How much does a Passive House cost in Melbourne?
The honest answer is that it depends on your design, and any builder who gives you a number before seeing your plans is guessing. This page explains what actually drives the cost, where the extra money goes, what you get back, and how to find out your real number before you fall in love with a design.
A Passive House in Melbourne usually costs a bit more to build than a standard 7 star home, and our honest guess is somewhere between 1 and 20 percent more depending on the design. Sometimes it costs less, when the design does away with a big heating and cooling system. The real cost depends on size, shape, site, foundations, windows and finishes, so the only reliable way to know is to price your own design early, which is exactly what a Carland Constructions budget alignment study does.
Why you won't find a price per square metre here
We get asked for a square metre rate more than any other question, and we understand why. It feels like a simple way to work out if a project is possible. The trouble is that a single rate does more harm than good, for four reasons.
A rate blends small and large homes, flat and sloping sites, simple and complex designs. Your home will sit somewhere in that spread, and the rate can't tell you where.
A kitchen, a bathroom, a heat pump and a ventilation system cost much the same whether the house is big or small, so a compact home always looks dearer per square metre even when it costs less overall.
One builder's rate includes site costs, landscaping and GST. Another's doesn't. Two numbers that look the same can be a long way apart once you read the fine print.
An early rate becomes the budget in your head, and every honest price after that feels like bad news. We'd rather give you one number that's actually about your project.
What we do instead. We price your actual concept design against our own build data from comparable Carland Constructions projects, and give you one honest range that answers a single question: does your budget match your brief?
How it worksEight things that move the price of any build
None of these are special to Passive House. They move the price of every home, which is why they matter far more than the certificate does. Tap through each one to see what pushes the cost up and what keeps it in check.
Size
Every square metre you build has to be framed, insulated, sealed, heated, cleaned and maintained for the life of the house. Building smaller and better is the biggest lever most people have, and a well planned smaller home often lives bigger than a poorly planned large one.
- Rooms added just in case
- Long hallways and wasted circulation
- A second living area that rarely gets used
- Designing around how you actually live
- Rooms that do more than one job
- Spending the savings on quality instead
Shape
A simple, compact shape costs less to build and performs better. Every corner, step and change in roof line adds framing, membrane, tape, flashings and labour, and creates another spot where heat can leak and water can get in.
- Lots of corners and setbacks
- Complicated roof shapes
- Cantilevers and floating elements
- A compact, simple form
- A simple roof with fewer junctions
- Interest from materials and light rather than shape
Site and access
Inner Melbourne blocks are often tight, with neighbours close by, narrow access and no room to store materials. That adds time and cost to deliveries, cranes, scaffolding and waste, and planning overlays can add more steps again.
- Sloping blocks and retaining walls
- No side or rear access
- Heritage and planning overlays
- A builder walking the site early
- Planning deliveries and storage up front
- Designing to suit the site, not fighting it
Foundations
You can't see it, and you won't know the cost until the soil is tested. Reactive clay, fill and nearby trees are common across Melbourne's west and north, and they can change the slab design and the price more than most people expect.
- Highly reactive or filled soil
- Big trees close to the building
- Steep sites that need piers or piles
- Getting a soil test before design goes far
- Engineering that suits the soil from day one
- Insulating the slab as part of the design, not an afterthought
Windows and doors
High performance windows are one of the biggest single costs in a Passive House, and the size, number and direction of the glass matter as much as the window itself. The right window in the right spot does a lot of work, and the wrong one costs you twice, once to buy and again to cool.
- Large west facing glass
- Oversized sliders and custom shapes
- More openings than the design needs
- Most of the glass facing north
- Standard sizes where they work
- Fewer, better placed windows
Services
A Passive House needs heat recovery ventilation, but it needs far less heating and cooling than a standard home. The savings come when the systems are sized to the modelled demand of a house that barely needs them, rather than a house that leaks.
- Ducted systems sized like a standard home
- Several systems doing overlapping jobs
- Services designed late, after the walls are drawn
- Small, simple systems sized from the model
- All electric, with no gas connection
- Planning duct runs while the design is on paper
Fit out and finishes
Kitchens, joinery, tiles, tapware and lighting are where budgets blow out on any build, Passive House or not. They're also the easiest things to change, upgrade or add later, which makes them the best place to find savings if the numbers are tight.
