What Goes Into a Complete Bathroom Renovation?

Planning a bathroom renovation can be both exciting and overwhelming—especially when you’re not sure what’s actually involved. From plumbing and waterproofing to fittings, fixtures, and timelines, there’s a lot more to a complete bathroom makeover than picking tiles and tapware.

In this guide, we’ll walk you through the full renovation process step-by-step, so you know what to expect, how to avoid costly surprises, and how to make confident decisions at every stage. Whether you’re upgrading a tired space, solving plumbing issues, or adding value to your property, this article is designed to help you plan smarter—and renovate with confidence.

Here’s what we’ll cover:

• Thinking About a Bathroom Renovation?
• Why Bathroom Renovations Are More Than Just Aesthetic Upgrades
• Step-by-Step: What Really Goes Into a Complete Bathroom Makeover
• Budgeting: How Much Does a Bathroom Renovation Cost in Sydney?
• Timeline: How Long Does a Full Bathroom Renovation Take?
• Local Expertise: Why Hire a Licensed Bathroom Plumber in Sydney
• Conclusion – Ready to Start Your Bathroom Renovation?

First, let’s understand why a bathroom renovation is about more than just looks.

Thinking About a Bathroom Renovation?

A bathroom renovation is one of the most rewarding ways to refresh your home—but it’s also a project that comes with many moving parts. Whether you’re dreaming of a sleek modern upgrade, fixing outdated plumbing, or simply trying to make better use of the space, knowing what’s involved from the outset can make all the difference.

Many homeowners start with questions like: Where do I begin? Do I need a plumber, or just a builder? How long will it take? And perhaps most importantly—how do I avoid unexpected costs and delays? These are all valid concerns, especially when it comes to a room as essential (and frequently used) as the bathroom.

The best way to plan a bathroom renovation is to think beyond just the tiles and fixtures. A successful remodel isn’t just about aesthetics—it’s about functionality, waterproofing, plumbing, ventilation, and ensuring everything meets local regulations.

For example, if you’re reconfiguring your layout or installing a new shower or toilet, you’ll definitely need a licensed plumber to reroute pipes and ensure compliance with NSW building codes.

At In House Plumbing, we’ve seen firsthand how a well-planned renovation can transform not just the look, but the everyday comfort and value of a home. And we’ve also seen how small missteps—like skipping waterproofing or underestimating timelines—can lead to bigger issues down the track.

Key takeaway: With the right guidance, a bathroom renovation doesn’t have to feel overwhelming. Understanding what really goes into the job will help you plan better, avoid hidden pitfalls, and make choices that stand the test of time. Let’s walk through each stage so you can approach your project with clarity and confidence.

Why Bathroom Renovations Are More Than Just Aesthetic Upgrades

It’s easy to think of a bathroom renovation as just a cosmetic project—new tiles, a fresh vanity, updated fixtures. But the truth is, a complete bathroom makeover involves much more than meets the eye. Behind the polished finishes are critical structural and plumbing elements that directly impact your home’s safety, functionality, and long-term value.

A thoughtful renovation considers not just how your bathroom looks, but how it works.

Functional Design and Layout Improvements

Your bathroom’s layout should serve your daily routine, not get in the way of it. A smart redesign can solve common frustrations—like poor storage, awkward traffic flow, or cramped shower spaces—by rethinking the placement of key features like the toilet, vanity, and shower.

For example, many Sydney homes still have bathrooms that haven’t changed since the 80s or 90s, with layouts that no longer suit modern lifestyles. A functional bathroom design might involve shifting plumbing lines to reposition fixtures, which is where professional planning and licensed plumbers come in. It’s not just about moving things around—it’s about making the space work better for you.

Addressing Hidden Plumbing Issues

A bathroom renovation is the perfect time to fix what’s behind the walls. Ageing pipes, poor drainage, or outdated materials can all pose long-term problems if left untouched. Once tiles and flooring are removed, licensed plumbers can assess the condition of your pipes, drains, and water pressure to catch issues early—before they become costly emergencies.

We’ve worked on many bathroom renovation projects in Sydney where homeowners discovered corroded copper pipes or slow leaks that had gone unnoticed for years. By addressing these problems during the renovation, they avoided future water damage and saved money in the long run.

If your bathroom renovation includes plumbing work—especially tasks like rerouting pipes or installing a new shower or toilet—always involve a licensed bathroom plumber from the start.

