Sunroom addition cost in Perth, AU
Lifestyle upgrade
In Perth, AU, a midrange sunroom addition typically costs around A$81,300 — about 7% above the national average, reflecting local labour and material prices. On average it recoups about 50% of its cost at resale.
Perth has become Australia's second-most expensive city to build in after Sydney, with the mining sector competing for trades and Western Australia's isolation adding freight cost to nearly every material.
Local cost factors in Perth, AU
- Mining-sector labour pull
- The resources sector competes hard for skilled trades, tightening availability and lifting rates.
- Isolation & freight
- Western Australia's distance from eastern supply hubs adds freight cost to nearly every material.
- Hot, dry climate
- Intense summer heat drives demand for efficient cooling, insulation and heat-tolerant exterior materials.
| Estimated cost in Perth, AU | A$81,300 |
| Typical range | A$69,100 – A$93,500 |
| Resale value added | A$40,700 |
| Cost recouped (ROI) | 50% |
| National average (for comparison) | $50,000 |
What's included
- Foundation or reinforced slab
- Framing and large glazed walls/roof
- Insulation and climate control (four-season)
- Flooring, electrical and lighting
- Permits and professional fees
Pro tip: A four-season room that ties into the home's heating and finishes reads as real living space and returns more; a three-season or screened room is cheaper but recoups noticeably less.
What affects the cost of a sunroom addition
- Three- vs four-season
- Insulation, glazing and climate control make a four-season room cost — and return — more than a screened one.
- Foundation
- A slab or reinforced foundation for a heated room costs more than a simple deck-style base for a three-season room.
- Glazing extent
- More glass and higher-performance windows raise both cost and comfort.
- HVAC tie-in
- Extending heating and cooling into the room is what makes it count as living space — and adds cost.
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How it compares
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Sunroom addition in Perth, AU: common questions
General guidance for sunroom addition projects — figures quoted are national averages; see the table above for Perth, AU estimates.
How much does a sunroom cost in 2026?
About $50,000 on average, from roughly $25,000 for a three-season room to $80,000+ for a fully insulated four-season room.
Does a sunroom add value?
It recoups around 50% of its cost — a four-season room that counts as living space returns more than a three-season or screened one. Treat it as a lifestyle addition.
Three-season or four-season sunroom?
A four-season room costs more but is usable year-round and adds to counted living area; a three-season room is cheaper but limited to mild weather.
Is a sunroom cheaper than a regular addition?
Usually yes — its glazed, lighter construction costs less per square foot than a conventional framed addition, though it also returns less.
Other locations
Regional figures apply a local cost adjustment to national midrange averages and are planning estimates only — confirm with local contractor quotes. Not financial or real-estate advice. Reviewed June 2026. See our full methodology →
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