Andrew Hooper
24 March 2025

To renovate your bathroom successfully, start with smart budgeting, quality materials, and expert installation. A well-planned approach ensures a seamless upgrade that enhances both comfort and value.

Bathroom remodels can breathe new life into your home, improving both functionality and aesthetics. However, a successful remodel requires a renovation process that involves careful planning, budgeting, and execution.

In this step-by-step guide, we will outline the essential bathroom renovation steps and provide insights on how to plan a bathroom renovation effectively.

Step 1: Define Your Renovation Goals

Before renovating, define your goals—whether for modern designs, functionality, or home value—to guide decisions and avoid unnecessary costs or delays. Prioritize key aspects like space optimisation, safety, or luxury features.

Key Considerations:

• Storage: Add built-in cabinets or shelves to reduce clutter in the bathroom space.
• Fixtures: Upgrade outdated fixtures for better efficiency and style.
• Accessibility: Incorporate grab bars, walk-in shower tub, and slip-resistant floor tiles.
• Style & Color: Choose a cohesive design that matches your vision, from minimalist to spa-like aesthetics.

Step 2: Set a Realistic Budget

The cost of a bathroom renovation varies based on size, materials, and labour. Establishing a budget early on allows you to make informed decisions and prevents overspending. It’s also crucial to allocate a contingency fund of at least 10-15% of your total budget to cover unexpected expenses, such as plumbing issues, structural repairs, or changes in material costs.

Cost Breakdown

• Labour & Installation (40-50%): Professional labour, including plumbing, tiling, and electrical work, forms a significant portion of the cost. Hiring experienced tradespeople ensures quality workmanship and adherence to Australian building codes.
• Fixtures & Fittings (20-30%): This includes sinks, toilets, taps, showers, bathtubs, and mirrors. The cost will depend on the brand, material, and design you choose.
• Tiles & Flooring (10-20%): Premium tiles and waterproof flooring add durability and style to your bathroom. Large-format tiles or natural stone options can increase costs.
• Plumbing & Electrical (10-15%): Relocating plumbing lines and upgrading electrical wiring can be costly. Opt for energy-efficient lighting and water-saving fixtures to reduce long-term expenses.
• Miscellaneous/Contingency (10-15%): Unexpected issues like structural damage, mould, or changes in design can impact the budget, making a contingency fund essential.

Expensive Components to Consider

• Asbestos Removal (if applicable): Older homes may contain asbestos, which requires professional removal to meet safety regulations.
• Custom Vanities and Cabinets: Bespoke storage solutions tailored to your space can be pricier than pre-made options but offer superior functionality and visual appeal.
• High-End Fixtures and Fittings: Luxury finishes such as gold-plated taps, frameless glass showers, and smart toilets can drive up costs but add a premium touch to your bathroom.

Certain upgrades, like asbestos removal, custom vanities, and high-end fixtures, can significantly impact your renovation budget. Know the expensive parts of bathroom remodeling to plan wisely and avoid unexpected costs.

Step 3: Plan the Layout & Design

Your bathroom layout should be both practical and visually appealing. A well-optimised layout maximizes space efficiency while ensuring comfort and functionality. Changing the existing layout may require additional plumbing and electrical work, which can significantly increase costs.

Therefore, it’s important to evaluate whether the floor plan adjustments are necessary. Consulting a draftsperson can help you visualise layout changes and ensure that structural modifications comply with building regulations.

Layout Planning Tips

• Keep plumbing fixtures in their current location to save costs.
• Maximize natural light with windows or skylights.
• Ensure minimum distances are maintained between fixtures for comfort and accessibility.
• Optimise space with smart storage solutions.
• Consider traffic flow and accessibility.
• Plan for adequate ventilation.

Other considerations: If you’re modifying a bathroom for accessibility, consider NDIS-approved bathroom modifications to ensure the space meets safety and functionality requirements for individuals with disabilities.

