How Much Does it Cost to Renovate a House in Australia?

Renovation costs in Australia are all over the map, but as a rough guide, most quality projects fall somewhere between $4,500 and $6,500 per square metre. Where you land depends on how much you’re changing, the bones you’re working with, and the kind of finishes you’re dreaming of.

Unlike building fresh on a blank site, renovating means dealing with what's already there, including the surprises hiding behind walls and under floors. That’s where the real budget challenges kick in.

Before we look at room-by-room costs, let’s break down the typical tiers most projects fall into, from quick cosmetic makeovers to major structural overhauls.

Understanding the True Cost of Renovating a House

Renovation costs aren’t easy to pin down. They change depending on where you live, what you’re changing, and how high you want to go on the quality ladder.

Even with building costs jumping more than 30% since 2019, Australians are still renovating in droves. In fact, approved reno projects total around $1 billion every month, that’s nearly 40% of all residential construction.

Why? Because for many homeowners, updating the place they’re in feels like a smarter play than diving back into the property market.

Renovation Cost Tiers at a Glance

Most renovations fall into three broad categories, and where you land makes a big difference to your costs and timeline.

At one end, you’ve got surface-level cosmetic updates like painting and replacing fixtures. At the other, you’re looking at major structural work with architects, engineers, and council approvals in the mix. These figures are a guide only. Final costs always come down to the specifics of your home, the site conditions, and the team you choose to work with.

Here’s how the typical cost tiers break down:

Breaking Down Renovation Costs Room by Room

When you zoom in on each room, the renovation budget starts to make a lot more sense. Some spaces just cost more, and usually, it’s the ones with plumbing involved.

Kitchens and Bathrooms: Where Most of Your Budget Goes

Kitchens and bathrooms consistently claim the largest share of renovation budgets. This is because they require a complex coordination of high-cost elements: tiling, plumbing, electrical, bespoke joinery, and premium materials. While they are the most investment-heavy zones, they also deliver the most significant lifestyle boost and property value lift.

In the current market, a basic kitchen typically starts at $30,000 (or more). For a high-end, custom-designed kitchen, the total investment often starts at $80,000 and can easily exceed $150,000+. This figure reflects a premium level of finish where the appliances alone, often featuring top-tier brands, can account for $45,000 to $90,000 of the total.

Bathrooms follow a similar trajectory, starting around $25,000 for a modest upgrade, and climbing to $40,000+ with custom finishes and luxury fixtures.

The primary cost drivers remain premium materials like engineered stone or marble benchtops and bespoke cabinetry. However, in a renovation, labour and logistics are equally critical factors. Costs are often driven by the "double handling" required for wet areas, this includes meticulous demolition, stripping the space back to the frame, waste removal fees, and the subsequent coordination of specialised trades to begin the new fit-out from scratch.

Living Rooms, Bedrooms, and Laundries: Balancing the Budget

‘Dry’ areas like bedrooms and living rooms generally offer more flexibility than wet areas, but they still require a realistic budget for a high-quality finish. The primary investment drivers here are flooring, painting, and electrical work.

• Flooring: Options range from carpet or vinyl planks ($40–$80 per m²) to premium engineered timber, which can exceed $200+ per m².

• Painting: Professional painting for a single room typically ranges from $1,000 to $2,500, with a full-house often reaching $80,000 for a high-standard finish.

• Electrical: Simple electrical work usually begins at $1,000 to $2,500. It is important to realise that in the current market, this range often represents the baseline cost just to have a licensed electrician on-site to begin installations or upgrades.

A Note on Market Volatility: It’s important to remember that in the current climate, material and labor costs can change rapidly. These figures should be used as a broad guide for initial planning; the most accurate way to secure your budget is through a detailed feasibility study and up-to-date quotes from the project team.

The good news? These are the spaces where you can still make smart, strategic savings without sacrificing the overall aesthetic or comfort of your home.

Uncovering the Hidden Costs of Renovation

When you're planning a renovation, it's easy to focus on the builder's quote. But that number only covers the actual construction work. To build a realistic budget, you'll also need to account for professional fees, council approvals, and a contingency fund, all of which can add 25% or more to your total spend.

These costs often get overlooked, but they’re essential. Ignoring them is one of the most common reasons renovation budgets spiral beyond expectations.

What You'll Pay Before Building Starts

Before any building starts, you’ll need a team of professionals to get your plans ready, approved, and compliant.

• Architect: Fees typically range from 3.5% to 12% of your total construction cost. This investment covers the entire lifecycle of the project, from initial concept design to the creation of highly detailed construction drawings and managing the complex approvals process. Engaging an architect ensures your renovation is not only beautiful but also functional, compliant, and tailored specifically to your site's constraints.

