Certified Passive House Design
in Melbourne & Victoria

What is a Passive House?

Passive House (or Passivhaus) is an internationally recognised performance standard for ultra-low energy buildings.

Developed in Germany and applied globally, it is a rigorous, science-based methodology focused on thermal comfort, air quality, durability and measurable energy performance.

Unlike stylistic approaches or minimum compliance-based design, Passive House is modelled, tested and independently verified.

Every certified project must demonstrate performance against strict criteria for airtightness, heating demand, overheating control and primary energy use.

As Certified Passive House Designers practising in Melbourne since 2012, we integrate building science with refined architectural design to deliver homes that perform precisely as intended.

Why Consider Passive House in Melbourne’s Climate?

Climate Resilience

Melbourne’s variable climate with hot summers, cool winters and increasingly frequent extreme weather events makes performance-led design particularly valuable. A well-designed Passive House responds to all of these conditions simultaneously.

Stable Indoor Temperatures

Certified Passive House projects are designed to limit space heating demand to 15 kWh/m² per year and peak heating loads to below 10 W/m². Through continuous insulation and thermal bridge-free detailing, indoor temperatures remain consistent throughout the home; typically between 20–25°C year-round, without reliance on conventional high-energy heating and cooling systems.

Measured Airtightness

Passive House requires airtightness of less than 0.6 air changes per hour at 50 Pascals, verified through independent blower door testing. This eliminates draughts and uncontrolled heat loss which are two of the most common complaints in conventionally built Australian homes.

Continuous Fresh, Filtered Air

Mechanical Heat Recovery Ventilation (HRV) provides a constant supply of filtered fresh air while recovering warmth or coolth from exhaust air (depending on the season). This reduces condensation, removes dust, pollen and airborne particles, and supports healthy indoor air quality year-round. For clients with respiratory sensitivities or allergies, this is a meaningful improvement in daily comfort and well-being.

Acoustic Calm

The combination of triple glazing, continuous insulation and airtight construction significantly reduces external noise. Whether in inner Melbourne or on an exposed rural site, the interior environment is noticeably quieter and more restorative.

Simplicity in Operation

A well-designed Passive House requires minimal active systems to maintain comfort. Orientation, insulation, airtightness, glazing and shading do the work so the home stays cool in summer and warm in winter without complex controls or constant adjustment. This simplicity is particularly valued by clients who want a home that performs reliably without ongoing management.

Energy Stability and Resilience

Certified Passive House construction can reduce heating and cooling energy demand by up to 90% compared to standard Australian homes. The highly insulated, airtight envelope also means a Passive House retains comfortable indoor temperatures for significantly longer during power outages or extreme weather events. This is an important consideration as grid instability increases. With integrated solar PV and battery systems, many projects operate with minimal or no reliance on the electricity grid.

Independence

For clients planning a long-term residence or retirement home, whether in Albert Park, the Mornington Peninsula, Macedon Ranges or the High Country, this offers genuine stability, predictability and independence from rising energy costs.

Long-Term Value

A Passive House is an investment in quality and durability. The detailed planning and precision construction required for certification result in a building that outperforms conventional homes over its lifetime. Growing market awareness of high-performance housing is also leading to increased financing options and recognition that lower running costs contribute to long-term property value.

How Passive House performs in Melbourne’s Climate in Diagrams

Why Work With a Certified Passive House Designer?

Many architects and builders reference Passive House principles in their marketing, but certification as a Passive House Designer requires specific training, examination and demonstrated competence in PHPP energy modelling, airtight detailing and performance verification.

Working with a certified designer means your project is led by someone who understands not just the principles but the methodology — how to model performance accurately, how to detail junctions to prevent thermal bridging, how to coordinate trades to maintain the airtight layer, and how to navigate the independent certification process. Read out the process and our services here.

Our team were among the first Certified Passive House Designers qualified in Australia, and we have been practising in Melbourne since 2012. This depth of experience means fewer surprises during construction and confidence that the finished home will perform as modelled. Read about our Practice and our ethos here.