Step 4: Choose Materials & Fixtures

Selecting the right materials ensures durability, aesthetics, and long-term performance. Since bathrooms are exposed to moisture, heat, and daily wear and tear, it’s crucial to choose materials that are water-resistant, easy to maintain, and capable of withstanding humidity.

Recommended Materials

• Flooring: Porcelain or ceramic tiles are excellent choices for bathroom floors due to their durability, water resistance, and ease of cleaning. Textured or non-slip tiles can enhance safety, especially in wet areas.
• Countertops: Quartz and granite are both highly durable and resistant to stains, making them ideal for bathroom vanities. Quartz offers a sleek, modern look with minimal maintenance, while granite adds a touch of natural elegance.
• Shower & Walls: Waterproof panels and large-format tiles minimize grout lines, reducing mould buildup and making cleaning easier. For a more luxurious look, consider marble or stone-effect porcelain tiles.
• Fixtures: Water-efficient taps, toilets, and shower heads help conserve water and reduce utility bills. Look for fixtures with a high WELS (Water Efficiency Labelling and Standards) rating to ensure eco-friendly performance.

Step 5: Hire the Right Professionals

A successful renovation depends on skilled professionals. Hiring a licensed contractor ensures compliance with state building regulations and codes and guarantees high-quality work. The right team will help you avoid costly mistakes, ensure safety regulations are met, and bring your vision to life efficiently.

Who You May Need

• Builder/Contractor: Oversees the entire project, manages timelines, and ensures that all work is up to code. They coordinate with other professionals, such as plumbers and electricians, to streamline the process.
• Plumber: Installs pipes, taps, drainage, and water systems. A professional plumber ensures leak-free connections and proper water pressure, which is essential for a functional bathroom.
• Electrician: Handles lighting, power outlets, exhaust fans, and any electrical installations. They ensure compliance with safety standards and install energy-efficient lighting options.
• Tiler: Lays floor and wall tiles, ensuring proper waterproofing and alignment. A skilled tiler enhances the bathroom’s appearance while preventing water damage with high-quality finishes.
• Joiner: Builds and installs custom vanities, shelving, or any woodwork required in the bathroom.
• Painter: Applies moisture-resistant paint to walls and ceilings to protect against humidity and mould.
• Carpenter: Straightens walls, changes layout, installs sliding doors.

Step 6: Secure Permits & Approvals

Depending on the scope of your project, you may need council approvals, especially if plumbing, electrical, or structural changes are involved. Australian building codes and local council regulations require compliance to ensure the safety and efficiency of the renovation. Failure to secure the necessary permits can result in delays, fines, or additional costs for rework.

Common Permits Required

• Plumbing: Any major changes to plumbing that require approval, and licensed professionals must complete the work and provide certification.
• Structural Modifications: Altering the bathroom layout, such as removing walls or expanding space, requires approval to comply with building codes and maintain structural integrity.
• Waterproofing Compliance Certificates: Licensed professionals must apply and certify waterproofing to meet Australian Standards (AS 3740) and prevent leaks or water damage.
• Demolition Permits (if applicable): Extensive demolition, especially in older homes with asbestos, may require a permit for safe removal and disposal.
• Heritage or Zoning Permits (if applicable): If your property is located in a heritage-listed area or subject to zoning regulations, additional approvals may be required to ensure compliance with conservation guidelines.

How to Obtain Permits

1. Consult Your Local Council: Visit your local council’s website or office to check which permits are required for your specific renovation.
2. Engage Licensed Professionals: Many permits require work to be completed by licensed tradespeople. Ensure your contractor, plumber, or electrician has the necessary qualifications and can assist with permit applications.
3. Submit Applications Early: Permit approval times can vary, so it’s best to submit applications well in advance to avoid project delays.
4. Schedule Inspections: Some permits require inspections during and after work completion to verify compliance. Factor this into your project timeline.
5. Leave it to us so we can arrange all this for you.

