How to Decorate a Bathroom: A Practical Guide for Australian Homeowners
Most bathroom decorating decisions get made in the wrong order. Finish choices locked in before anyone has checked the substrate. Tile specs confirmed before the waterproofing scope is understood. Then the renovation starts and the picture changes.
This guide covers the decisions that are genuinely yours to make: colour, tile format, materials, fixtures, finishes. The things that shape what a bathroom looks like and what it costs to build.
It doesn’t cover the structural, wet area, and compliance work — the licensed trade scope — that sits underneath those choices. That’s addressed separately below, because it matters more than the tile selection.
Lifestyle Bathrooms is a referral and connector service, not a licensed contractor. This guide is information only.
Decoration and Renovation Are Not the Same Thing
Decoration is the set of decisions you make. The tile you choose. The grout colour. The tapware finish, the vanity style, the mirror size, the paint. These are specification decisions — and they’re yours to drive.
Renovation is what a licensed specialist does with those decisions. Demolition, substrate preparation, waterproofing membrane installation, plumbing rough-in and fit-off, electrical work, tiling installation. None of that is decoration. All of it requires the right licence.
The reason this distinction matters practically: the two things are more connected than they look. Pick a 600×1200mm rectified porcelain tile and you’ve just made a decision that affects the waterproofing membrane specification, the substrate tolerance requirements, the adhesive coverage standard, and the installation labour cost. The decoration choice and the compliance requirement don’t sit in separate boxes — each one shapes the other.
What this means for how you approach the planning process: get the licensed scope confirmed early. Not after you’ve ordered tiles. The specification decisions in the rest of this guide are worth making carefully. But they land on top of a compliance foundation, and that foundation needs to be established first.
Related: NSW Fair Trading licensing requirements for bathroom renovation contractors — what applies to your project. See our NSW Fair Trading licensing guide ›
The Substrate and Waterproofing Check That Comes Before Any Design Decision
A significant number of bathroom renovation projects in existing homes turn up substrate damage, failed waterproofing, or moisture penetration once the tiles come off. The bathroom looked fine from the outside. The problems were sitting behind the wall. Specification decisions made before that inspection are sometimes worth nothing — the scope changes once the real picture is known.
Substrate condition
Existing substrate in older Australian bathrooms is typically FC sheet (fibre cement), compressed fibre cement, or in some cases tile installed over tile. The substrate condition needs to be assessed before any new finish spec is committed to. Delaminated, wet, or soft substrate has to be replaced. That changes the timeline and the cost envelope — and it’s better to know that at the quote stage than after the job has started.
Waterproofing status
Wet areas in Australian homes must comply with AS 3740 — Waterproofing of Wet Areas Within Residential Buildings. In homes built before the mid-1990s, waterproofing membranes are frequently at or past the end of their service life. If there’s a waterproofing failure in the existing installation, the starting point is rectification. Not tile selection.
The compliance sequence
Under the NCC and AS 3740, wet area waterproofing must be installed by a licensed waterproofer and inspected before tiling proceeds. A certificate of compliance gets issued at that inspection. No decoration decision changes that sequence. The inspection isn’t optional and it can’t be folded into the tile installation to save time. If a quote doesn’t include the waterproofing certificate, ask why before signing anything.
The practical takeaway
If the bathroom you’re renovating is in an existing home built before 1995, include a substrate and waterproofing assessment in the initial quote conversation. Do it before the tile samples come out. The decoration decisions below are worth making carefully — once you know what you’re working with.
Related: Waterproofing compliance for wet areas under AS 3740 — what the standard requires and what a certificate of compliance covers. See our AS 3740 waterproofing guide ›
Bathroom Colour Schemes, Tile Ideas, and Material Choices — and What They Actually Cost
The six categories below cover the decoration decisions that come up in most renovation briefs. Each one carries a cost implication, a compliance implication, or both. The point here isn’t to narrow your choices — it’s to make sure the choices you make are ones you’ve thought through.
Light tones — white, off-white, warm grey, pale sage — read as spatially larger in compact bathrooms. That’s not a style preference; it’s a well-documented perceptual effect. It’s worth knowing in a market where most pre-1990 homes have bathrooms under 7m².
Matte finishes on walls and floors cut glare in well-lit rooms. The trade-off is maintenance: matte surfaces show water spots and cleaning marks more readily than gloss. Choose based on how the bathroom gets used, not just how it looks in a showroom.
