How Much Does It Cost to Renovate a House in Australia in 2026?
Renovating a house in Australia in 2026 can cost anywhere from around $50,000 for a limited renovation to $500,000 or more for a complete high-end transformation. The final house renovation cost Australia homeowners pay depends on the size of the property, location, materials, labour, design complexity and whether structural work is required. For a mid-range full renovation, current Australian cost guides indicate approximately $2,800–$4,500 per square metre in metropolitan areas. A three-bedroom full renovation can commonly reach $200,000–$500,000 depending on the scope. Your Property Guide
The average house renovation cost is difficult to define because a cosmetic refresh is completely different from a structural renovation. Kitchen and bathroom upgrades, for example, can consume a significant part of the budget, while changing walls, relocating plumbing, upgrading electrical systems or restoring an old or heritage property can increase renovation costs Australia-wide. This renovation cost guide explains typical house renovation prices Australia homeowners can expect, including labour, materials, individual rooms, city differences, budgeting strategies and practical ways to renovate without unnecessarily increasing your home renovation cost Australia.
What Is the Average House Renovation Cost in Australia in 2026?
The average cost to renovate a house Australia homeowners should plan for varies according to the level of renovation. A basic cosmetic project may involve painting, flooring, lighting and minor repairs, while a complete home renovation Australia project can involve demolition, new kitchens and bathrooms, electrical and plumbing upgrades, structural changes and premium finishes. A useful starting point is to calculate the renovation cost per square metre Australia-wide, then adjust the figure according to your property's condition and location. Current 2026 guides put a mid-range full renovation around $2,800–$4,500/m² in metro markets. Your Property Guide
Budget House Renovation Australia
A budget house renovation Australia project focuses on improving appearance and functionality without changing the property's basic structure. This approach can include repainting walls, replacing worn flooring, updating lighting, refreshing cabinetry and replacing selected fixtures. Keeping the existing kitchen and bathroom layouts is one of the easiest ways to control the cost to renovate a home Australia homeowners face.
For homeowners working with limited funds, prioritising high-impact improvements is more effective than trying to renovate every room simultaneously. Cheap house renovation ideas Australia homeowners can consider include repainting, updating handles, replacing light fittings, refinishing existing cabinets and improving flooring. These improvements can make an older property feel substantially newer without requiring major structural work.
Repaint walls and ceilings
Replace outdated light fittings
Refinish rather than replace cabinetry
Upgrade door handles and hardware
Improve flooring in high-traffic areas
Mid-Range Home Renovation Cost Australia
A mid-range renovation generally involves more substantial improvements to kitchens, bathrooms, living spaces and bedrooms. Homeowners may replace cabinetry, benchtops, flooring, fixtures, appliances, lighting and selected windows while retaining most of the existing floor plan. This is often the most practical level for people seeking a noticeable improvement without undertaking a complete rebuild.
The home renovation cost Australia homeowners pay at this level can vary considerably depending on the property's size and location. A three-bedroom home with several renovated rooms can move into the six-figure range, particularly in Sydney or Melbourne. Good planning, competitive quotes and controlled material selections can help prevent the renovation budget of Australia from expanding unnecessarily.
Upgrade the kitchen and bathroom
Replace flooring throughout key areas
Improve lighting and electrical systems
Repaint internal and external surfaces
Upgrade selected doors and windows
Premium House Renovation Prices Australia
Premium house renovation prices Australia increase when homeowners choose custom joinery, premium stone, designer fixtures, architectural finishes and extensive structural modifications. High-end renovations often involve opening up living areas, changing the floor plan, upgrading building services and creating bespoke kitchens and bathrooms. Premium materials can also substantially increase the renovation materials cost Australia homeowners need to allow for.
A premium project should be approached with a detailed scope of works and professional cost planning. Even attractive design ideas can become expensive when multiple trades are required. For this reason, homeowners should establish their priorities before construction begins and maintain a contingency reserve for unexpected work, particularly in older properties.
Custom cabinetry and joinery
Premium stone or porcelain surfaces
Designer bathroom fixtures
Architectural lighting
Extensive structural alterations
Full House Renovation Cost Australia
A full house renovation cost Australia estimate can vary dramatically because "full renovation" may mean anything from updating every surface to completely rebuilding the internal layout. A current 2026 guide places a mid-range three-bedroom full renovation broadly around $200,000–$500,000, demonstrating how wide the possible range can be. Your Property Guide
For a complete project, homeowners should calculate each room separately and then add professional fees, demolition, approvals, site preparation, services and contingency. A renovation cost calculator Australia homeowners use online can provide a starting estimate, but a site-specific quotation remains essential before committing to a major renovation.