Safety, Waterproofing & Legal Compliance

Renovating a bathroom in NSW isn’t just about style—it’s also about meeting legal and safety standards. Poor waterproofing is one of the most common causes of building defects in Australian homes. That’s why it’s crucial to ensure your bathroom complies with NSW waterproofing requirements, which include using licensed waterproofers and approved membrane systems.

In some cases—such as if you’re changing the layout or altering structural elements—you may also need council approval. A professional team can advise on what permits are required and ensure your renovation is done to code.

Ignoring these details can lead to expensive repairs down the line—not to mention potential issues when selling your home. Working with experienced professionals ensures the job is done right, safely, and legally.

Key takeaway: A complete bathroom renovation isn’t just about creating a beautiful space—it’s about improving your home’s performance, longevity, and compliance. By focusing on smart layout choices, resolving hidden plumbing issues, and meeting safety regulations, you’ll build a bathroom that looks great and works flawlessly for years to come.

Step-by-Step: What Really Goes Into a Complete Bathroom Makeover

A successful bathroom renovation doesn’t just happen overnight—it’s a structured process that blends planning, trade coordination, and skilled execution. Understanding each phase ahead of time helps you stay informed, reduce surprises, and work more smoothly with your renovation team.

Here’s a clear, step-by-step breakdown of what actually goes into a complete bathroom makeover, from first inspection to final polish.

Initial Assessment and Design Planning

Every great renovation starts with a detailed assessment. This includes evaluating your existing plumbing, drainage, and structure to determine what’s feasible—and what might need upgrading. It’s also the time to set your goals: Do you want more space? Better lighting? A layout that actually flows?

In this phase, you’ll:

• Meet with your plumber or renovation specialist
  
• Finalize your design preferences, functionality needs, and must-haves
  
• Choose materials, fixtures, tapware, and tiles
  
• Receive a clear project timeline and cost estimate

Working with a professional at this stage ensures that your dream design lines up with your plumbing and budget realities.

Demolition and Structural Prep

Once the plan is in place, the old bathroom needs to be safely stripped out. This isn’t just ripping out tiles—it’s a strategic process to protect your property and prepare for new installations.

This step typically includes:

• Disconnecting old plumbing and electrical safely
  
• Removing tiles, vanities, bathtubs, and fixtures
  
• Assessing the condition of underlying walls, floors, and substructures
  
• Preparing surfaces for waterproofing and new fittings

If structural changes are involved—such as relocating walls or widening entries—this is the phase where they’re carried out. Consider bathroom demolition services for safe, professional prep.

Plumbing, Waterproofing, and Electrical

This is the technical heart of the renovation. Licensed trades come in to update the plumbing, lay down waterproofing membranes, and reroute wiring where needed. A quality outcome here protects your home from leaks, damp, and future failures.

Your plumbing checklist for bathroom renovation at this stage may include:

• Pipe rerouting for new layout
  
• Installation of drainage systems for shower, toilet, and vanity
  
• Ensuring correct pipe gradients and venting
  
• Leak testing before waterproofing begins

Waterproofing is then applied to all wet areas according to NSW building codes, and electricians install lighting, switches, and ventilation systems in line with your design.

Tiling, Fittings, Fixtures, and Finishings

With the groundwork in place, your bathroom starts taking shape. This is where your choices in style and finishes come to life.

Tasks in this stage include:

• Floor and wall tiling
  
• Installation of shower screens, vanities, and tapware
  
• Mounting of mirrors, storage solutions, towel rails, and lighting
  
• Final plumbing connections for toilets, basins, and mixers
  
• Paint touch-ups and silicone sealing

Attention to detail is key here—quality tradespeople will make sure everything lines up neatly and functions perfectly.

Final Walkthrough, Cleanup & Sign-off

Before the job wraps, your team will walk through the space with you to check for any issues or last-minute touch-ups.

This final stage includes:

• Testing all plumbing fixtures for pressure, drainage, and leaks
  
• Confirming that waterproofing, electrical, and tiling meet compliance
  
• Thorough cleanup of the site—no mess, no tools left behind
  
• Handover with care instructions and warranties (where applicable)

At In House Plumbing, we believe the job isn’t done until you’re 100% satisfied. We take pride in leaving every bathroom not just beautiful, but clean, safe, and fully functional.