Step 7: Demolition & Preparation

Before construction begins, your existing bathroom must be stripped down to make way for new installations. This phase requires careful planning to avoid damaging essential structures and utilities. Demolition is more than just tearing down old fixtures—it involves safely handling materials, assessing potential hazards, and ensuring the space is ready for renovation.

Demolition Checklist

• Remove Old Fixtures and Tiles: Carefully disconnect sinks, toilets, and showers, and consider donating or recycling items in good condition.
• Address Mould or Structural Issues: Inspect and repair any water damage, rot, or mould before renovating.
• Check for Asbestos Before Demolition: Older homes may contain asbestos, requiring a professional assessment and licensed removal if found.
• Shut Off Water and Electricity: Turn off the water supply and electrical connections to prevent leaks or electrocution hazards.
• Protect Surrounding Areas: Use plastic sheets or dust barriers to contain debris and ensure proper ventilation to minimize dust accumulation.
• Dispose of Debris Properly: Coordinate with contractors or waste services to recycle or responsibly dispose of materials like tiles, porcelain, and metals.

Step 8: Plumbing, Electrical & Waterproofing

Once demolition is complete, the next crucial step is installing essential plumbing, electrical wiring, and waterproofing measures to create a functional and safe bathroom environment. This stage is critical as improper installation can lead to leaks, mould growth, or electrical hazards.

Licensed professionals should carry out these tasks to ensure compliance with Australian building standards and safety regulations.

Essential Tasks

• Install Plumbing and Drainage Lines: Proper installation of pipes for sinks, showers, bathtubs, and toilets ensures efficient water flow and prevents leaks or blockages.
• Set Up Lighting and Ventilation: Task lighting, ambient lighting, and an exhaust fan help enhance functionality and airflow and prevent moisture buildup.
• Apply Waterproofing Membranes: A liquid waterproofing membrane is applied to wet areas to prevent water damage and must comply with AS 3740 standards.
• Test All Systems Before Moving to the Next Stage: Plumbers and electricians must test pipes, drainage, and electrical fixtures to ensure the work was done correctly before tiling.

Step 9: Tiling & Painting

Once the waterproofing is complete, tiling and painting can begin. This stage is essential for enhancing both the look and feel of your bathroom while ensuring durability. Choosing high-quality materials and proper application techniques will ensure longevity while contributing to a fresh, clean aesthetic.

Best Practices

• Use Light-Colored Tiles for a Spacious Feel: Light shades like white, beige, or pastels reflect more light, making small bathrooms appear larger.
• Opt for Moisture-Resistant Paint: High-quality, mould-resistant paint with a satin or semi-gloss finish prevents mildew buildup and withstands bathroom humidity.
• Ensure Tiles Are Leveled Properly: Properly leveled tiles prevent water pooling and drainage issues, ensuring a smooth and flawless finish.
• Choose Slip-Resistant Flooring: Matte or textured tiles with a high slip-resistance rating (R10 or higher) help reduce the risk of slipping on wet floors.
• Grout Selection and Sealing: Light grout blends seamlessly, dark grout creates contrast, and sealant prevents stains, mould, and water damage.
• Proper Ventilation During Painting: Open windows or use exhaust fans to speed up drying time and reduce exposure to strong fumes.
• Allow Sufficient Drying Time: Let tiles and paint cure fully to prevent peeling, cracked grout, or poor adhesion before proceeding.

Step 10: Installing Fixtures & Fittings

Once the tiling and painting are complete, the next step is installing key fixtures and fittings that will bring your bathroom together. This stage includes the placement of vanities, sinks, toilets, showerheads, taps, mirrors, and lighting. Ensuring proper alignment and secure installation is crucial for both functionality and aesthetics.