Define the complete renovation scope
Price every room separately
Include demolition and waste removal
Allow for professional and approval fees
Keep a contingency fund
House Renovation Cost Breakdown Australia
A house renovation cost breakdown Australia homeowners can use should separate construction, materials, labour, professional services and unexpected expenses. Kitchens and bathrooms often consume a disproportionate share of the budget because they require multiple trades, cabinetry, plumbing, electrical work, waterproofing, tiling and fixtures. Structural renovation cost can also rise quickly when walls, roofs, foundations or major building elements are altered. Labour is another major consideration because renovation projects require several specialised trades working in sequence. Understanding where the money goes makes it easier to identify savings without compromising important work. A detailed budget should therefore include both visible finishes and hidden costs such as demolition, waste removal, site protection, approvals and contingency.
Renovation Labour Costs Australia
Renovation labour costs Australia homeowners encounter depend on the trade, location, project complexity and duration. Builders, electricians, plumbers, tilers, painters, carpenters and cabinetmakers may all contribute to one renovation. The more trades involved, the more important project coordination becomes.
Labour should not automatically be treated as an expense to minimise. Skilled workmanship is particularly important for electrical work, plumbing, waterproofing and structural modifications. Paying for qualified professionals can reduce defects, rework and expensive repairs later. Your renovation budget Australia should therefore distinguish between genuine cost savings and risky shortcuts.
Compare several detailed quotes
Check trade licences where required
Confirm exactly what labour includes
Ask about project supervision
Avoid choosing purely on lowest price
Renovation Materials Cost Australia
The renovation materials cost Australia homeowners face can vary enormously according to finish level. Laminate cabinetry, standard tiles and entry-level fixtures can keep costs controlled, while natural stone, custom joinery, premium appliances and imported finishes can substantially increase the final price.
Material selection should be based on durability as well as appearance. Spending more on heavily used surfaces may be worthwhile, while decorative items can often be purchased at lower prices. A clear schedule of finishes helps prevent material substitutions and unexpected increases after construction starts.
Compare laminate and stone surfaces
Select durable flooring
Price appliances before ordering cabinetry
Compare tile ranges carefully
Confirm delivery and installation costs
Structural Renovation Cost
Structural renovation cost is usually higher than cosmetic renovation because it can require engineering, demolition, temporary support and specialist construction. Removing load-bearing walls, changing roof structures, altering foundations or extending the building can significantly increase the total building renovation costs Australia homeowners need to consider.
Structural changes should always be planned before cosmetic finishes are selected. Moving walls after electrical, plumbing and plastering work has begun can create unnecessary rework. Professional assessment is especially important for older houses where previous alterations may not be obvious.
Obtain structural advice where required
Identify load-bearing walls
Check foundations and major building elements
Plan structural work before finishes
Include engineering and approval costs
Renovation Contingency and Hidden Costs
A renovation budget should never consist only of visible construction costs. Older houses can reveal damaged wiring, deteriorated plumbing, moisture problems, asbestos-containing materials or structural defects once walls and floors are opened. These discoveries can quickly increase the cost of renovating a house in Australia.
A practical approach is to reserve approximately 10–15% for unexpected issues, with additional allowance for changes in scope. Current Australian renovation guidance similarly recommends contingency for unforeseen problems. Your Property Guide This protects the project from being stopped simply because one unexpected repair appears.
Allow a 10–15% contingency
Inspect older services before renovation
Check for moisture problems
Confirm demolition requirements
Keep emergency funds separate
Renovation Cost Per Square Metre Australia
The renovation cost per square metre Australia homeowners use for early budgeting depends heavily on renovation quality and scope. Current 2026 guidance suggests approximately $2,800–$4,500/m² for a mid-range full renovation in metropolitan areas, although cosmetic renovations can be much cheaper and premium projects can exceed these figures. Your Property Guide Cost per square metre is therefore useful for comparing projects but should not be treated as a final quote.
For example, a 150m² house renovated at $3,000/m² would produce a theoretical construction allowance of $450,000. However, not every renovation needs every square metre treated equally. Kitchens and bathrooms cost more per square metre than bedrooms or living rooms, which is why room-by-room costing produces a more realistic renovation cost guide Australia homeowners can use.
