Bathroom Renovations Across Hornsby Shire

The bathroom most Hornsby houses are still living with

Walk the streets between Hornsby station and the national park edges and the houses tell you their decade before you knock. Red and cream brick from the fifties. Weatherboard cottages with fibro additions on the back. Seventies split-levels stepping down the slope with the garage underneath and the bathroom on the half-landing.

Many of those houses have had a kitchen done, often more than once. The bathroom tends to be the room that got skipped. It still has the pastel wall tiles, the cast-iron bath boxed in with a tiled hob, a shower over the bath with a curtain rail, and a small window that fogs over every morning.

It is also usually the room with the least forgiving construction. Before membranes became standard practice, wet-area floors were tiles laid on a thick sand-and-cement bed, and walls were either rendered brick or fibro sheet. Water that got past the grout went into the frame, the joists or the brickwork below, quietly, for decades.

That is why an older-home renovation here is really two jobs. One is taking out what the fifties and sixties put in, safely and without surprises. The other is building a room that copes with a wet, shaded, bush-edge climate for the next thirty years.

What changes at the measure

A measure in Hornsby Shire takes longer than one in a new estate, because there is more to look at.

• Where the floor sits. Timber floor on bearers, a slab over the garage, or a mortar bed on sheeting. Each one changes the falls, the waterproofing detail and what a layout change costs.
• What the walls are made of. Fibro in the wet area means an asbestos test before anyone lifts a hammer.
• The plumbing era. Galvanised supply pipes and cast-iron or earthenware waste lines are common in houses of this age and are usually replaced while the walls are open.
• The exhaust. Plenty of bathrooms here have no fan, or a fan that blows into the roof space, which moves the damp problem rather than solving it.
• How the materials get in. A steep driveway, a long set of front steps or a unit with a small lift changes the labour in a way that belongs in the quote.

All of that goes into a written, itemised price. The point is to have the likely surprises named on paper before the start date, not raised as variations once the old tiles are in the skip.

Damp, shade and tree canopy

Suburbs like Asquith, Berowra and the bush-facing streets of Pennant Hills and Normanhurst are beautiful precisely because the trees come right up to the house. The same canopy means the bathroom window may not see direct sun for most of the year.

A room like that stays wet. Mould returns to the ceiling a fortnight after it is cleaned, and painted surfaces peel at the cornice. The fix is not a stronger cleaning product. It is a correctly sized exhaust fan ducted to the outside, a ceiling paint rated for wet areas, a run-on timer so the fan keeps going after the shower stops, and tile and grout choices that do not hold moisture.

Those items cost relatively little during a renovation and make more difference to how the room lives than almost anything else in the budget. See waterproofing for how the membrane side is handled.

Houses, split-levels and units

Freestanding older homes are where most of the work is. Main bathrooms in these houses were built for a family of five sharing one room, and many owners now want a walk-in shower, better storage and a second toilet somewhere nearby. Our complete bathroom renovations page covers how that is approached.

Split-levels from the late sixties and seventies often put the bathroom over the garage or on a half-floor. Access for plumbing is sometimes easier than people expect, because the drainage can run through the garage ceiling. Sometimes it is harder, because the slab is suspended.

Units near Hornsby and Waitara stations range from brick walk-ups to much newer towers. They bring strata approval, building rules about working hours and lift bookings, and less room for error on waterproofing because a leak lands on a neighbour. Small bathroom renovations explains what works in those rooms.

Approvals, in plain terms

A bathroom renovated inside its existing walls is generally exempt development in NSW, provided the house is not a heritage item and no structural change is involved. Hornsby Shire does have heritage items and conservation areas, and parts of the Shire are mapped as bushfire-prone land, so it is worth confirming both before the design is settled.

Strata units are a separate question. Replacing a bathroom membrane in a strata building normally needs owners corporation approval, and that process can take a couple of months. It is better started early.

What we cover and where

Seven kinds of wet-area work: complete bathrooms, ensuites and powder rooms, small bathrooms, laundries, waterproofing, tiling and vanities and storage.

Across Hornsby, Waitara, Asquith, Normanhurst, Pennant Hills and Berowra, plus Thornleigh, Westleigh, Hornsby Heights, Mount Colah, Mount Kuring-gai and Wahroonga.

Who does the work

Renovation work is carried out in partnership with Coastal Renovation Group, a licensed NSW builder. Licence and insurance details are provided on request — ask on the phone, at the measure or any time after, and check them on the public register yourself.

This website is not a builder and does not hold a licence of its own. It also does not display reviews, because it is new and has none to show. The quote and the questions asked at the measure are the fairest things to judge it by.

The 2026 cost guide has the numbers. When you are ready, call 02 5926 2135 or send the room details through.