What is Passive House and is it worth it in Melbourne?
November 2023
Last updated February 2026
Is Passive House worth it for a Melbourne home?
Many homeowners are curious about Passive House design but unsure how it applies to renovations, heritage properties, or local climate conditions. Passive House is a proven approach to creating comfortable, healthy, ultra-low-energy homes, and it is increasingly being adopted across Melbourne and regional Victoria.
If you’re looking to work with a Passivhaus architect in Melbourne, you can learn more about our approach here.
In this guide, we focus specifically on whether Passive House is worth it in Melbourne — considering climate, comfort, cost, heritage constraints, and long-term performance.
As architects, we focus on helping clients achieve homes that are not only energy-efficient but also sustainable, comfortable, and built to last.
In this post, we share the essential information we provide to clients about Passive House construction in Melbourne and regional Victoria.
For many clients, this conversation begins with an early Master Plan or Feasibility Study, which allows performance goals, budget, planning constraints, and site-specific factors to be tested before committing to detailed design.
Why Homeowners Choose Passive House in Melbourne
Increased comfort, less energy consumption
With Passive House buildings, careful planning and procurement are critical. Attention to detail is paramount to ensure a minimal energy demand, with the heat of four people (or 10 tea light candles) being able to keep an area of 20 m² in the height of winter, even in extremely cold climates. In practice a Passive House is not heated with tea lights; however, the equivalent energy use is used with efficient heating systems in combination with mechanical ventilation with heat recovery. In summer, Passive House homes provide excellent comfort with little or no reliance on air conditioning. Thus, with a Passive House, the energy needed for heating and cooling is extremely low.
Comfortable
The super-insulated continuous envelope of a Passive House keeps the indoor temperatures at a consistently comfortable level, without temperature extremes or draughts, whilst also providing an extremely quiet home from external noises from busy urban areas. And, the mechanical ventilation with heat recovery (MVHR) provides a supply of continuous fresh filtered air at room temperature, which provides protection from pollution, smoke, pollen, and odours.
Durability
To achieve Passive House ultra-low energy levels high-quality building physics are used. The three key aspects being continuous insulation, an airtight building envelope, along with thermal bridge free construction. This results in the building having structural longevity, with ultra-low risks of condensation within the building structure (and interiors).
Future-proofing your home
Melbourne’s climate is becoming more extreme, with hotter summers, rising energy prices, and increasing expectations around building performance. Designing to the Passive House standard provides resilience against these shifts.
Because energy demand is dramatically reduced, homes are less exposed to energy price volatility. High levels of insulation, airtightness, and controlled ventilation also reduce long-term moisture risk and building degradation.
For homeowners planning to stay long-term, this can provide both environmental and financial stability.
Affordability
Economics and Affordability
Passive House projects are high performance and high-quality buildings, where the initial investment costs are typical – but not always – higher due to the additional design input and superior building components. However, over the building’s life span they are more cost-effective than your standard build, due to the low running costs.
When it comes to Passive House and building costs, there are many misconceptions. In Melbourne, a premium is common — particularly on tighter budgets — but with early integration and efficient design, this premium can sometimes be minimised.
There is also a completed case study which concludes that the cost premium for Passive House construction in Sydney is negligible.
Passive House also has the benefit that it doesn’t require thermal mass, unlike a passive solar design. This provides additional savings.
Learn more about the costs of building to the Passivhaus standard.
Large savings
Ultra-low energy is the key component of Passive House. When compared to a standard building, there is typically a reduction of 90 percent in energy use for heating and cooling.
When you take these running costs into account, Passive House is even more cost-effective.
Reducing energy requirements further
To further reduce energy use it is important to use efficient electrical appliances. Whilst to run the mechanical ventilation with heat recovery is negligible with it being roughly 2 kWh/m², which is less than an LED light bulb.
Design
Simplicity
Passive Houses are user-friendly and uncomplicated and don’t require user manuals to operate. And, they provide comfortable temperatures, no draughts, and fresh air.
Image credit: Albert, Righter and Tittman Architects
Unique
The Passive House Standard is a voluntary ultra-low energy standard. People are drawn to it for its benefits and simplicity. It can be built by anyone and it makes a sustainable contribution without compromising on comfort, with construction products and the Passive House Planning Package (PHPP) software being accessible.
Whether a Passive House has a basic or unique design, it is always something special.
Environment Sustainability
Adaptability to local climates
The Passive House Standard has a general methodology that is used worldwide. Whilst each project will have individual components that respond to the local climate.