How Much Does It Cost to Renovate a 3 Bedroom House in Australia?
The answer to how much does it cost to renovate a 3 bedroom house in Australia depends more on scope than bedroom count. A cosmetic renovation may cost considerably less than a full renovation involving the kitchen, bathrooms, flooring, electrical systems, windows and structural changes. Current 2026 guidance places a mid-range three-bedroom full renovation broadly around $200,000–$500,000. Your Property Guide
For a three-bedroom home, homeowners should price the kitchen, bathrooms, bedrooms, living areas and services individually before combining them. This provides a clearer understanding of the average cost to renovate a house Australia homeowners may actually encounter and makes it easier to remove lower-priority items if the budget becomes tight.
Cosmetic refresh: substantially lower cost
Kitchen upgrade: major budget component
Bathroom upgrades: high trade density
Flooring: varies by material
Full renovation: potentially $200k–$500k+
How Much Does It Cost to Renovate a 4 Bedroom House in Australia?
The question how much does it cost to renovate a 4 bedroom house in Australia cannot be answered using one fixed figure because the home's floor area, condition and renovation scope matter more than the number of bedrooms alone. A larger four-bedroom property will generally require more flooring, painting, lighting and potentially more windows and doors.
A complete four-bedroom renovation can move well into the several-hundred-thousand-dollar range when kitchens, bathrooms, living areas, services and structural elements are included. Using a renovation cost per square metre provides a useful first estimate, but individual rooms should then be priced separately for greater accuracy.
Measure the complete floor area
Separate cosmetic and structural work
Price additional bathrooms
Include larger flooring requirements
Add contingency to the final budget
Renovation Cost for Different House Sizes
Smaller homes can sometimes have lower total renovation costs, but they are not always cheaper per square metre. Kitchens and bathrooms have fixed trade requirements regardless of size, meaning a compact property can still require significant expenditure. Large houses generally require more materials, labour and finishing work.
When comparing home improvement costs Australia homeowners should therefore consider both total project cost and cost per square metre. A $150,000 renovation may be substantial for a small home but comparatively limited for a large property requiring extensive structural and service upgrades.
Compare total project costs
Calculate cost per square metre
Consider room count
Account for property condition
Separate fixed and variable costs
Using a House Renovation Cost Calculator Australia
A house renovation cost calculator Australia homeowners use can help establish a preliminary budget before requesting professional quotes. Online calculators typically allow users to select room types, finish levels, sizes and optional features. Some current Australian calculators provide separate estimates for kitchens and bathrooms. Going Rate+1
However, calculator results should be viewed as planning figures rather than guaranteed prices. Site access, structural conditions, regional labour rates, material choices and hidden defects can substantially change the final quotation. The best approach is to use the calculator for an initial range and then validate it with detailed local quotes.
Enter accurate room measurements
Select realistic finish levels
Include optional features
Compare calculator results with quotes
Keep contingency outside the estimate
Room-by-Room Home Renovation Prices Australia
Understanding home renovation prices Australia homeowners face by room makes the overall budget easier to manage. Kitchens typically require cabinetry, appliances, benchtops, plumbing and electrical work, while bathrooms require waterproofing, tiling and multiple specialist trades. Living rooms and bedrooms are generally less expensive unless structural changes, premium flooring or custom joinery are introduced. Laundries can also become expensive when plumbing and cabinetry are replaced. Current 2026 Australian guides put kitchen renovation costs around $20,000–$45,000 for many projects, while bathroom renovations commonly fall around $15,000–$28,000 depending on scope. Going Rate+1
Kitchen Renovation Cost Australia
The kitchen renovation cost Australia homeowners should expect varies significantly according to cabinetry, benchtops, appliances and layout changes. Current 2026 sources place many kitchens around $20,000–$45,000, with budget projects starting lower and premium custom kitchens exceeding $50,000. Going Rate Other Australian cost guides put trade-built kitchens at approximately $23,000–$49,000, illustrating why quotes can differ. Renova Build
Keeping plumbing and appliances in their current positions is one of the simplest ways to control the kitchen remodel cost Australia homeowners face. Cabinetry and benchtops are usually among the largest expenses, followed by appliances and installation trades.
