Complete Bathroom Renovation Estimator
Get bathroom renovation cost estimates by tier (budget, mid-range, luxury). Includes mandatory waterproofing and electrical compliance certificates.
Itemised Cost Breakdown
Includes strip-out, waterproofing, tiling, plumbing rough-in, and electrical fit-off.
8m² @ $2750/m²
Mandatory for wet areas
Licensed electrician sign-off
Licensed plumber sign-off
Mandatory Certifications Required
All bathroom renovations require professional certifications.
- ✅ Waterproofing Certificate (AS 3740) - mandatory
- ✅ Electrical Compliance Certificate - licensed electrician
- ✅ Plumbing Compliance Certificate - licensed plumber
- Certifications must be lodged with council
- No occupation of bathroom until certified
Internal wet area waterproofing must strictly comply with Australian Standard AS 3740. Require your contractor to provide a signed Waterproofing Compliance Certificate / Form 43 and product warranty before final payment.
Calculator Methodology & Planning FAQs
How are labor rates calculated?
Hourly rates are modeled off the Building and Construction General On-site Award [MA000020] Level CW3 base ($31.40–$32.80/hr) with statutory 25% casual loading, 12% superannuation, and a 2.0x–2.5x commercial chargeout factor ($90–$115/hr billing benchmark).
When do I need council approval?
Exempt development criteria differ by jurisdiction (e.g. retaining walls over 1.0m in NSW/VIC or over 0.5m in WA trigger mandatory building permits). Review our state compliance guides before ordering materials.