Paint in wet areas must be moisture-resistant and specified for bathroom use. Standard interior paint isn’t rated for a wet area environment and will fail — typically within two or three years. Put bathroom-grade paint in the brief explicitly. Don’t assume it’s included.
Large-format tiles — 600×600mm and above — produce fewer grout lines and photograph well. They also require a flatter, better-prepared substrate, stricter adhesive coverage standards under AS 3958.1, and back-buttering during installation. If the substrate can’t accommodate them without significant prep work, the installation cost goes up.
Small-format tiles — mosaics, 100×100mm, penny rounds — are more forgiving on uneven surfaces and easier to lay around curves. The trade-off is grout density: more joints mean more maintenance, and precision grout work takes time.
Rectified tiles have precision-cut edges and allow tighter grout joints (≥2mm). Non-rectified tiles need wider joints to accommodate the variation in edge dimensions. This is a specification point, not an aesthetic one — it affects installation standard and labour.
Porcelain is the standard material for most Australian bathroom projects. Low porosity, hard-wearing, available across a wide format and finish range. The cost varies considerably by format and surface treatment, but the base material performs well in domestic wet areas without special maintenance requirements.
Natural stone — marble, travertine, limestone — is a different proposition. It needs sealing on installation, periodic re-sealing, and careful specification for floor use because slip resistance varies by finish and stone type. If low-maintenance is a priority, stone isn’t the right call.
Ceramic wall tiles work well in lower-exposure wall applications where they won’t see floor traffic or direct water in a shower recess. They’re cost-effective. They’re not rated for floor use in wet areas — the slip resistance and porosity requirements rule them out.
Tapware finish — chrome, brushed nickel, matte black, brushed brass — doesn’t affect plumbing cost. It affects what you pay for the fitting and how long the finish holds. Matte black coatings vary significantly between brands. Ask specifically about PVD (Physical Vapour Deposition) finish versus painted coating. The price difference is real, and so is the durability difference.
WELS water efficiency ratings apply to replaced fixtures under some renovation contracts. Confirm the minimum rating required with your plumber before selecting fittings.
Vanity selection can affect plumbing rough-in position if the waste outlet or supply point moves. Get the rough-in dimensions confirmed with the plumber before ordering a vanity. Changing them after rough-in is done costs time and money.
Bathroom lighting installation is licensed electrical trade work. The specification decision — colour temperature, fitting type, number of fittings, placement — is yours. The installation is your electrician’s.
Warm white at 2700–3000K is standard for general bathroom lighting. Cooler white at 4000K+ works better for task lighting at a mirror. A well-specified bathroom usually uses both. Getting the lighting spec wrong is cheaper to fix on paper than on site.
IP ratings for fittings in bathroom zones are a compliance requirement under AS/NZS 3000, not a preference. Fittings in Zone 1 (directly above the bath or shower) need to be rated for that proximity to water. Your electrician will advise on zone classification — include it in the brief conversation.
Grout colour does more work than most people expect. Dark grout on light tile creates a strong, visible grid. Light grout on light tile produces a quieter, more continuous surface. Neither is correct — they produce different results, and it’s worth deciding deliberately rather than by default.
Movement joints at internal corners must be filled with silicone, not grout. That’s a requirement under AS 3958.1, not an optional finish. Grout at internal corners cracks under normal building movement — it’s not the installer cutting corners, it’s physics. If a quote doesn’t include silicone at corners, ask about it before work starts.
Epoxy grout outperforms cement grout on durability and stain resistance. It’s harder to install and more expensive in labour. For a shower recess, it’s the right call. For a dry wall area well away from water, standard cement grout is adequate.
Every decision above has a price tag attached to it. That price changes significantly depending on format, finish, and brand. The next section covers what those choices typically cost — as directional estimates, not quotes.
How Your Bathroom Decorating Decisions Affect the Final Quote
The finish and material choices made during the decoration stage are among the largest variables in a renovation quote. Two bathrooms with an identical footprint — same size, same layout, same trade scope — can land $8,000 to $15,000 apart depending on the specification. That gap is almost entirely driven by the decisions below.
All figures are directional industry estimates, not quotes. Current market pricing varies by supplier, location, and availability. Confirm actual costs with your contractor and supplier before committing to a spec.