For example, to ensure comfort during hot periods in warmer climates greater attention is given to passive cooling, with shading devices and natural ventilation. Thus, each Passive House building will have individual characteristics that are optimised to the local climate.
Environmental sustainability
With ultra-low energy use, Passive House makes the use of renewable energy more affordable with the demands being less. For example, you would require fewer photovoltaic panels than a standard build as your energy demands will be minimal. Passive House ultra-low energy use significantly reduces CO² emissions and provides a positive contribution to minimising climate change.
Frequently Asked Questions
Will building to Passive House Standard be more expensive?
With smart design, an architecturally designed, custom-built Passive House can be delivered for the same, or even less, than an equivalent house built to the minimum standards required by National Construction Code (NCC).
In milder climates like Sydney, Passive House projects have proven to be cost-neutral. And there are examples of houses that have been built in Victoria, where it was cheaper to build the same design as the Passive House Standard, as opposed to solar passive design.
Where it can be more expensive is when you are taking a new home built by a volume-builder – which is designed to be mass-produced, large, and inexpensive – to the Passive House standard.
Is Passive House different to Passive Solar design?
There are common threads between Passive House and passive solar design, however, they are distinctly different. Passive solar design is principles-based and can perform well, but it does not provide the same level of measured comfort, indoor air quality control, or verified ultra-low energy demand as the Passive House standard.
A Certified Passive House designer will use passive solar gain – if available – and will accurately model its effects on the home’s overall performance. And it has the health and comfort benefits of constant ventilation, even if no one is home to open the windows.
Passive solar design requires a north-facing orientation for controlled solar gains, appropriate shading, and natural ventilation, along with thermal mass to minimise fluctuating indoor temperatures. In many circumstances passive solar is not feasible due to the site orientation or overshadowing from an adjacent site.
Passive solar design sets out to maintain comfortable average temperatures, but averages can disguise substantial and uncomfortable changes in indoor temperature over a 24-hour period.
There is also the challenge of adequate ventilation vs comfortable indoor temperatures. When outdoor temperatures are extreme windows need to be kept closed to assist in maintaining comfortable indoor temperatures, which limits fresh air.
Passive House was developed in Europe, is it relevant for Australia’s climate?
In Europe, they focus on minimising heating, whilst in Australia, we also consider limiting cooling. Passive House is flexible, it is a performance-based standard, which does not dictate how it is achieved.
Australia has many different climate types, and a Passive House designer uses the modelling software and local climate files to inform the design. A Passive House in Hobart will require more insulation and different glazing to achieve ultra-low energy use when compared to a location like Darwin.
Data ensures Australian homeowners obtain all the benefits of Passive House at a cost and complexity that suits their site conditions and local climate.
Can windows be opened in a Passive House?
Windows can be opened in a Passive House, and it is ok if you want to maintain the indoor-outdoor feel by leaving your external sliding doors open, hearing the birds, or listening out for your children.
But if you live in a noisy area, or it is hot or cold outside, you will appreciate the quietness of a Passive House when the windows are closed.
In addition to the thermal qualities of double or triple glazing, there are also acoustic benefits.
It is not necessary to open windows. As the ventilation system is providing continuous fresh filtered air at a constant temperature into your home.
Passive Houses are airtight, is this healthy?
Passive Houses are airtight, which is different to being sealed. They are healthier than a standard build. This is due to the mechanical ventilation system with heat recovery (MVHR). This continually removes stale, damp air from the interior spaces, and replaces it with fresh filtered air.
Can Passive House principles be applied to existing homes?
Yes, Passive House principles can be applied to existing homes through what is called an EnerPHit retrofit. These retrofits adapt the Passive House standard to older buildings. By improving energy efficiency, comfort, and indoor air quality without requiring a full rebuild.
An EnerPHit retrofit typically involves upgrading insulation, windows, airtightness, and ventilation systems. Whilst also considering the building’s existing structure and heritage features. This approach allows homeowners to reduce heating and cooling costs. This achieves more consistent indoor temperatures and creates a healthier living environment. All while respecting the character of their existing home.
If you’d like to know more about who you’d be working with and how I approach projects, you can read more about Jane Cameron Finlay FRAIA, Director of Jane Cameron Architects.
Read more about our studio, values, and design philosophy.
Is it worth it in Melbourne?
For many homeowners, the answer depends on priorities. If comfort, low energy demand, long-term durability, and predictable performance matter, Passive House can be a compelling approach. The key is testing feasibility early — through modelling, budget alignment, and site analysis — before committing to detailed design.