Most bathrooms out here are twenty to thirty years old, not seventy. Nothing is rotting behind the wall — the room has simply aged, and the original fit-out was never meant to last this long.
Seven jobs, all of them wet areas. No kitchens, no extensions, no whole-of-house work.
These are young houses with old bathrooms
The Hills grew through the 1990s and 2000s, and North Kellyville, Rouse Hill and Beaumont Hills later again. That makes this an unusual renovation market, and it changes almost every assumption people carry over from renovating an older house.
Nothing is hiding behind the wall. No asbestos, because the housing postdates it. No cast-iron waste at the end of its life. No framing quietly absorbing shower water since 1968. Waterproofing that was done to a modern standard rather than not at all.
The practical effect is that these jobs are predictable. The variation clause exists and occasionally gets used, but it is not the dominant risk it is in post-war stock. A fixed price here is much more likely to stay fixed.
What has aged is the fit-out. A bathroom built in 2001 was fitted with what the project builder bought in volume: a corner shower with a framed screen, a vanity with doors rather than drawers, wall tiles to about two metres with a painted strip above, a spa bath nobody has filled since 2009, and a single downlight in the ceiling.
None of that has failed. All of it dates the room, and most of it can be replaced without touching a pipe.
The slab is the constraint
Project homes out here are built on slab-on-ground. That single fact should shape your whole brief.
Moving a toilet or a shower waste means cutting concrete or building the floor up to create new fall. Both are genuinely expensive and neither is the best use of the budget in a house where the layout was competently planned in the first place.
So the productive question is not "how do we rearrange this room" but "what can we change without moving a waste" — and the honest answer is: nearly everything you actually notice.
The corner shower becomes a walk-in with a fixed panel, usually on the existing waste
The spa bath becomes a freestanding or built-in bath, or disappears entirely
Wall tiles go full height, which removes the paint line that dates the room more than anything else
Lighting moves to the mirror instead of the ceiling behind you
The framed screen becomes frameless or semi-frameless
That list is most of what makes a 2001 bathroom read as 2001, and none of it requires a plumber to touch the slab.
More than one wet area
Hills houses commonly have a main bathroom, an ensuite and a powder room — sometimes a fourth upstairs. That changes the economics in your favour.
Trade attendance, the skip, the waterproofer's set-up and the tile delivery are largely fixed costs. They do not double when the second room is added. If both the main bathroom and the ensuite are on the list, pricing them together is the single best-value decision available.
The trade-off is practical rather than financial: losing two of your three bathrooms at once is manageable, losing two of two is not.
What a fixed price should mean
Because these jobs are predictable, there is less excuse for vagueness. A quote for a Hills bathroom should name the fittings by brand and model, state the tile allowance per square metre, include the skip and the making good, show the waterproofing cure time as its own line in the program, and set out how a variation would be priced if one arises.
If a quote is vague on a house where the unknowns are genuinely small, that vagueness is a choice rather than a necessity.
Renovation work arranged here is carried out in partnership with Coastal Renovation Group Pty Ltd, ABN 83 693 405 579, holder of NSW contractor licence 493393C, Class: Builder, current to 24 March 2029.
That number is on the public register. Search it, confirm the class and the expiry, and check whether there is any disciplinary record. It takes half a minute.
We will not tell you this website holds a licence, because it does not. We will not show you reviews we have not received or a rating we have not earned. This is a new site, and inventing social proof would be a poor way to start a conversation about thirty thousand dollars.
What does a bathroom renovation cost in Kellyville?
As a 2026 planning guide, a main bathroom taken back to frame and refitted runs about $24,000 to $36,000, an ensuite $16,000 to $28,000, and a powder room $8,000 to $15,000. Houses out here tend to have more than one wet area, and doing two together is meaningfully cheaper per room.
Is asbestos a concern in Hills houses?
Rarely. Most of the housing across Kellyville, Beaumont Hills, Rouse Hill and North Kellyville was built from the 1990s onward, which is after asbestos cement went out of use. That removes the single biggest source of variation risk and makes these jobs far more predictable than older stock.
Can the layout change?
It can, but it is expensive. Project homes out here sit on slab-on-ground, so relocating a waste means cutting concrete or building the floor up to create new fall. In almost every case the better return is to keep the waste positions and spend the money on the room instead.
Who actually does the work?
Renovation work is carried out in partnership with Coastal Renovation Group Pty Ltd, holder of NSW contractor licence 493393C, Class: Builder. The number is in the footer and on the public register — check it before anything starts.