Our Approach: PHPP Modelling and Independent Certification

Every project begins with detailed energy modelling using PHPP (Passive House Planning Package), the internationally recognised software developed by the Passive House Institute. PHPP allows us to test and optimise performance: glazing ratios, orientation, shading, insulation levels and ventilation rates, before construction begins.

This level of pre-design and coordination also lends itself to efficient modern methods of construction such as prefabrication in engineered timber, SIPs and modular construction as detailed in our full guide here.

Where certification is pursued, documentation and performance data are reviewed by an independent Passive House certifier. We have successfully delivered multiple Certified Passive House Classic and Plus projects, with a Premium project underway.

All our practitioners are certified and experienced Passive House designers, and were among the first qualified in Australia. Our story is here.

1. Insulation

2. Thermal Bridge Free Construction

3. High-Performance Triple Glazing

4. Airtight Construction

5. Heat Recovery Ventilation

6. External Operable Shading

7. Renewables = Low Primary Energy Demand

How to achieve the Passive House Standard

There are five core requirements to achieve the Passive House standard. Each addresses a specific aspect of building performance, and together they create an integrated, high-performance envelope.

Continuous High-Performance Insulation

The entire building envelope — walls, roof, floor and slab — is wrapped in continuous, high-level insulation. This prevents heat loss in winter and heat gain in summer. In our projects, insulation is typically multi-layered and coordinated with the structural system to eliminate gaps.

Thermal Bridge-Free Construction

Every junction in a building — where wall meets roof, slab meets wall, window frame meets structure — is a potential thermal bridge where heat can transfer through the envelope. Passive House design requires careful detailing at every junction to prevent this. This also reduces the risk of condensation and mould.

One of the best ways to eliminate Thermal Bridging is to avoid highly conductive materials like steel and concrete. We design the majority of our projects in Timber which is a natural insulator. Read more about our guide to engineered timbers such as glulam, cross Laminated and SIPs construction here.

High-Performance Glazing

Triple-glazed insulated units with thermally broken, airtight frames are selected and positioned based on orientation and solar gain modelling. North-facing glazing is optimised to capture winter warmth, while shading is designed to prevent overheating from west, north and east exposures during summer.

Airtight Construction

An effective airtight layer is maintained across the entire building envelope to minimise uncontrolled heat loss and draughts. All joints, penetrations and junctions are carefully sealed. Airtightness is verified through independent blower door testing to confirm the building meets the Passive House threshold of less than 0.6 air changes per hour at 50 Pascals.

Heat Recovery Ventilation (HRV) and All-Electric Systems

Energy-efficient, fan-based heat exchanger ventilation systems provide continuous fresh, filtered air to every room while recovering up to 90% of the warmth from exhaust air. This is the mechanism that allows a Passive House to be sealed tightly while maintaining excellent indoor air quality.

Our Passive House projects are designed as all-electric, thus eliminating gas entirely. Combined with heat pump technology for hot water and space conditioning, an all-electric Passive House is simpler to operate, avoids combustion-related indoor air quality issues, and integrates directly with rooftop solar and battery systems. This is a deliberate design decision that supports both performance and long-term independence from fossil fuels.

Two additional measures are recommended to achieve Passive House Plus certification:

External Shading

Fixed and operable external shading on glazing facing west, north and east prevents overheating. This is particularly important in Melbourne’s climate, where summer solar gain through unshaded glass can be significant.

Renewable Energy Generation

Sufficient renewable generation capacity which is typically rooftop solar PV, ensures the home can achieve carbon neutral or carbon positive performance. Combined with battery storage, this enables off-grid capability and independence from the electricity network.

Criteria for PassivHaus Certification

To achieve internationally recognised certification through the Passive House Institute, a building must meet strict performance benchmarks:

Space Heating Demand:

Keep heating energy consumption below 15 kWh per square meter annually.

Peak Heating Loads:

Limit peak heating loads to under 10 W per square meter.

Cooling and Dehumidification:

Ensure cooling and dehumidification energy use is less than 15 kWh per square meter annually.