Key takeaway: A complete bathroom renovation follows a clear and structured journey—from design planning and demolition to plumbing upgrades, waterproofing, and final fit-off. By knowing what to expect at every step, you’ll feel more in control and more confident in the outcome.

Budgeting: How Much Does a Bathroom Renovation Cost in Sydney?

One of the first questions most homeowners ask is: how much does a bathroom renovation cost in Sydney? And the answer is—it depends. Renovation pricing can vary widely based on your goals, finishes, and the existing condition of your bathroom. The good news is, with smart planning and the right team, you can get great results at a range of price points.

Below, we’ll break down common cost tiers, what influences your budget, and how to get the most value from your investment—without sacrificing quality.

Cost Ranges: Budget, Mid-Range, and Premium

Here’s a general breakdown of typical bathroom renovation costs in Sydney:

Keep in mind that costs can increase if major plumbing work or structural changes are involved. It’s also important to factor in licensed trades, waterproofing, compliance certificates, and site preparation—these aren’t optional extras; they’re essential to a safe, long-lasting renovation.

Key Factors That Influence Costs

Several elements can push your bathroom renovation cost up or down. Here are the main ones to watch:

• Size of the bathroom – Larger spaces naturally require more materials and labour.
  
• Scope of work – Full gut-and-rebuilds cost more than surface upgrades.
  
• Plumbing changes – Rerouting pipes, moving drains, or replacing old plumbing adds to both complexity and cost.
  
• Choice of fittings and finishes – High-end tiles, tapware, and vanities can elevate the space—and the price tag.
  
• Accessibility – Bathrooms on upper levels or in older homes can involve additional labour for demolition and installation.
  
• Compliance requirements – Ensuring waterproofing and electrical meet NSW code may require upgrades or remediation.

Tips to Maximize Value and Avoid Hidden Fees

A smart renovation isn’t about cutting corners—it’s about making the most of your budget. Here’s how to plan wisely and avoid unexpected costs:

• Get a fixed-price quote from a reputable provider like In House Plumbing to avoid surprise expenses later.
  
• Invest in quality where it matters—plumbing, waterproofing, and tiling have the biggest impact on durability.
  
• Bundle services—working with one team for plumbing and renovations can streamline scheduling and reduce miscommunication.
  
• Choose timeless designs over trends if you’re renovating for long-term value or resale.
  
• Plan your renovation budget upfront, including a 10–15% buffer for contingency expenses.

Looking for bathroom upgrades on a budget? Consider refinishing rather than replacing where possible, or updating tapware and lighting to freshen up the space without a full rebuild

Key takeaway: Your bathroom renovation budget will depend on your goals, the size of the space, and the level of finish you’re aiming for. By understanding what drives costs—and where it’s smart to invest—you’ll be in a better position to plan with confidence and avoid costly surprises.

If you’re wondering how much value a renovated bathroom adds, the answer may pleasantly surprise you—especially if done with quality materials and thoughtful planning.

Timeline: How Long Does a Full Bathroom Renovation Take?

Understanding the timeline for a full bathroom makeover is just as important as knowing the cost. While every project is different, having a clear idea of how long things typically take will help you plan around the disruption, avoid rushed decisions, and ensure you’re working with a team that respects your time.

Whether you’re doing a complete bathroom renovation or a partial upgrade, the schedule depends on the size of the space, the scope of work, and the coordination between trades

Average Timelines for Full Renovations

A standard bathroom renovation timeline in Sydney looks like this:

Total Duration: 3–4 weeks (on average)

Keep in mind, complete bathroom renovations that involve structural changes or council approval may extend this timeframe. In contrast, partial renovations—like replacing fixtures or retiling without moving plumbing—can be done in as little as 1–2 weeks

Common Delays and How to Avoid Them

Even the most well-planned renovations can face unexpected hiccups. Some common delays include:

• Late product deliveries – Especially if you’ve ordered specialty tiles or imported fixtures
  
• Hidden plumbing issues – Corroded pipes, water damage, or non-compliant setups discovered during demolition
  
• Weather conditions – Can affect drying times for waterproofing and adhesives
  
• Permit or inspection delays – If council approval or compliance checks are required

How to stay on track:

• Order materials early to ensure they’re on-site when needed
  
• Build a buffer into your schedule (a few days) for unforeseen issues
  
• Work with a licensed plumber who can flag compliance issues early
  
• Choose a provider that communicates clearly and manages timelines proactively

The Value of Project Management

Coordinating trades, deliveries, inspections, and installations is no small task—and it’s where professional project management truly adds value. A renovation team that handles everything in-house will:

• Keep your bathroom renovation timeline realistic and transparent
  
• Schedule licensed plumbers, electricians, tilers, and waterproofers efficiently
  
• Minimise downtime between phases
  
• Update you regularly so you’re never left in the dark

At In House Plumbing, we don’t just do the plumbing—we manage the full renovation process from planning to clean-up, so you get a smooth, stress-free experience and a finished bathroom you’ll love.

