upstairs room on a timber floor usually needs levelling and sometimes new sheeting. It also makes a layout change more affordable than it would be on the slab.
What does not move it much
Tapware brand, within reason. The gap between a decent mid-range mixer and a premium one is small in the context of the whole job — and the cheap end fails early enough that the saving disappears.
Vanity style. A wall-hung drawer unit is not materially dearer than a floor-standing cupboard of the same width.
Full-height tiling. Taking tile from two metres to the ceiling adds perhaps a square metre and a half per wall. It is one of the cheaper changes on the list and one of the most visible.
What the Hills stock specifically means for price
Kellyville, Rouse Hill, Beaumont Hills and Glenwood housing is post-asbestos. That removes the single largest source of mid-job variations, because there is no sheeting to test, no licensed removal stage and no air clearance.
It also means the construction is predictable. A project-home bathroom built in 1998 or 2008 is built the way thousands of others were, so what is behind the tiles is rarely a surprise. That is why a fixed price on this stock tends to stay fixed.
The deposit rule
Under the NSW Home Building Act, the deposit on a residential building contract is capped at 10 per cent. Progress payments should run against completed stages, not a calendar.
That is worth knowing before you compare quotes. A quote that requires a third of the value up front is not a better price, it is a worse risk.
Every job is different — get a proper quote
The bands above are only a starting point. Two bathrooms of the same size can differ widely once the construction, the waste positions, the tile, the fittings and the household's brief are known — which is why nobody can give you an accurate price from a web page, and why we do not try.
A proper on-site quote is the only way to get a customised price. A measure resolves the room size, the construction, whether it is slab or timber floor, where the wastes sit and what you actually need, and from that we give you a fixed, written figure rather than a band.
Call 02 5944 1412 or book a measure and quote.
The rest of the detail
Questions people ask before they commit
Why is there a range rather than a price?
Because room size, tile selection and whether the layout moves each shift the number by thousands. The bands below are a rough guide only; an on-site measure is what turns a band into a fixed figure for your room.
What is the single biggest cost driver?
Moving a waste. Most other decisions move the price far less. Cutting the slab to relocate a toilet or shower adds a jackhammer stage, dust containment, extra program days and re-pouring, and it rarely returns what it costs.
Are tiles really that expensive?
The tiles themselves are less than people think. Laying them is where the money goes — small format, mosaics, herringbone and anything requiring mitred external corners all add labour, and labour is the larger half of a tiling line.
Do I pay a deposit?
Yes, and under the NSW Home Building Act the deposit on a residential building contract is capped at 10 per cent. Anyone asking for thirty per cent up front is outside the law and that should end the conversation.
Is doing two bathrooms cheaper than doing two separately?
Per room, yes. Site set-up, the skip, waterproofer attendance and tile delivery are largely fixed, so the second room carries less overhead. The limit is practical rather than financial: the household still needs somewhere to shower.