Budget kitchen: roughly $12,000–$18,000
Mid-range kitchen: roughly $25,000–$45,000
Premium kitchen: $50,000+
Keep plumbing in place where possible
Compare cabinetry and benchtop options
Bathroom Renovation Cost Australia
The bathroom renovation cost Australia homeowners encounter depends heavily on waterproofing, tiling, fixtures and plumbing. Current guides commonly place standard bathroom renovations around $15,000–$28,000, although premium or reconfigured bathrooms can cost substantially more. Going Rate Another 2026 guide based on Archicentre Australia data gives approximately $17,500–$35,000 for a bathroom or ensuite fit-out. Renova Build
Moving plumbing is often one of the biggest cost increases. Premium tiles, custom vanities, frameless screens, freestanding baths and underfloor heating can also increase the bathroom remodel cost Australia homeowners pay. Waterproofing should never be treated as an area for risky savings.
Budget refresh: approximately $10,000–$15,000
Standard renovation: approximately $15,000–$28,000
Premium projects: $35,000+
Keep plumbing positions where possible
Budget carefully for waterproofing and tiling
Living Room Renovation Cost Australia
A living room renovation cost Australia estimate is generally lower than a kitchen or bathroom because there are fewer specialist services. A cosmetic living-room update may involve painting, flooring, lighting, window treatments and built-in storage. Costs rise when walls are removed, ceilings changed or custom cabinetry installed.
Living rooms can provide excellent opportunities for affordable improvements because visual impact does not always require structural work. Repainting, new flooring, lighting and improved storage can modernise the space while keeping the cost to renovate a home Australia homeowners pay under control.
Repaint walls and ceilings
Replace outdated flooring
Improve lighting
Add practical storage
Upgrade window treatments
Bedroom and Laundry Renovation Cost Australia
A bedroom renovation cost Australia homeowners face is generally influenced by flooring, painting, wardrobes, lighting and electrical work. Bedrooms usually require fewer specialist trades, making them easier to renovate within a controlled budget. Custom wardrobes can become a significant additional expense.
The laundry renovation cost Australia homeowners pay can be higher than expected because plumbing, cabinetry, benchtops, waterproofing and appliance connections may all be involved. Current 2026 Australian renovation data indicates laundry fit-outs can sit around $10,000–$19,000 depending on specification. Renova Build
Refresh bedroom paint
Upgrade flooring
Improve wardrobe storage
Replace laundry cabinetry
Retain existing plumbing where possible
How Much Does It Cost to Renovate a House in Sydney, Melbourne and Brisbane?
Location has a major influence on renovation costs Australia homeowners experience. Labour availability, builder demand, site access, transport, property type and local construction conditions can all influence quotes. Sydney is generally one of Australia's higher-cost renovation markets, while Melbourne and Brisbane can also have substantial costs depending on the suburb and project's complexity. City-specific pricing should therefore be used as an adjustment to a national estimate rather than a guaranteed price.
What's The Damage?
The following city sections provide practical planning guidance rather than fixed quotes. A renovation company should inspect the property before confirming the final price, particularly when the project involves structural modifications, older buildings or major service upgrades.
How Much Does It Cost to Renovate a House in Sydney?
For homeowners asking how much does it cost to renovate a house in Sydney, the answer is usually influenced by high labour demand, site accessibility, property type and the age of the home. Premium suburbs, heritage properties and difficult sites can produce significantly higher quotations than straightforward projects.
Sydney renovation costs can therefore sit toward the upper end of national ranges, especially for full-house renovations. Kitchen and bathroom renovations may also attract higher quotes where access is difficult or premium materials and custom trades are involved.
Expect potentially higher labour rates
Consider site accessibility
Budget for premium finishes carefully
Check heritage requirements where relevant
Obtain multiple detailed Sydney quotes
How Much Does It Cost to Renovate a House in Melbourne?
When considering how much does it cost to renovate a house in Melbourne, homeowners should consider the property's age, architectural style and location. Melbourne contains many older homes where extensions, layout changes and restoration can create additional costs.
The home renovation cost Australia market in Melbourne can vary considerably between a cosmetic update and a complete renovation. Period properties may require specialist trades and materials, while straightforward modern homes can be easier to renovate within a predictable budget.
Inspect older properties carefully
Allow for restoration work
Check planning requirements
Compare builder scopes carefully
Include contingency for hidden defects
How Much Does It Cost to Renovate a House in Brisbane?
Homeowners asking how much does it cost to renovate a house in Brisbane should consider local labour, weather-related construction requirements, property access and the home's existing condition. Queensland homes can have distinctive construction styles that influence renovation methods and costs.