Installation Priorities

• Toilet and Sink Placement: These fixtures should be installed first, ensuring secure plumbing connections and comfortable positioning.
• Shower or Bathtub Fitting: Proper sealing and alignment prevent leaks, with bathtubs leveled and glass shower screens securely mounted.
• Mirror and Lighting Fixtures: Mirrors create a spacious feel, while well-placed lighting improves brightness and functionality.
• Tapware and Shower Heads: Water-efficient taps and showerheads should be installed carefully to prevent leaks and ensure proper water pressure.
• Towel Racks and Storage Solutions: Install wall-mounted or freestanding racks, shelves, and hooks at convenient heights for accessibility.
• Final Plumbing and Electrical Checks: Test all fittings, check for leaks, and ensure lighting, exhaust fans, and heated towel rails are working properly.

Step 11: Final Touches & Clean-Up

Once the renovation is complete, final inspections and thorough cleaning are necessary to ensure everything is in perfect working order before using your new bathroom. This stage is crucial for identifying any minor issues that need fixing, ensuring compliance with building standards, and giving your bathroom a polished, ready-to-use appearance.

Final Checklist

• Test Plumbing and Electrical Systems: Run all taps, showers, and toilets to check for leaks, water pressure, and drainage, and test electrical fixtures for functionality.
• Apply Silicone Sealing Where Needed: Seal gaps around bathtubs, sinks, and shower enclosures with waterproof silicone to prevent leaks and mould growth.
• Inspect Tile Grout and Caulking: Check for cracks or gaps in grout lines and apply sealant if necessary to improve durability and water resistance.
• Deep Clean and Remove Debris: Thoroughly clean surfaces, mirrors, and tiles to remove construction residue, adhesive, and dust.
• Ventilation Check: Ensure exhaust fans or windows are effectively removing moisture to prevent mould and mildew buildup.
• Fixture and Fitting Adjustments: Secure and adjust towel racks, shower screens, and cabinet doors to ensure stability and functionality.
• Final Inspection by Professionals (if applicable): If permits were required, schedule an official inspection to confirm compliance with plumbing, electrical, and waterproofing regulations.

Planning for a Successful Bathroom Renovation

A well-planned renovation enhances both comfort and home value. By following these aspects of the renovation, you can achieve a seamless transformation. If you’re unsure how to renovate a bathroom successfully, consulting professionals can help you avoid costly mistakes.

If unexpected challenges arise, having a contingency plan can prevent unnecessary stress and budget overruns. Whether you opt for a full remodel or minor upgrades, ensuring quality materials and skilled professionals will guarantee lasting results.

Looking for expert bathroom renovations in Australia? Contact Class Constructions for a consultation today!

Frequently Ask Questions

What Are the Key Steps in a Bathroom Renovation?

A bathroom renovation involves several critical steps, including planning and budgeting, obtaining necessary permits, demolition, plumbing and electrical installation, waterproofing, tiling, fixture installation, and final clean-up. Each step ensures the renovation is done efficiently and up to building code standards.

What Is the Most Expensive Part of a Bathroom Renovation?

The most costly parts of a bathroom renovation typically include asbestos removal, fixtures and fittings, and custom vanities. Removing hazardous materials like asbestos, choosing high-end fittings, or opting for bespoke cabinetry can significantly impact the total cost of your remodel.

How Do I Plan My Bathroom Renovation to Stay Within Budget?

To stay within budget, define your renovation goals early, prioritize essential upgrades, and allocate costs wisely. Keeping plumbing fixtures in their existing locations and choosing cost-effective materials can help manage expenses. Always set aside 10-15% of your budget for unexpected costs.

What Permits Are Required for a Bathroom Renovation?

Depending on your project’s scope, you may need plumbing and electrical permits, structural modification approvals, and waterproofing compliance certificates. If asbestos removal or major layout changes are involved, additional permits may be required. It’s best to check with your local council for specific regulations.

How Long Does a Bathroom Renovation Take?

A bathroom renovation typically takes 3 to 6 weeks, depending on the complexity of the project. Demolition, plumbing, electrical work, and waterproofing take the most time while tiling, fixture installation and finishing touches follow. Proper planning and hiring experienced professionals can help ensure timely completion.