Thinking about how bathroom renovations can transform your home? Before you renovate the bathroom, it is important to understand what goes into planning, budgeting and managing a successful upgrade. While choosing finishes and creating your ideal design is exciting, there are several essential facts you should know before renovating the bathroom so you can make informed decisions and achieve the result you want.
Bathroom Renovations and What to Know Before You Start
Before you commit to layouts, tiles and fixtures, it is worth stepping back and looking at the practical details that make a renovation run smoothly. The points below cover the key decisions, compliance requirements and planning steps that influence cost, timelines and the finished result, so you can move forward with clarity and avoid preventable surprises.
1. Where Do I Start When Planning to Renovate the Bathroom?
If you are undertaking a full redesign, your first step is to speak with your builder or the McColl Cabinetmakers team about what you want to achieve. We help assess whether your ideas will work within the space, provide guidance on functionality and aesthetics and turn your vision into a practical, buildable plan.
Our 3D design programs allow you to preview your bathroom renovation before demolition begins. We also manage trades and project sequencing to ensure the entire process runs smoothly.
2. Do I Need Approvals, Licenses or Insurance Before Bathroom Renovations Begin?
Bathroom renovations in Queensland often require licensed trades and, in many cases, mandatory insurance.
Key points:
- Work over $3,300 typically requires QBCC Home Warranty Insurance, which your contractor arranges.
- Electrical, waterproofing and plumbing work must be completed by licensed professionals.
- Structural changes, relocating plumbing fixtures, or altering drainage may require building approval.
We help you determine what approvals and documentation apply to your specific project.
3. Which Trades Do I Need to Renovate the Bathroom?
If you want a complete walk-in, walk-out service, McColl Cabinetmakers manages everything. If you prefer to supply some trades, you will typically need:
- Plumber – especially for relocating toilets, vanities or showers.
- Cabinetmaker – to ensure high-quality custom cabinetry.
- Waterproofer – licensed and compliant with current Australian Standards.
- Tiler – for floor and wall tiling.
- Electrician – for lighting, power, exhaust fans and heated accessories.
- Carpenter, plasterer and painter – depending on design changes.
Asbestos checks may also be required. We can arrange testing if your home was built before the mid-1990s.
4. What Should I Know About Waterproofing Standards in Australia?
Bathroom waterproofing must comply with AS 3740:2021 – Waterproofing of Domestic Wet Areas and the NCC (National Construction Code). Requirements generally include:
- Full waterproofing of the entire shower floor and walls to 1800mm.
- Waterproofing to a minimum height around baths, vanities and other splash zones (typically 150mm).
- Full waterproofing of all floors in upstairs bathrooms or wet areas built on timber substrates.
Always obtain a statement of compliance from your licensed waterproofer.
5. How Much Do Bathroom Renovations Cost?
The cost of a bathroom renovation varies significantly depending on materials, labour, layout changes and fixture selections. As a guide:
- Many bathroom renovations fall between $10,000 and $30,000+.
- The HIA reports the average spend on a bathroom renovation in Australia is approximately $19,500.
Custom cabinetry, premium tiles and high-end fixtures will increase costs, while retaining the existing layout can reduce plumbing expenses.
6. Should I Change My Bathroom Layout?
Keeping your current layout is generally more cost-effective because it avoids major plumbing relocations. However, if your existing layout does not function well, redesigning the space may be worth the investment.
Consider:
- How you use the space daily
- Whether key fixtures feel cramped
- Whether accessibility or future needs should influence your design
Our design team can show you multiple layout options so you can compare functionality and cost.
7. How Important Is Ventilation and Mould Control?
Proper ventilation is essential for protecting your bathroom renovation investment. Under the NCC, bathrooms must have either:
- A window to the exterior or a mechanical exhaust system ducted outside, not into the roof cavity
A well-sized, ducted fan, humidity sensor or run-on timer helps prevent mould, peeling paint and swollen cabinetry.
8. What Electrical and Lighting Safety Rules Apply?
All electrical work must be completed by a qualified electrician. Bathrooms contain designated “zones” that dictate:
- Where power points can be located
- Which lighting fixtures require higher IP (Ingress Protection) ratings
- Safe installation of heated towel rails and underfloor heating
We help design lighting layouts that balance safety, ambience and practicality.
9. How Do I Choose Tiles for Bathroom Renovations?
Ceramic and porcelain tiles are the most popular choices for durability, maintenance and cost-effectiveness. Keep in mind:
- Some tile types require more labour to lay, which affects cost
- Larger tiles create a more seamless look but may require more skill to install
- Slip-resistant floor tiles are recommended for wet areas
Our team can help you select tiles that suit both your design and budget.
10. How Can I Improve Water Efficiency in My Bathroom?
Water-efficient fixtures reduce both water and energy bills. Look for:
- WELS-rated tapware and showerheads with 3 stars or higher
- Dual-flush toilets with strong star ratings
- Efficient mixers that provide good flow control
Choosing the right fixtures not only supports sustainability but also enhances long-term savings.
11. Should I Plan for Accessibility or Future Needs?
Future-proofing your bathroom renovation ensures long-term value and comfort. Consider:
- Hobless walk-in showers
- Wider circulation space
- Lever-style tapware
- Provision for future grab rails
- Non-slip flooring
These design choices make the space safer and more practical without compromising style.
12. Do I Need to Plan My Living Arrangements During the Renovation?
Bathroom renovations can take two to eight weeks, depending on scope, trades and product lead times. If you only have one bathroom, consider:
- Temporary shower/toilet options
- Scheduling the renovation when household members are away
- Using external facilities if needed
Custom items like shower screens may take additional time after final measurements.
13. What Storage Should I Include in My Bathroom Renovation?
Bathroom storage is one of the most overlooked design decisions. Think about:
- Built-in cabinetry for long-term organisation
- Where standalone items (laundry hampers, shelves, baskets) will fit
- How to maximise space in compact rooms
Smart storage ensures your bathroom functions well every day.
14. What Warranties, Certificates and Documentation Should I Receive?
At completion of your bathroom renovation, you should receive:
- Waterproofing compliance documentation
- Electrical certificates of compliance
- QBCC Home Warranty Insurance documents (if required)
- Product warranties for fixtures, fittings and appliances
McColl Cabinetmakers ensures you receive all relevant documentation for peace of mind.
Ready for Your Bathroom Renovations?
Renovating the bathroom is an investment in comfort, functionality and property value. With expert design, precise workmanship and full project coordination, McColl Cabinetmakers delivers bathroom renovations that are built to last.
If you would like help planning your next bathroom renovation, don’t hesitate to contact us. Our team is here to guide you through every step.
Corey Cameron, Director of McColl Cabinetmakers, brings with him more than 30 years of experience in cabinetmaking and home renovations. This extensive exposure to hands-on work has ensured the highest standards in home and bathroom renovations.