A Brisbane renovation budget should also account for ventilation, outdoor connections, roofing and other property-specific requirements where relevant. The final house renovation prices Australia homeowners see locally will depend on the exact scope rather than the city alone.
Assess the existing building structure
Consider weather-related requirements
Check drainage and external areas
Price outdoor improvements separately
Obtain local builder quotes
Comparing Australian Renovation Markets
Sydney, Melbourne and Brisbane should not be compared solely by headline renovation prices. A larger factor is the actual specification of the renovation. A basic kitchen in one city may cost less than a premium kitchen in another, while a difficult-access property can produce an unusually high quote.
For accurate renovation costs Australia comparisons, homeowners should request identical scopes from several contractors. Using the same drawings, finish schedule and inclusions makes it much easier to determine whether one quote is genuinely cheaper or simply excludes important work.
Compare identical scopes
Check inclusions and exclusions
Compare labour assumptions
Review material specifications
Ask about variations
Old House, Heritage House and Complete Home Renovation Costs
An old house renovation cost can be considerably higher than renovating a newer property because older buildings may contain outdated wiring, plumbing, damaged materials, structural movement, moisture problems or asbestos-containing products. Heritage properties can introduce additional planning requirements and restrictions. A heritage house renovation cost should therefore include specialist advice before construction begins. Complete renovations also require more coordination because multiple systems are upgraded simultaneously. Homeowners should inspect the property thoroughly, determine which elements can be retained and establish whether structural, planning or heritage requirements apply before finalising the renovation budget.
Old House Renovation Cost Australia
The old house renovation cost Australia homeowners face depends heavily on what is discovered after demolition. Older properties can require rewiring, plumbing replacement, roof repairs, insulation upgrades, structural repairs and restoration of original elements.
The apparent cost of an old house can therefore be misleading. A property may look suitable for a modest renovation but require extensive upgrades once walls, floors and ceilings are opened. A larger contingency is particularly important when renovating older homes.
Inspect electrical systems
Check plumbing condition
Investigate moisture damage
Assess roof and foundations
Test for hazardous materials where appropriate
Heritage House Renovation Cost Australia
A heritage house renovation cost Australia homeowners face can increase when original architectural features must be preserved. Heritage requirements may influence external changes, windows, façades, roof elements and other significant features.
Before renovating, homeowners should determine whether the property is heritage-listed or subject to local heritage controls. Design decisions should then account for both preservation and modern functionality. Specialist architects, designers and trades may be appropriate for complex heritage projects.
Check heritage listing status
Understand local restrictions
Preserve significant features
Use suitable restoration materials
Obtain specialist heritage advice
Complete Home Renovation Australia
A complete home renovation Australia project normally involves several interconnected areas rather than one isolated room. It can include kitchens, bathrooms, bedrooms, living areas, flooring, painting, electrical systems, plumbing and structural changes.
The advantage of renovating the whole house together is better design consistency and potentially more efficient trade coordination. The disadvantage is a much larger upfront budget and greater risk of delays. A detailed construction schedule and staged payment plan are therefore essential.
Prepare a whole-house scope
Establish project priorities
Coordinate all major trades
Plan temporary accommodation if needed
Protect funds for unexpected work
Building Renovation Costs Australia
Building renovation costs Australia homeowners face increase when projects include extensions, structural alterations, roof changes or significant rebuilding. These projects may involve architects, engineers, certifiers, surveyors and approval processes in addition to builders and trades.
The more complex the building work, the less reliable a simple per-square-metre estimate becomes. Structural and professional costs should be calculated separately before comparing construction quotations.
Include design and engineering fees
Confirm approval requirements
Price demolition separately
Allow for structural work
Compare complete project scopes
How to Reduce Your Renovation Budget Without Sacrificing Quality
A realistic renovation budget Australia homeowners can maintain starts with clear priorities. Not every element needs to be premium, and not every room needs to be renovated simultaneously. Retaining existing plumbing locations, choosing durable mid-range materials, refinishing suitable surfaces and obtaining several comparable quotations can significantly reduce unnecessary expenditure. Cheap house renovation ideas Australia homeowners can use include painting, changing hardware, upgrading lighting and improving storage. The goal is not simply to spend less; it is to spend money where it produces the greatest functional and visual improvement. A controlled budget house renovation Australia strategy can therefore achieve a substantial transformation without turning every design decision into a premium-cost item.