• Structural Engineer: Essential for any major structural changes, such as removing internal walls or raising the home. In the current market, engineering fees typically range from $10,000 to $18,000+, depending on the complexity of the site.

• Council & Certification Fees: These encompass building applications, plumbing permits, mandatory inspections, and final sign-offs. In Brisbane, you should budget between $5,000 to $10,000 or more, depending on your location and project size. Costs can fluctuate based on your specific location and the overall scale of the project.

*Please Note: All figures provided in this guide are indicative only. Construction and consultancy costs are subject to individual project quotes, site-specific challenges, and ever-changing market conditions. We recommend a formal feasibility study before finalising any renovation budget.

Why You Need a Contingency Fund

This is the most important part of your budget that isn’t in the builder’s quote. A contingency fund is your safety net, set aside to cover the surprises that inevitably crop up during a renovation.

Unexpected costs happen, old wiring, hidden termite damage, or plans that don’t match what’s behind the walls. A healthy contingency fund is not 'extra' money; it's an essential part of the total project cost. We strongly advise clients to set aside 10-20% of their total construction budget for this purpose. For a $300,000 build, that’s a $30,000 to $60,000 buffer.

This fund gives you the freedom to solve problems without derailing the project or having to compromise on your vision. With a contingency buffer, you can solve problems without derailing the project. Without one, you’re often left cutting corners or scrapping parts of the plan altogether.

Matching Your Renovation Scope to Your Budget

A successful renovation starts with knowing what your budget can actually deliver. Define the scope first, then attach the right numbers to it.

A common mistake is to fixate on a budget number without first deciding what level of change you're truly aiming for. Are you planning a simple cosmetic refresh, a significant internal reconfiguration, or a full-scale structural extension?

What Different Budgets Can Achieve

To put this into perspective, let's look at some real-world examples. The cost of renovating varies significantly based on location, but these scenarios give you a tangible idea of what’s achievable at different price points.

For instance, in a competitive market like Brisbane, a budget under A$500,000 typically covers a comprehensive cosmetic refresh of an entire home, provided you don't alter its existing footprint. In stark contrast, a full knockdown and architecturally designed custom rebuild for a small four-bedroom home starts around A$1.8 million, while larger, high-end custom homes often require budgets beginning at A$2.5 million.

These figures reflect a broader trend: more homeowners are choosing to invest heavily in their current properties, partly because housing affordability has worsened and the time needed to save a deposit now sits at around 10.6 years.

Effective planning is everything. To ensure your project stays on track and within financial limits, consulting an ultimate renovating a house checklist will provide a solid framework. This helps you account for every detail, preventing scope creep and budget blowouts.

Ultimately, matching your scope to your budget is about making informed decisions. It might mean phasing your project, prioritising a spectacular kitchen now and refreshing the bedrooms later. It could also mean investing in expert guidance to maximise your spend. For complex projects, professional oversight is invaluable. Learning more about the benefits of dedicated project management for your home renovation can show how an expert can help keep your vision, timeline, and budget perfectly aligned from concept to completion.

How to Create Your Personalised Renovation Budget

Now that you have a clearer picture of the costs, it’s time to turn that information into a detailed, personalised budget. This is where abstract numbers become a concrete financial plan for your project.

Think of it less as guesswork and more as following a recipe. You wouldn’t start cooking without knowing your ingredients and measurements, and you shouldn’t start renovating without a clear financial blueprint.

Start with Your Project Scope

The very first step is to get brutally honest about what you want to achieve. This means separating the absolute essentials from the desirable extras. This clarity is the foundation of a budget that won’t spiral out of control.

Pull out a notepad and create two distinct lists: ‘must-haves’ and ‘nice-to-haves’.

• Must-Haves: These are your non-negotiables. Think fixing a leaking roof, creating a functional kitchen layout, or adding a much-needed bedroom for a growing family. These items form the core of your renovation.

• Nice-to-Haves: This is your wish list if the budget allows. It could be heated bathroom floors, a high-end stone benchtop, or that designer tapware you’ve been eyeing off. These are the first things to go if costs need trimming.

Research Local Costs and Get Quotes

With your scope defined, it’s time to hunt for real-world numbers. Generic online calculators can give you a rough idea, but costs for materials and labour vary significantly.

Start by researching your key materials. Visit local suppliers for flooring, tiles, and fixtures to get quotes. For the build itself, the best approach is to get multiple, detailed quotes from reputable builders. Three gives you a solid average and helps you spot any outliers that are either too high or suspiciously low.

