Key Takeaways
Bathroom renovations commonly range from $12,000 to $35,000+ depending on size, waterproofing, fixtures, tiling, and layout changes.
Waterproofing, tiling, plumbing, fixtures, demolition, and labour are major pricing drivers.
Moving plumbing fixtures usually increases the quote significantly.
Check that waterproofing, certification, rubbish removal, and fixtures are clearly included.
Overview
Bathroom renovation costs are strongly affected by waterproofing, plumbing layout, tiling choices, fixtures, demolition, access, and whether the existing layout is retained.
1. Typical Bathroom Renovation Costs
Bathroom renovation costs usually depend on the size of the room, fixture quality, tiling coverage, waterproofing requirements, plumbing changes, demolition, access, and finish level. Use these ranges as a practical starting point before comparing quotes.
Basic
$12,000 – $18,000
Small bathroom, standard fixtures, simple layout, basic tiles, and minimal changes.
Standard
$18,000 – $28,000
Mid-range fittings, quality tiling, vanity upgrade, shower screen, and normal trade work.
Premium
$28,000 – $35,000+
Premium tiles, custom vanity, layout changes, high-end fixtures, and detailed finishes.
2. What Affects the Cost?
The biggest cost movements usually come from waterproofing quality, tile selection, plumbing relocation, fixture upgrades, demolition complexity, trade availability, and how much preparation work is required before the visible finishes go in.
Waterproofing
Waterproofing quality and compliance are critical and should be clearly included in the quote.
Tiling
Tile size, pattern, height, wall coverage, and labour complexity can change the price.
Plumbing
Relocating toilets, showers, baths, or vanities usually adds labour and material costs.
Fixtures
Tapware, toilets, vanities, mirrors, baths, and shower screens vary widely in price.
3. Cost Breakdown
A bathroom quote is usually split across tiling, plumbing, fixtures, waterproofing, labour, demolition, and finishing work. The exact split can change depending on layout complexity, compliance requirements, and the level of finish selected.
Total
$22,000
Tiling
$6,500
30%
Plumbing
$4,500
20%
Fixtures
$4,000
18%
Waterproofing
$2,500
12%
Labour & Demolition
$4,500
20%
5. Cost Saving Tips
A cheaper bathroom renovation does not always mean choosing the lowest quote. The safest savings usually come from keeping the scope clear, avoiding unnecessary layout changes, and choosing finishes that look good without creating extra labour.
Keep the existing toilet, shower, bath, and vanity positions where possible to reduce plumbing relocation costs.
Choose tile sizes and patterns that look clean but do not require excessive cutting, complex laying, or full-height wall coverage everywhere.
Use mid-range fixtures with clear warranties instead of overspending on premium tapware, toilets, vanities, or accessories that may not improve resale value.
Confirm demolition, rubbish removal, waterproofing, certification, and final clean-up are included before comparing quotes.
Avoid making design changes after waterproofing, tiling, or fixture installation has started, because late changes can trigger expensive variations.
6. Waterproofing, Tiling & Plumbing Checks
Waterproofing, tiling, and plumbing are the areas where bathroom renovation quality matters most. These items can affect durability, compliance, maintenance risk, and future repair costs.
Waterproofing should be treated as a critical part of the bathroom renovation, not a small background item. Ask whether waterproofing is included, who performs it, whether it meets relevant standards, and whether any documentation or certificate will be provided after completion.
Tiling costs depend on tile size, tile type, wall coverage, floor preparation, niche details, mitred edges, patterns, waterproofing layers, and labour time. A quote should clearly state whether tiles are supplied by you or by the contractor, and what allowance has been used.
Plumbing changes can materially increase the total cost, especially if the toilet, shower, bath, vanity, drainage, or mixer locations are being moved. Keeping the same layout is usually one of the most effective ways to control the budget.
7. Bathroom Quote Red Flags
Bathroom renovations involve waterproofing and multiple trades, so unclear quotes can create serious cost and quality risks. Watch for these warning signs before committing.
Be careful with quotes that do not clearly mention waterproofing, plumbing scope, tile allowance, fixture allowance, demolition, rubbish removal, electrical work, ventilation, certification, or final clean-up. These missing details can make a quote look cheaper than it really is.
Also be cautious if the quote uses vague wording such as standard fixtures, basic tiles, plumbing as required, or waterproofing included without explaining the allowance, product, responsibility, or compliance process.
8. Plan Your Bathroom Budget
Before approving a bathroom renovation quote, build a realistic budget that includes the visible finishes, hidden trade work, compliance requirements, and a buffer for unexpected site issues.
A safe bathroom renovation budget should not only cover the builder or renovator’s headline quote. It should also allow for waterproofing, plumbing changes, electrical work, tile wastage, fixture upgrades, demolition, rubbish removal, ventilation, and small finishing details that are easy to overlook.
For most homeowners, the biggest budgeting mistake is comparing quotes by total price only. A $20,000 quote may be better value than a $16,000 quote if it includes better waterproofing detail, clearer fixture allowances, proper trade coordination, and fewer exclusions.
Before paying a deposit, ask the provider to confirm what is included, what is excluded, what allowances are provisional, and what may trigger extra charges. This makes the quote easier to compare and reduces the risk of unexpected variation claims.
9. Questions to Ask Before Accepting a Bathroom Quote
Use these questions to make the quote clearer before you approve the renovation, pay a deposit, or compare it against another bathroom contractor.
Does the quote include waterproofing, and will documentation or certification be provided?
Are tiles, fixtures, tapware, vanity, toilet, shower screen, mirror, and accessories included or listed as allowances?
Does the price include demolition, rubbish removal, plumbing, electrical work, ventilation, waterproofing, tiling, and final clean-up?
What extra charges may apply if water damage, old plumbing, uneven floors, asbestos risk, or hidden defects are found after demolition?
How will variations be approved, priced, documented, and paid during the renovation?
Not sure which guide fits your project?
Start a free cost check and FairScope AI will recommend the right report level for your project.
It only takes 2 minutes
2,500+
Reports Generated
98%
Customer Satisfaction
Australia
Market Focused
Secure & Private
Your data is protected