Keep the Existing Layout
One of the most effective ways to reduce renovation costs is to keep plumbing, electrical points and walls in their existing positions. Moving sinks, toilets, showers, appliances and drainage often requires additional trades and construction work.
This strategy is particularly useful for kitchens and bathrooms. A renovation can still look completely different through new cabinetry, finishes, lighting and fixtures without requiring a complete change to the floor plan.
Keep kitchen plumbing locations
Retain bathroom fixture positions
Avoid unnecessary wall removal
Reuse suitable electrical locations
Focus spending on visible improvements
Choose Materials Strategically
Renovation materials can account for a substantial part of the final cost. Choosing mid-range products does not necessarily mean choosing poor quality. Many durable materials provide excellent appearance and performance without the premium attached to designer ranges.
Homeowners should spend more on high-use or difficult-to-replace elements and save on decorative items that can be upgraded later. This approach makes the renovation cost per square metre more manageable.
Compare several material suppliers
Use durable mid-range finishes
Avoid unnecessary premium upgrades
Reuse suitable existing materials
Check installation costs before purchasing
Renovate in Stages
Staged renovation can make a large project easier to finance. Instead of renovating every room simultaneously, homeowners can prioritise kitchens, bathrooms and areas requiring urgent repairs before moving onto bedrooms and cosmetic improvements.
However, staged work should be planned carefully. If future renovations require removing newly installed finishes, the apparent saving can disappear. A master renovation plan helps ensure each stage supports the next.
Prioritise urgent repairs
Renovate high-impact rooms first
Plan future stages early
Avoid duplicating construction work
Maintain a long-term renovation plan
Compare Builder and Trade Quotes
Getting multiple quotes is important, but homeowners should compare more than the bottom-line figure. One builder may include demolition, waste removal, painting or project management while another may exclude these items.
Ask contractors to provide detailed scopes and identify allowances and provisional sums. This makes the average house renovation cost easier to compare and reduces the risk of unexpected variations during construction.
Obtain multiple written quotations
Compare identical specifications
Check exclusions carefully
Ask about provisional sums
Confirm variation procedures
Frequently Asked Questions
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A full renovation can range from roughly $200,000 to $500,000 for a mid-range three-bedroom home, while smaller cosmetic projects can cost considerably less. Your Property Guide
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There is no single national average, but mid-range full renovations commonly use approximately $2,800–$4,500 per square metre as an initial metropolitan planning range. Your Property Guide
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A typical kitchen renovation can cost approximately $20,000–$45,000, while budget kitchens may cost less and premium custom kitchens can exceed $50,000. Going Rate
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Many 2026 bathroom renovations fall around $15,000–$28,000, although premium, larger or reconfigured bathrooms can cost substantially more. Going Rate
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A mid-range full renovation of a three-bedroom house can broadly cost $200,000–$500,000, depending on location, finishes, structural work and the property's existing condition. Your Property Guide
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A four-bedroom renovation can exceed a three-bedroom project because of its larger floor area, additional rooms, materials and labour, particularly when the entire house is renovated.
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For a mid-range full metropolitan renovation, current 2026 guidance suggests approximately $2,800–$4,500 per square metre, although premium projects can exceed this range. Your Property Guide
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Sydney renovation costs vary by suburb, access, property condition, labour and specification, with complex or premium renovations generally sitting toward the upper end of national cost ranges.
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Melbourne renovation prices depend on property age, architectural style, labour, materials and scope, with older and heritage homes potentially requiring additional restoration and professional costs.
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Brisbane renovation costs depend on property type, condition, project size, materials, labour and structural requirements, so local quotations are needed for an accurate budget.
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Painting, replacing hardware, upgrading lighting, refinishing cabinets, improving storage and selectively replacing flooring can deliver significant visual improvements without major structural expenditure.
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A contingency of around 10–15% is commonly recommended for unexpected problems, with older properties potentially requiring additional allowance because hidden defects are more likely. Your Property Guide
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Structural changes, moving plumbing, premium cabinetry, stone surfaces, custom joinery, extensive electrical work, difficult site access and unexpected defects can significantly increase renovation prices.
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It can be because old homes may require electrical, plumbing, structural, moisture, roofing or hazardous-material investigations and repairs that are less common in newer properties.
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A renovation calculator is useful for an initial planning range, but it cannot account for every property-specific condition, trade requirement, site constraint or hidden defect.
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Keep existing layouts where possible, compare detailed quotes, choose materials strategically, define the scope before construction and maintain a separate contingency fund for unexpected expenses.