Tile supply
Standard 300×600mm porcelain wall tile: approximately $30–$60 per m² supply. Large-format 600×1200mm rectified porcelain: $80–$180 per m² supply. Natural stone: $120–$400 per m² supply. For a typical 5–8m² full bathroom, the difference between a standard and stone tile spec adds $1,000–$3,500 to supply costs alone, before installation is factored in.
Tile installation labour
Large-format tiles take meaningfully longer to install than standard format. The back-buttering requirement under AS 3958.1 adds time per tile. In practice, expect large-format installation to carry a 20–35% labour premium over standard format tiling. That’s not negotiable — it’s what the installation standard requires.
Tapware and fixtures
Entry-level tapware set (basin, shower, bath): $400–$900 supply. Mid-range: $900–$2,500. Premium brands — Brodware, Astra Walker, Vola — run from $3,000 to $8,000 and above. These are supply-only figures. Installation labour is separate and consistent across price points, because the plumbing work is the same regardless of what you paid for the fitting.
Vanity
Standard flatpack or freestanding vanity: $400–$1,200. Semi-custom wall-hung with stone top: $1,800–$4,000. Custom joinery: $4,000–$10,000 and above. Directional estimates. The gap between a standard and a custom vanity is real — and in most rental properties or mid-range owner-occupier renovations, it doesn’t return its cost.
Lighting
A standard bathroom downlight package covering 3–5 fittings typically runs $600–$1,200 for supply and installation. Heated towel rails, feature pendant lighting over a bath, or a heated floor add to the electrical scope and the cost accordingly.
Substrate — the cost driver that sits outside the decoration spec
If demolition reveals substrate damage or failed waterproofing in an existing bathroom, that becomes part of the scope regardless of the decoration plan. Substrate preparation adds $800–$3,500 to most full gut-and-rebuild projects depending on what’s found. It doesn’t change the tile decision, but it does change the final number on the quote.
A renovation quote built around a confirmed specification is a more accurate quote than one built around a vague brief. Getting the decoration decisions made and documented before the quote goes out reduces the gap between the number you sign and the number you pay.
Related: Full cost breakdown for bathroom renovations in Australia — what each trade line should include and how to read a quote. See our bathroom renovation cost guide ›
Decorating a Small Bathroom: What Works and What Doesn’t
Most Australian bathrooms from 1950s–1990s housing stock are compact — 4 to 7m² is the common range. The constraints are real. A 14m² ensuite and a 5m² bathroom don’t respond to the same decisions. Some approaches that look good in showrooms at scale make a small bathroom feel more enclosed, not less.
Tile format
The advice that small tiles suit small rooms doesn’t have much to back it up. A mosaic wall creates a high density of grout lines — which can read as busier and noisier than a larger format in a confined space. Large-format tiles can work in a small bathroom if the substrate tolerates them and the layout is planned carefully to manage cuts at the perimeter. The more useful question is about tonal consistency, not format size.
Colour
A consistent light palette across floor, walls, and ceiling reduces the number of visual interruptions and makes the room read as larger. The effect is stronger when the grout colour is close to the tile colour. Using the same tile on the floor and walls is one of the more reliable ways to achieve spatial continuity in a compact bathroom — it removes the line where two different surfaces meet.
Mirrors and lighting
A full-width mirror above the vanity is the single most effective tool for increasing the apparent size of a small bathroom. It doubles the perceived depth of the space and reflects light back into the room. If the mirror is large, factor reflected glare into the lighting specification — a bright fitting directly above a wide mirror creates contrast that can be uncomfortable.
Niches and storage
Recessed niches — tiled shower niches, recessed toilet roll holders — eliminate the visual projection of shelf brackets and reduce clutter in tight spaces. They require planning before waterproofing proceeds. A niche framed after the membrane has been applied compromises the waterproofing at the penetration point. Put them in the brief before the waterproofer is booked, not after.
Fixture scale
Wall-hung vanities expose the floor beneath them. In a small bathroom, visible floor reads as more space. A floor-standing cabinet over the same footprint closes off that visual gap. Wall-hung fixtures require wall blocking during the framing stage of the rough-in. Specify it before the plumber is on site — it can’t be added cleanly after the fact.
Ventilation
Compact, poorly ventilated bathrooms develop mould on grout and silicone faster than larger, well-ventilated spaces. The exhaust fan is part of the electrical scope. Don’t undersize it on the basis that the bathroom is small. A small room with inadequate ventilation is a bigger problem, not a smaller one.