Airtightness:

Conduct tests to show less than 0.64 air changes per hour at 50 pascals of pressure. This is verified by independent blower door testing.

Primary Energy:

Total energy consumption for heating, cooling, hot water, and appliances must meet specified limits based on the building’s size.

Overheating Control:

The internal temperature should be ≤ 25°C for at least 90% of the year

Independent Verification

Certification is independently verified and requires detailed documentation, modelling and on-site testing.

1. Highly insulated with multiple layers

2. Thermal-Bridge Free Construction Junctions

3. Triple Glazing

4. Blower Door Testing for Airtightness

5. Heat Recovery Ventilation = Stable Internal Temperature

5. Fresh filtered air via heat recovery ventilation

5. All-electric home = clean & healthy

6. External Operable Shading

7. RenewableSolar PV = Carbon Neutral

7. Renewables = Low Primary Energy Demand

8. Off-grid systems = battery & backup

Categories of Passive Houses

The Passive House Institute recognises several categories of certification. Understanding these helps clarify what level of performance a project is targeting:

Classic:

The foundational Passive House standard. A project achieves Classic certification once airtightness, total energy use, and heating and cooling demands are met.

Plus:

Passive House Plus projects are effectively energy neutral, minimising consumption and generating as much renewable energy annually as the building uses. This accounts for losses through storage, generation and transmission.

Premium:

Premium certification goes further, with projects designed to generate a renewable energy surplus beyond the building’s annual needs.

Low Energy Buildings:

This is a standard for energy efficiency and airtightness, and all our projects should naturally achieve this standard.

Enerphit:

A certification pathway for the retrofit and renovation of existing buildings, with adjusted thresholds that recognise the constraints of working with existing structures.

As standard, our new-build projects are designed to Passive House or Plus level. Our Geelong West heritage project is an example of an EnerPHit renovation.

Living in a Passive House: Experience in Practice

Our own family home in Albert Park targeting Passive House Plus, has been designed and built using the same principles and construction methods we apply for our clients.

Living in a Passive House daily has reinforced what performance modelling predicts: consistent comfort in every room, filtered air that noticeably improves wellbeing, acoustic calm, and remarkably low energy use. Our home operates with minimal grid reliance and the indoor environment remains stable regardless of Melbourne’s notorious weather.

This lived experience informs our detailing, our construction supervision and our advice to clients. It allows us to speak not only from the theoretical knowledge of modelling and certification, but from the practical reality of daily life in a high-performance home.

Passive House Across Melbourne and Regional Victoria

We design certified Passive House homes across Melbourne and regional Victoria, including the Mornington Peninsula, Macedon Ranges, Yarra Valley, Surf Coast and High Country.

Each region presents specific design challenges: Bushfire Attack Level (BAL) compliance, coastal exposure, off-grid requirements, and significant seasonal temperature variation.

Passive House principles, when carefully integrated with site-specific analysis, offer resilience and comfort in each of these contexts.

Whether your site is an established inner-Melbourne block or a remote rural property, we adapt the Passive House methodology to suit.

Read about our full services and the Architectural Design Process here.

Passive House and Engineered Timber Construction

Many of our Passive House projects utilise engineered timber systems including cross-laminated timber (CLT), glue-laminated posts and beams (glulam) and prefabricated Structural Insulated Panels (SIPs).

Mass timber stores carbon rather than emitting it, offering significantly reduced embodied carbon compared to conventional steel and concrete construction. Engineered timber also integrates naturally with the airtight, highly insulated envelopes required for Passive House performance. Prefabrication supports greater precision in construction which is a significant advantage when targeting Passive House airtightness thresholds and it reduces on-site construction time and waste.

Our experience combining Passive House design with engineered timber construction enables us to coordinate structure, envelope and performance from the earliest design stages.

Whether you are considering a tree-change in regional Victoria, a refined coastal residence, or a certified Passive House in Melbourne, an early conversation allows us to explore feasibility, site potential and performance ambitions together.