Sydney + NSW | 5 September 2026

Sydney reached 33°C on 5 September, almost 13°C above the September average.

Dry conditions and gusty winds pushed fire danger to extreme levels and triggered a total fire ban across Greater Sydney. The unusually early heat arrived as a powerful El Niño continued to influence weather conditions.

It was an uncomfortable preview of a question that is becoming increasingly important in residential architecture:

How well will your home work when the weather doesn’t behave as expected?

For homeowners planning a renovation or new home, climate resilience doesn’t necessarily mean complicated technology or expensive additions.

Some of the most effective decisions are architectural fundamentals: orientation, external shading, appropriate glazing, insulation, ceiling fans, cross-ventilation, landscaping and an understanding of the bushfire conditions around the site.

The important part is considering them before the floor plan is locked in.

A Comfortable Home Shouldn’t Depend Entirely on Air-Conditioning

Air-conditioning has an important role in Australian homes, but good residential design should reduce how hard it needs to work.

Passive cooling combines two ideas: reducing unwanted heat entering a building and creating opportunities for heat to escape. Shading, insulation, window design, ventilation, ceiling fans and landscaping all contribute.

The difference becomes particularly noticeable during very hot weather.

Two houses on the same street can experience the same outdoor temperature very differently.

One might have:

• large, unprotected western windows
• bedrooms exposed to afternoon sun
• limited cross-ventilation
• dark, heat-exposed external surfaces
• little landscape shade
• fixed glazing
• no ceiling fans

Another might use:

• appropriately oriented living areas
• external shading
• controlled glazing
• effective insulation
• ceiling fans
• openings positioned for cross-ventilation
• shaded gardens and outdoor areas
• ways to release accumulated heat when conditions cool

Both houses can have air-conditioning, but the second gives its occupants more ways to remain comfortable.

That is resilience.

1. Start With the Sun

Before deciding where the kitchen goes, we should understand where the sun goes.

Orientation remains one of the fundamental tools of passive residential design.

In temperate Australian climates, the objective is often a balancing act: allowing useful northern winter sun into the home while protecting it from unwanted summer heat.

East- and particularly west-facing glazing requires careful attention because low-angle morning and afternoon sun can be difficult to control. These windows often benefit from minimised glazing or carefully designed external shading.

This doesn’t mean every window has to face north. Architecture is rarely that simple.

Views, privacy, neighbouring buildings, slope, trees, streets and the shape of the block all influence the design. The important thing is understanding the consequence of each decision.

A beautiful western view may absolutely justify a large window. But then we need to ask:

How will we control the afternoon sun?

The answer might involve an external blind, deep screen, verandah, vegetation, carefully selected glazing or a combination of strategies.

2. Use External Shading

A high-performance window can help reduce heat transfer, but stopping excessive summer sun before it reaches the glass can be even more effective.

This is why we consider the following elements part of the architecture:

• eaves
• pergolas
• awnings
• external blinds
• vertical screens
• verandahs
• balconies
• shutters
• trees and planting

Different orientations require different responses.

High summer sun from the north can often be controlled with correctly designed horizontal shading while still allowing lower winter sun beneath it.

East and west sun arrives at a much lower angle, so vertical or adjustable shading can become more important.

The aim isn’t to create a dark house. It is to put daylight where we want it while controlling unwanted heat.

3. Design a Path for Air to Move Through the House

“Add more windows” is not the same as designing good natural ventilation.

For cross-ventilation to work, air needs somewhere useful to enter and somewhere useful to leave.

Window type, size, height and location matter. So does the internal floor plan.

Openings should be positioned to capture cooling breezes, with rooms arranged so air can move through the building. High-level openings can also support stack ventilation by allowing warmer air to rise and escape.

This is where architectural planning becomes important.

A breeze hitting a closed hallway wall doesn’t help much. A breeze that can travel from a shaded garden, through a living area and out through another opening can.

For a new home or major renovation, we should ask:

• Where are the useful summer breezes?
• Can the floor plan capture them?
• Where does the air escape?
• Can bedrooms ventilate effectively at night?
• Can windows safely remain open when appropriate?

These questions are much easier to resolve on a floor plan than after construction.

4. Don’t Forget the Ceiling Fan

Ceiling fans are remarkably simple technology. Architecturally, they are also one of the easiest resilience measures to incorporate.

Fans don’t necessarily reduce the actual air temperature. They increase air movement across the body, improving perceived comfort and reducing reliance on air-conditioning.

We like to plan for ceiling fans early, particularly in:

• bedrooms
• living rooms
• family rooms
• kitchens, where appropriate
• covered outdoor areas

Planning early matters.

Fan locations need to work with lighting, ceiling heights, cabinetry, furniture and the electrical layout. It is much easier to resolve this during design than to discover later that the only possible position clashes with the pendant light above the dining table.

5. Think About Night-Time Cooling

Hot houses often accumulate heat throughout the day. If the outside temperature drops overnight, there may be an opportunity to release some of that stored heat.

This is often called night purging or night ventilation.

The principle is straightforward: when outside conditions become cooler than inside, appropriately located openings can allow accumulated heat to escape and cooler air to move through the building.

But the house needs to make this possible.