The constraints of a small bathroom resolve best at the specification stage — before the trades are booked, not while they’re on site.
Bathroom Makeover on a Budget: Where the Money Goes Further
A bathroom renovation on a tighter budget means making deliberate decisions about where to spend and where to pull back. It doesn’t mean skipping the compliance work. Cutting the waterproofing membrane to save money, or using an unlicensed contractor to reduce labour cost, creates a liability that sits with you — not the contractor — for years after the job is done.
The split below reflects where specification quality has real consequences and where cost savings are achievable without affecting the outcome.
The left column is largely trade and compliance cost — it doesn’t move easily without creating risk that sits with the homeowner after the contractor leaves. The right column represents real savings on specification choices where the outcome is comparable. A realistic budget identifies both clearly before the quote goes out.
Common Questions About Decorating a Bathroom
In some cases, yes — but with conditions that matter. The existing substrate and tile installation both need to be structurally sound. The added tile height can’t create a trip hazard at doorways or conflict with fixture heights. The additional weight load needs to be within what the substrate can carry.
The bigger issue is waterproofing. If the existing membrane has failed — or if there’s any uncertainty about its condition — tiling over the existing surface conceals the problem rather than resolving it. A failed membrane behind new tiles is still a failed membrane. The difference is that it’s now harder to get to.
Before specifying tile-over-tile, have a licensed waterproofer assess the existing installation. If the assessment comes back clear, the approach may be viable. If it doesn’t, rectification has to come first. The apparent saving from skipping that step tends to come back at a higher cost later.
Tonal consistency between floor and wall tiles is more effective than any specific colour. Light, neutral tones — white, pale grey, warm off-white — in a consistent palette reduce the number of visual breaks across surfaces. The grout colour matters as much as the tile: a light grout on light tile produces a quiet, continuous surface. Dark grout introduces a visible grid that can make a compact space feel busier.
The advice to match floor and wall tiles in a small bathroom is sound. It removes the horizontal line where two different surfaces meet, which is one of the stronger visual cues that a space is small.
Most internal bathroom renovations — replacing fixtures, re-tiling, updating fittings within the existing footprint — don’t require a development application under standard exempt development provisions. Work that changes the building footprint, moves structural elements, or involves adding a new wet area where one didn’t previously exist may require approval.
In NSW, the relevant reference is the State Environmental Planning Policy (Exempt and Complying Development Codes) 2008. Don’t assume the work is exempt without checking. Your licensed contractor should advise on this as part of the initial scope conversation — it’s a question worth raising before plans are finalised, not after.
A standard full gut-and-rebuild in an existing home typically runs two to four weeks of active on-site work. That’s trade time on site — it doesn’t include the lead time before work starts.
In most Australian markets, trade scheduling runs 4–8 weeks from quote acceptance to start date. Regional areas can run longer depending on trade availability. The decoration and specification decisions — tiles, tapware, vanity, fixtures — should be finalised and orders confirmed before trade bookings are locked in. Long-lead items, particularly imported tapware or custom joinery, should be ordered before work starts. Waiting until the bathroom is demolished before ordering a 10-week lead time vanity is one of the more common causes of project extension.
In NSW, any residential building work valued above $5,000 — including labour and materials — must be carried out by a NSW Fair Trading-licensed contractor. A full bathroom renovation almost always exceeds that threshold, often by a wide margin.
The licence class needs to match the work. A plumbing licence covers plumbing. It doesn’t cover waterproofing, structural work, or tiling. Carrying out licensed work without the appropriate licence is illegal. It also voids the statutory warranty that would otherwise apply under the Home Building Act 1989, and it can affect home insurance claims that relate to the work.
The question worth asking isn’t “what can I do myself?” — it’s “what licence class does my contractor hold, and does it cover everything in the scope?” A contractor who hedges on that question is worth pressing before you sign a contract.
Ready to Move From Planning to a Quote?
You’ve done the planning work. You know the spec you want, or at least the direction you’re heading. The next step is a conversation with a licensed specialist who can confirm scope, flag any substrate or compliance issues, and put together an itemised quote. No travelling salesperson. No obligation. Just a direct conversation about your bathroom and what a realistic quote should cover.
A specialist closest to your location will be in touch within 48 hours of a submitted request.
Lifestyle Bathrooms is a referral and connector service, not a licenced contractor. We connect homeowners across Australia with vetted, licenced bathroom renovation specialists.