Bathroom Renovation Builders Sydney — Licensed Bathroom Renovations Across Western Sydney
AS 3740 waterproofing compliance. Licensed builder. Fixed price. The only way to legally certify bathroom waterproofing in NSW.
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Bathroom renovation in Western Sydney: standard from $18,000, quality $35,000–$55,000, premium $55,000–$90,000+. Ensuite from $15,000. Buildana is a licensed builder — AS 3740 waterproofing certified and inspected on every bathroom. Fixed-price contract.
Why a Licensed Builder for Bathroom Renovations
Bathroom waterproofing must comply with AS 3740 — it's mandatory under the National Construction Code for all wet areas in NSW. The waterproofing membrane must be applied by a licensed builder and inspected by a certifier before any tiling begins. Tile-only companies and unlicensed tradies cannot legally certify waterproofing. This is the single biggest reason to use a licensed builder for your bathroom renovation.
Buildana delivers bathroom renovations across Fairfield, Liverpool, Cumberland, Canterbury-Bankstown and Blacktown. Full gut-and-refit, ensuite additions, main bathroom upgrades — all with certified AS 3740 waterproofing, licensed plumbing and electrical, and a fixed-price contract. NSW Contractor Licence 487805C.
If your bathroom waterproofing fails, it's classified as a major defect under the Home Building Act 1989 — covered by the 6-year structural warranty. Unlicensed work has no statutory warranty, no HBC coverage, no certifier inspection. The risk is yours.
- AS 3740 waterproofing — certified and inspected
- Standard bathroom from $18,000 · Premium from $55,000
- Ensuite renovations from $15,000
- Licensed builder — plumbing, electrical, structural all managed
- Fixed-price contract — every element itemised
- Sydney-wide: Fairfield, Liverpool, Cumberland, Canterbury-Bankstown, Blacktown + more
- 3–8 week completion depending on scope
- 6-year structural warranty on waterproofing
Why a Licensed Builder for Bathroom Renovations — AS 3740
AS 3740 is the Australian Standard for waterproofing of domestic wet areas. It is mandatory for all bathrooms in NSW under the National Construction Code. The waterproofing membrane must be applied to the correct thickness, coverage and overlap specifications — and inspected by a certifier before any tiling begins.
Most bathroom-only companies and tile installers are not licensed builders. They cannot legally certify waterproofing. If waterproofing is done by an unlicensed operator:
- ✗No statutory warranty under the Home Building Act 1989
- ✗No Home Building Compensation Fund (HBC) coverage
- ✗No certifier inspection of the membrane
- ✗If it fails — water damage, mould, structural repair — the cost is yours
Buildana provides certified waterproofing on every bathroom renovation. Waterproofing failure is classified as a major defect — covered by the 6-year structural warranty. This is your protection.
Ensuite Renovations
Ensuite renovations are different from main bathroom renovations. Smaller scope. Adjacent to the master bedroom. Often the upgrade that transforms how you start your day. Popular ensuite features across Western Sydney include heated floors, double vanities with stone tops, frameless shower screens, and premium matte black or brushed nickel fixtures.
Ensuite standard
$15,000–$30,000
Ensuite quality
$30,000–$45,000
Heated floors
$1,500–$3,000
Double vanity
$2,500–$5,000
Have a question about your project?
Talk to our team — free site assessment and fixed-price quote.
How It Works
From First Call to Final Key
We visit your home, measure the existing bathroom, and discuss your vision. Tile, fixture and finish selections with our design coordinator — samples provided.
⏱Detailed fixed-price quotation covering every element — demolition, waterproofing, plumbing, tiling, fixtures, vanity, electrical and finishes. No provisional sums.
⏱Existing bathroom stripped to frame. Plumbing and electrical rough-in. AS 3740 waterproofing membrane applied and inspected by certifier before any tiling begins.
⏱Wall and floor tiles installed. Vanity, shower screen, toilet, tapware, mirror, accessories and lighting fitted. Plumbing connections completed.
⏱Final clean, plumbing pressure test, sealant cure check. Warranty documentation including waterproofing certificate. 6-year structural warranty.
⏱Our Team
Oliver Alameri
Founder / Director / Builder
Ahmad Alameri
Accounts Manager
Claire Wendell
Project Manager
Estimate Your Build Cost
Use our free calculator to get an instant cost estimate for your project
Cost Guide
| Item | Estimated Range |
|---|---|
| Standard bathroom | $18,000 – $35,000 |
| Quality bathroom | $35,000 – $55,000 |
| Premium / luxury | $55,000 – $90,000+ |
| Ensuite (standard) | $15,000 – $30,000 |
| Waterproofing (AS 3740 certified) | $2,500 – $4,500 |
| Custom vanity (supply + install) | $2,000 – $6,000 |
Prices are indicative for Western Sydney (2025). Actual costs depend on site, specifications, and approvals.
Ready to take the next step?
Free consultation — no obligation, no pressure.
Frequently Asked Questions
“Buildana built our granny flat in just 12 weeks. Fast approvals, great communication, and a beautiful final product. Highly recommend.”
Fatima Al-Rashid
Liverpool, NSW
We Build Across Sydney
Buildana builds across greater Sydney — with deep roots in Western Sydney's Fairfield, Liverpool, Cumberland, Canterbury-Bankstown, and Blacktown LGAs.
Last updated: 1 July 2025
Book Your Free Bathroom Consultation
We'll visit your home, assess your bathroom, and provide a fixed-price quote with certified waterproofing. Across Sydney.
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