At a Glance
Outdoor power installation typically costs $1,500–$4,500 per job across Australia. The range is wide: a weatherproof powerpoint tapped off an existing circuit near an external wall is a half-day job, while running underground cable to a detached shed is a full project. Sydney is the baseline. Perth and Adelaide tend to run 10 to 15% higher.
What's Included
A typical outdoor power installation covers:
- Call-out and site assessment. Inspection to plan the cable route and identify the nearest existing power source.
- Cable run. From the switchboard or a nearby circuit to the outdoor location. Method varies: along walls in surface-mount conduit, underground in orange-sleeved conduit, or a combination. All work must comply with the AS/NZS 3000 Wiring Rules, including minimum burial depths for underground cable.
- Weatherproof fittings. IP56-rated minimum for sheltered locations (under eaves, covered patios). IP66+ for exposed areas.
- Circuit protection. Dedicated circuit breaker and RCD at the switchboard. Non-negotiable for outdoor circuits.
- Trenching. For underground runs. Includes digging, laying conduit at compliant depth, backfilling, and route marking.
- Surface-mount conduit. Standard for external walls. This is normal practice outdoors, not a compromise.
What Affects the Cost
- Distance from power source. The single biggest cost driver. Tapping a circuit 3 metres away through one wall is dramatically cheaper than a 30-metre underground run to a back shed.
- Wall and surface construction. Brick, concrete, and stone are harder and slower to drill than timber framing. Rendered block and retaining walls may need core-drilling.
- Underground vs surface. Underground cable runs cost more but look cleaner. Rocky or root-filled soil adds further expense. Cable sizing must comply with AS/NZS 3008 voltage drop limits, which may require heavier gauge cable on longer runs.
- Weatherproofing grade. Coastal or fully exposed locations need marine-grade fittings (IP66+), which cost more than standard covers.
- Switchboard capacity. If the board is full, adding a new outdoor circuit means upgrading the switchboard first.
- Pool and spa zones. Strict exclusion zones and earthing requirements add compliance cost. Non-compliant installations must be relocated.
- Voltage drop on long runs. Cable runs over 20 metres may need 4mm² or 6mm² cable instead of standard 2.5mm² to keep voltage within safe limits, adding material cost.
A weatherproof powerpoint mounted on an external wall near an existing indoor circuit, with a short cable run through one wall, sits toward $1,500. An underground cable run of 25 metres or more to a detached shed, with trenching through established gardens, a dedicated sub-board, and heavy-gauge cable for voltage drop compliance, pushes toward $4,500.
City and Regional Price Comparison
Prices vary by city and by property type within each city.
At the city level, Sydney is the baseline at $1,500–$4,500 per job. Melbourne and Brisbane track close to Sydney. Perth and Adelaide typically run 10 to 15% above Sydney due to smaller contractor pools and higher material logistics costs. Brisbane's outdoor living culture drives high demand, while its subtropical weather requires higher-rated weatherproofing on all exposed fittings.
Within any city, the primary variable is cable run distance. Compact inner-city blocks (Newtown in Sydney, Fitzroy in Melbourne) constrain routing options but keep distances short. Perth's larger suburban blocks of 600 to 800 square metres often mean 25 to 35-metre underground runs to back sheds, pushing costs higher. Soil type matters too: sandy coastal soil trenches easily, while limestone in Perth's northern suburbs or clay in Melbourne's east requires more labour. Properties with existing nearby power (a GPO or light on the other side of the target wall) save substantially on cable and labour compared to new runs from the switchboard.
How We Calculate
Estimates are based on current licensed Electrician rates, adjusted for regional labour markets and typical property types. All prices include GST. We factor in standard cable runs, weatherproof fittings, circuit protection, and typical job complexity. Switchboard upgrades, landscaping reinstatement, or pool zone compliance are excluded and would be quoted separately by your Electrician.