- Custom everything
- Choices left open until construction
- Large allowances for things not yet picked
- Making selections early, during design
- Quality basics you can upgrade later
- Spending on what you touch every day
Existing homes
An EnerPHit retrofit works with what's already there, which can save on demolition and materials but adds unknowns behind the plasterboard. Per square metre, a deep retrofit can cost as much as a new build, and the value is in keeping a home and a street you love.
- Surprises in the existing structure
- Patching rather than planning the whole house
- Adding on without upgrading the original
- Investigating the existing home early
- One plan for the whole house, even if built in stages
- Keeping what works, like the brick on Retrofit Rifle
Which way are your choices pushing the cost?
Pick one option on each line. There are no prices here, just the direction your choices move a build. It's the same conversation we have with clients and their designers at concept stage.
Pick an option on each line and the marker will show which way your choices are leaning.
You pay to build it once, and to run it every month
Build cost is the number everyone focuses on, but it's only part of the story. A standard home keeps costing you through every winter and summer, while a Passive House barely needs heating or cooling at all.
We know this because we live in one. Here are the real power bills from our own home, Pigeon Passive House in Yarraville, through the middle of a Melbourne winter.
Both bills include charging an electric car and the daily service fee, and there's no gas bill at all because the house is fully electric.
See Pigeon Passive HousePassive House compared with a standard build
The upfront price is only one line in this table. The rest is what you're actually paying for.
| Standard 7 star build | Carland Constructions high performance | Certified Passive House | |
|---|---|---|---|
| Upfront build cost | The baseline | Usually a little more | Usually more, by how much depends on the design |
| Heating and cooling | Often a large ducted system | A small system sized from the model | A small system for a house that barely needs it |
| Running costs | Ongoing heating, cooling and often gas | Low, fully electric | Very low, fully electric |
| Airtightness | No test required for most homes | Under 1.0 ACH50 on new builds | 0.6 ACH50 or better |
| Fresh air | Opening windows and exhaust fans | Heat recovery ventilation | Heat recovery ventilation |
| Condensation and mould | A common problem | Designed out | Designed out |
| Modelling | Star rating software | PHPP | PHPP, independently checked |
| Proof | A rating on paper | Blower door tested mid build and at completion | Tested and independently certified |
Not sure if you need the certificate? Our high performance standard uses the same building science without certification, and for a lot of clients that's the sweet spot between cost and performance.
Why the price should come before the plans
The cheapest time to change anything is while it's still lines on a screen. Early in design, moving a wall or resizing a window costs a conversation. Once the plans are finished and approved, the same change costs redrawing, re-engineering and sometimes a new permit. During construction, it costs a variation.
Most builders are brought in after the plans are locked, and price a design that's already been shaped by someone who doesn't build for a living. By then the big cost decisions are made, and the only way to fix the wrong ones is to spend money. That's why we join the design team early and price the project as it develops.
See how we workThe budget alignment study
This is how we answer the cost question properly, for your project rather than an average one. It's built for people with concept plans, or about to start design, who want to know the real cost before they fall in love with a design.
What you get
- Two independent estimates of your concept design
- A forecast checked against our own build data from comparable Carland Constructions projects
- A short report with one honest range, so you know if your budget matches your brief
- A one hour online meeting to talk it through and answer your questions
- Clear advice on where the design is driving cost and what you could change
How it works
- Send us your concept plans or briefSketches are fine. The earlier the better.
- We forecast the buildIndependent estimates, checked against what similar homes have actually cost us to build.
- You get one honest rangeA short report that answers one question: does your budget match your brief?
- We talk it throughA one hour online meeting with you, and your designer if you like.
- You decidePush ahead with confidence, adjust the design to fit, or walk away before it costs you more.
If you go ahead, our detailed final cost estimate follows during design development. It usually takes six to eight weeks, because we send a quote request to every trade and build it from real prices rather than rates.
Where to save, and where never to
If the numbers are tight, there are good places to save and bad ones. The rule is simple. Save on things you can change later, and never on things buried in the walls, because you only get one chance to build those properly.
Good places to save
These are easy to upgrade or add later.
- Build a little smaller and spend the difference on quality.
- Keep the shape simple with fewer corners and a simple roof.
- Use standard window sizes and put most of the glass to the north.
- Choose quality basic finishes and upgrade the kitchen or bathroom later.
- Leave landscaping and extras for later once you've lived in the house.
- Lock in selections early so allowances don't blow out during the build.
Never save here
These are almost impossible to fix once the plasterboard goes on.
- Airtightness the membranes, tapes and details that keep the air and moisture where they belong.