We need to consider security, insects, noise, privacy and weather protection as well as ventilation. A bedroom window that technically opens but cannot comfortably or securely be left open overnight isn’t necessarily a useful night-ventilation strategy.

6. Treat Landscape as Part of the Thermal Design

Trees aren’t simply decoration added once the architecture is finished. Landscape can change the microclimate immediately around a house.

Strategically located vegetation can:

• shade walls and windows
• protect outdoor living areas
• reduce exposed hard surfaces
• filter harsh winds
• help direct breezes
• create cooler, shaded external areas

Landscape also needs to be coordinated with bushfire requirements where applicable.

A tree that provides excellent western shade may require completely different consideration on a bushfire-prone site—which brings us to another part of climate-ready design.

7. Consider Bushfire Risk Early

The September heat event wasn’t simply about comfort.

Extreme fire danger and the Greater Sydney total fire ban were reminders that heat, dry vegetation and strong winds can quickly create a different type of residential risk.

For sites in bushfire-prone areas, one of the early feasibility questions should be:

What is the site’s bushfire exposure?

The answer can influence the design, materials, openings, construction detailing, landscape strategy and project cost.

This isn’t something we want to discover halfway through documentation.

Where a Bushfire Attack Level assessment or specialist bushfire consultant is required, that information should inform the architecture early.

The objective isn’t to make every home look defensive. It is to understand the site’s actual risk and integrate an appropriate response into the design.

8. Design for the Day the Power Goes Out

This is a useful design exercise, even if it never happens.

Imagine it is 40°C outside. There has been a local power interruption, and the air-conditioning isn’t operating.

Ask:

Which part of the house would you choose to spend the afternoon in?

Ideally, there should be a good answer.

We can think of this as a resilience room, although it doesn’t need to be formally labelled as one. It might simply be a family room or ground-floor bedroom that has been designed particularly well.

Ideally, it has several advantages:

• limited direct summer sun
• good insulation
• effective external shading
• useful openable windows
• access to cross-ventilation
• connection to a shaded outdoor area
• reasonable thermal stability

Battery storage or backup power can add another layer of resilience, but the architectural principle comes first.

Can the building itself help? That is a different question from simply asking how large the air-conditioning system should be.

9. Climate-Ready Doesn’t Mean Filling the House With Technology

There is a tendency to associate sustainable or resilient homes with expensive technology: solar panels, batteries, automated blinds, smart-home systems, heat pumps and high-performance mechanical systems.

These can all be valuable, but some of the highest-value decisions happen before any equipment is specified.

They happen when we decide:

• where the building sits
• where the windows go
• how large those windows are
• which rooms receive afternoon sun
• where the breeze enters
• how the sun is shaded
• where trees are retained or planted
• how the building envelope performs

These decisions can be remarkably difficult—and sometimes impossible—to correct later.

The Residential Studio Climate + Resilience Scan

We are introducing a simple Climate + Resilience Scan into our early feasibility thinking.

Before developing a residential concept, we want to understand seven things.

01 — Summer Sun

Where does unwanted summer solar gain occur? Pay particular attention to the east and west.

02 — Prevailing Breezes

Where are useful cooling breezes likely to come from, and can the floor plan capture them?

03 — Bushfire Exposure

Is the property bushfire-prone, and does a BAL or specialist assessment need to inform the project?

04 — Existing Shade

Which trees, buildings or landscape elements already protect the site? Which are worth retaining?

05 — Glazing

Where are the largest areas of glass? Are their orientation, size, opening type, shading and performance appropriate?

06 — Night Ventilation

Can the house safely release accumulated heat when outdoor temperatures fall?

07 — The Resilience Room

If mechanical cooling is temporarily unavailable, which habitable room is most likely to remain comfortable?

If we cannot identify one, that tells us something useful about the design.

What This Means for Your Project

If you’re planning a new home or significant renovation, don’t wait until the energy assessment to start thinking about climate performance.

Ask these questions while you are still testing the floor plan:

• Where is north?
• What happens to this room at 4 pm in February?
• Which windows can actually be shaded?
• Can air move through the house?
• Can the bedrooms cool down at night?
• Where are the existing trees?
• Is the property bushfire-prone?
• What happens to the house during a power interruption?

These aren’t specialist sustainability extras. Increasingly, they are basic questions about whether a house will be comfortable and practical to live in.

The Residential Studio Perspective

For us, climate-responsive design is becoming less about selling homeowners a collection of “green features” and more about designing out avoidable problems.

A western bedroom that chronically overheats is a design problem.

A beautiful wall of glass that requires the air-conditioner to fight afternoon sun is a design problem.

A floor plan with windows everywhere but no effective ventilation path is a design problem.

The best time to resolve these issues is early, while moving a wall, window or room on a drawing is still relatively easy.

A home doesn’t have to operate without mechanical heating or cooling to be successful, but the architecture should be doing some of the work.

That improves everyday comfort now—and gives the home more options when conditions become more demanding.

Planning a Renovation or New Home?

Residential Studio can review your site, orientation, existing home, planning constraints and early floor-plan ideas before major design decisions are locked in.

Our early feasibility process can include a Climate + Resilience Scan to identify opportunities for better summer comfort, ventilation, shading and site response from the beginning.

☀️Climate + Resilience Scan