When the quotes arrive, don’t just skip to the final number. A low bid might look tempting, but it could be missing crucial details that will reappear as costly variations down the track. A well-structured budget is a core part of staying financially healthy during a renovation. For a deeper dive, you can learn more about how to manage your budget in residential home design in our detailed blog.

Compare Your Builder Quotes Effectively

Comparing quotes is about more than just the price; it’s about understanding what’s included and, just as importantly, what’s been left out. A good quote should break down costs for each stage of the project, from demolition right through to the final finishes.

Here’s a practical checklist to help you compare builder quotes like a pro:

1. Check for a Detailed Scope of Works: Does the quote clearly list every single task and material? Vague lines like "install new bathroom" are a red flag. It should specify the exact model of taps, the type of tiles, and the full scope of plumbing work.

2. Verify Inclusions vs. Exclusions: Look for what’s missing. Is demolition and rubbish removal covered? What about professional fees, council permits, or the final coat of paint? These exclusions can add thousands to your final bill if they’re not accounted for.

3. Provisional Sums and Prime Costs: A Provisional Sum (PS) is an educated guess for an item whose final cost is unknown. A Prime Cost (PC) is an allowance for a specific item you’ll choose later. Lots of provisional sums and prime costs can introduce serious budget uncertainty, so pay attention to how many allowances your quote relies on.

4. Confirm Timelines and Payment Schedules: A professional quote will include an estimated project timeline and a clear schedule of progress payments. Make sure this aligns with your expectations and financial planning.

By meticulously comparing your quotes, you can choose a builder who not only offers a fair price but also demonstrates transparency and a thorough understanding of your project. This diligence is your best defence against unexpected costs and ensures your budget is built on solid ground.

Common Questions About Renovation Costs

As you get closer to finalising your plans, a few key questions naturally start to surface. Moving beyond the big-picture numbers means getting practical, knowing the smart ways to save, when to repair versus rebuild, and what to expect from the professionals you hire.

This final section tackles the most common concerns we hear from homeowners. Think of it as a practical FAQ to reinforce what we’ve covered and give you that extra bit of confidence as you move forward.

How Can I Save Money Without Cutting Corners?

Saving money on your renovation is about being strategic, not just cheap. The goal is to reduce costs without compromising the quality of the things that truly matter, the structural and functional elements of your home.

It all comes down to smart savings that won’t create expensive headaches later.

• Strategic DIY: If you have the skills and time, tackling tasks like interior painting, demolition, or landscaping can save you thousands in labour. But be honest with yourself about your abilities. A botched job can cost far more to fix than hiring a professional in the first place.

• Source Materials Wisely: Keep an eye out for sales on tiles, flooring, and fixtures at major suppliers. You can also find high-quality alternatives to premium brands; many mid-range products offer excellent durability and style for a fraction of the cost.

• Prioritise Your Spending: Put your money into the ‘bones’ of the house, structural work, insulation, waterproofing, and plumbing. For cosmetic finishes like tapware, light fittings, or door handles, you can choose more budget-friendly options that are easy to upgrade in a few years.

Is It Cheaper to Renovate or Rebuild?

This is a major fork in the road, and the right answer really depends on the condition of your existing house and the scale of your ambitions. There’s no one-size-fits-all solution here.

If your home’s foundation, frame, and overall structure are sound and your layout changes are relatively minor, renovating is almost always the more cost-effective path. You’re working with the existing structure, which saves a huge amount on materials and labour.

However, if the house has serious structural problems, extensive termite damage, or you’re planning a complete reconfiguration of the floor plan, a knockdown-rebuild can sometimes be the smarter financial choice. A rebuild avoids the costly surprises often hidden in old walls and gives you budget certainty, though it does require a much larger initial investment and a longer timeline.

What Is the Difference Between an Architect and a Draftsman?

Both professionals can design your renovation, but their qualifications, the scope of what they do, and their fees are different.

An architect holds a university degree and is a state-registered professional. They are often brought on to manage the entire project, from the first sketch and council approvals right through to overseeing the contract during construction.

A draftsman typically has a diploma-level qualification and focuses on producing the technical drawings needed for council approval and construction.

For complex, high-end architectural homes or challenging heritage renovations, an architect’s deep expertise is often the best fit. For more straightforward extensions or internal reconfigurations where a high degree of design originality isn't the primary goal, an experienced building designer can be a very effective and more budget-friendly choice.

At Invilla Architecture, we guide clients through every stage of the design and renovation process. If you’re ready to transform your home with clarity and confidence, we invite you to learn more about our architectural services. Explore Our Renovation and New Build Services at invilla.com.au