- Insulation and how carefully it's installed.
- Windows and doors because replacing them later costs far more than buying right once.
- Ventilation a sealed house needs fresh air by design, not by accident.
- Water and moisture management flashings, drainage and wraps that stop the rot before it starts.
- Testing the blower door test is how you know you got what you paid for.
Six questions to ask any builder about their price
Two quotes for the same plans can look very different once you read them closely. Ask these before you compare the bottom lines.
A price built from quotes for your actual plans is far more reliable than a square metre rate or an estimate from a database.
Provisional sums and prime cost items are placeholders for things not yet known or picked. Big allowances make a quote look cheaper than it really is.
Site costs, demolition, landscaping, permits and GST are often left out. Line the exclusions up side by side.
If performance matters to you, the target should be in writing, along with what happens if it isn't met.
A test mid build, while leaks can still be fixed, is worth far more than a single test at the end.
Every design change affects performance, so the PHPP model should follow the design all the way to construction.
Passive House cost questions, answered
How much does a Passive House cost in Melbourne?
It depends on the size, shape, site, foundations, windows and finishes of your design, so there's no honest single figure. A Passive House usually costs a bit more to build than a standard 7 star home, and our honest guess is somewhere between 1 and 20 percent more depending on the design. Carland Constructions gives each client one honest range for their own project through a budget alignment study at concept stage.
How much does a Passive House cost per square metre?
There's no reliable single rate. A square metre rate is an average of homes that aren't yours, smaller homes always look dearer per metre because kitchens, bathrooms and services cost much the same regardless of size, and rates often hide what's included. We price your actual design against our own data from comparable projects instead.
Is a Passive House more expensive to build than a standard home?
Usually, yes. By how much depends on the project, and our honest guess is somewhere between 1 and 20 percent more than a standard build, mostly in windows, ventilation, membranes, insulation and the extra care on site. The earlier the design is shaped around Passive House principles, the smaller the premium.
Can a Passive House cost less than a standard build?
Sometimes. A Passive House needs far less heating and cooling, so a design that does away with a large ducted system and a gas connection can claw back much of the extra spent on windows, insulation and airtightness. A simple, compact, well oriented design gives you the best chance.
Where does the extra cost of a Passive House go?
Mostly into things you can't see: better windows and doors, heat recovery ventilation, airtightness membranes and tapes, more and better installed insulation, thermal bridge free details, PHPP modelling, testing, and certification if you choose it.
Is a Passive House worth the extra cost?
For most people who live in one, yes. A Passive House stays at a steady temperature all year, has fresh filtered air around the clock, stays quiet, avoids condensation and mould and costs very little to run. The extra build cost buys comfort and health every day you live there.
How much does a Passive House cost to run?
Very little. Pigeon Passive House in Yarraville had a July 2026 power bill of about $80 and an August 2026 bill of $88.77, both in the middle of winter and both including electric car charging and the daily service fee, with no gas bill.
Does an EnerPHit retrofit cost less than a new Passive House?
Not always. A deep retrofit can save on demolition and materials, but it comes with unknowns in the existing structure, and per square metre it can cost as much as a new build. The value is in keeping a home and a street you love, and in investigating the existing house early so there are fewer surprises.
What is a budget alignment study?
It's how Carland Constructions prices a project at concept stage. We get two independent estimates of your concept design, check them against our own build data from comparable projects, and give you a short report with one honest range, followed by a one hour online meeting to talk it through. It's a range, not a quote, and it answers one question: does your budget match your brief?
How long does it take to get a final price?
Our detailed final cost estimate usually takes six to eight weeks once the design is developed, because we send a quote request to every trade and build the estimate from real prices rather than rates.
How can I keep the cost of a Passive House down?
Build a little smaller and better, keep the shape simple and compact, put most of the glass to the north in standard sizes, choose quality basic finishes you can upgrade later, make selections early, and get your builder involved at concept stage. Never save on airtightness, insulation, windows, ventilation or moisture management, because they can't be fixed once the walls are closed.
When should I talk to a builder about cost?
As early as possible, ideally at concept stage. That's when changes cost a conversation instead of a variation, and when a builder can help the design and the budget line up before anything is locked in.
Find out if your budget matches your brief
Send us your concept plans or tell us about your project, and we'll tell you honestly whether the numbers stack up before you spend another dollar on design.
The information on this page is general in nature and isn't a quote or an estimate for any particular project. Every project is priced on its own design, site and specification.