Key takeaway: A full bathroom renovation typically takes 3 to 4 weeks—but smart planning, clear communication, and professional project management can make all the difference in keeping things on time and on budget.

Local Expertise: Why Hire a Licensed Bathroom Plumber in Sydney

When it comes to a bathroom renovation, the quality of the plumbing work is just as important as the design. Behind every beautiful new vanity or tiled shower is a network of pipes, drains, and fittings that need to function perfectly—not just on day one, but for years to come.

That’s why hiring a licensed bathroom plumber isn’t just recommended—it’s essential. Especially in Sydney, where local building codes, waterproofing standards, and property quirks make experience and expertise crucial for a smooth, compliant, and long-lasting renovation.

Legal and Safety Requirements in NSW

In New South Wales, any plumbing work must be carried out by a licensed plumber. This includes installing or moving water pipes, sewerage systems, gas fittings, and fixtures like toilets or showers. Failing to meet these legal standards not only puts your home at risk—it can also void warranties, impact resale value, and leave you with expensive repairs down the track.

A licensed bathroom plumber will:

• Ensure all plumbing and drainage work complies with the NSW Code of Practice
  
• Handle waterproofing requirements and ensure proper membrane installation
  
• Issue the necessary certificates of compliance (often required for council sign-off)
  
• Help you avoid fines or failed inspections due to unlicensed work

At In House Plumbing, our founder Isaac brings over 20 years of experience working in Sydney homes and understands exactly what’s required to meet both safety and compliance standards.

Local Property Knowledge

Every region has its quirks, and Sydney is no different. Older terraces, duplexes, and apartment buildings often come with outdated plumbing systems, narrow spaces, or tricky access. Newer builds might have different material standards or specific strata requirements.

By choosing a team with deep local property knowledge, you benefit from:

• Accurate assessments of existing plumbing and drainage infrastructure
  
• Solutions tailored to Sydney’s water pressure, weather, and building types
  
• Familiarity with council approval processes and documentation needs
  
• Expertise in navigating strata or heritage building constraints (where applicable)

We’ve worked on homes and commercial properties across the Inner West, North Shore, Eastern Suburbs, and beyond—so we know how to adapt and deliver consistent, high-quality results no matter the postcode

Clean, Respectful Work Practices

A bathroom renovation shouldn’t mean chaos in your home or business. From the first inspection to final clean-up, professional tradespeople should treat your space with care—keeping work areas tidy, protecting nearby surfaces, and ensuring minimal disruption to your routine.

At In House Plumbing, we’re known for:

• On-time arrivals and clear communication
  
• Respectful tradespeople who clean as they go
  
• Honest, upfront pricing with no hidden surprises
  
• A commitment to doing the job right the first time

It’s this customer-first mindset—combined with technical skill and local expertise—that makes us a trusted choice for Sydney bathroom renovations.

Key takeaway: When you’re planning a bathroom renovation, the right plumber makes all the difference. A licensed local expert ensures your renovation is safe, compliant, efficient, and stress-free—from the pipes behind the wall to the final polish on your fixtures.

Conclusion – Ready to Start Your Bathroom Renovation?

A bathroom renovation is one of the most rewarding ways to improve your home’s comfort, functionality, and value—but it’s also a project that demands careful planning, expert execution, and attention to detail at every stage.

From assessing your plumbing to ensuring waterproofing compliance and coordinating the many moving parts of a full renovation, having the right team makes all the difference. When you work with experienced professionals—especially a licensed bathroom plumber who understands Sydney homes—you get more than just great results. You get peace of mind.

At In House Plumbing, we combine over 20 years of local experience with honest advice, reliable service, and respectful workmanship that puts your needs first. Whether you’re just starting to plan or ready to dive in, we’re here to help.

Thinking about a bathroom upgrade? Let’s chat.