Designing Outdoor Living Spaces That Actually Work in WA's Climate

An alfresco facing south-west on a coastal property, with no roof cover and no windbreak, is an investment that will spend most of the year unused. WA's outdoor living culture is real, but so is the wind, the summer heat, and the need to design for both.

Western Australia's climate is genuinely excellent for outdoor living , but only if your outdoor spaces are designed with that climate in mind. WA's weather means long, hot, dry summers and mild winters. That's an ideal scenario for year-round outdoor use, but getting the orientation, coverage, and screening wrong means an outdoor space that's a heat trap in summer or too exposed to use in the cooler months.

Orientation: the single most important decision

An outdoor living area facing north or north-east will receive good winter sun while being more easily shaded from the high summer sun with appropriate eave depth. A well-designed north-facing alfresco with a 900mm eave overhang will be shaded from the overhead December sun while capturing the lower June sun, usable year-round.

An alfresco facing west receives intense afternoon sun in summer, from around 1pm until sunset, making it effectively unusable during the hottest part of the hottest days. This is the single most common outdoor living mistake we see, and it's 100% avoidable at the design stage.

Roof cover: non-negotiable in WA

A covered alfresco or pergola is effectively essential in WA's climate. Without cover, the space is unusable during summer heat and uncomfortable during winter rain. The roof design, pitch, material, and overhang depth, affects both solar shading and rain protection.

Insulated roofing significantly reduces radiant heat transfer from the roof into the space below, making a covered alfresco genuinely comfortable even on hot days. A clear polycarbonate roof might look appealing but creates a greenhouse effect that is counterproductive in summer.

Wind protection for coastal Southwest locations

On the Leeuwin-Naturaliste ridge, coastal exposure to prevailing southerlies is a year-round consideration. Towns like Prevelly, Gracetown, and Augusta regularly experience strong winds that make unsheltered outdoor areas uncomfortable. Native windbreak planting, solid screens, or careful positioning of the alfresco in the lee of the main building can create a genuinely sheltered microclimate.

It's worth noting that windbreak screens need to be designed within bushfire requirements, solid screens close to the building may affect BAL compliance. Both considerations need to be resolved together.

Connection and integration

A good alfresco feels like a seamless extension of the indoor living area, not a separate structure you walk out to. Stacking or bi-fold doors that open the full width of the living area, a consistent floor level (or a single flush step), and good artificial lighting create a genuine indoor-outdoor connection that extends the usable living space of the home.

Frequently Asked Questions

Do I need a building permit for an alfresco in WA?

Covered outdoor living areas attached to the house generally require a building permit. Free-standing pergolas may be exempt depending on size and construction. Always check with your local council, requirements vary and some Southwest councils have specific local planning policies covering outdoor structures.

What eave depth do I need to shade a north-facing alfresco?

The required eave depth depends on your latitude. For Bunbury (approximately 33° south), an eave projection of 600–900mm will provide good summer shading on a north-facing wall while admitting winter sun. For Margaret River (34°S), slightly deeper eaves are beneficial.

Can I add an alfresco to an existing home?

Yes, alfresco additions are one of the most common renovation projects in WA. The process typically requires a building permit, and if the addition is close to a side or rear boundary, a development application may also be required. We handle both as part of our renovation design service.

Chat with us about smart alfresco design. Let's design an outdoor space you'll use all year: projects@fastlanedesign.com.au