At a Glance
Electric hot water system installation in Australia typically costs $1,200–$3,000 per job, covering the unit, electrical connection, plumbing hookup, and tempering valve. Prices vary by city, system type (resistive storage tank vs heat pump), and whether your switchboard needs a dedicated circuit added. Sydney is the baseline, with Perth and Adelaide running 10–15% higher.
What's Included
A typical electric hot water installation covers:
- Supply and delivery of the hot water unit (storage tank or heat pump)
- Electrical connection to AS/NZS 3000 Wiring Rules, including a dedicated circuit from the switchboard with its own circuit breaker
- Plumbing connection for hot and cold supply lines, pressure relief valve, and drainage
- Tempering valve as required by AS 3498 to cap delivery temperature at 50°C at bathroom fixtures
- Removal and disposal of the old unit
- Commissioning and testing of heating elements, thermostat calibration, and relief valve operation
Not typically included: switchboard upgrades (if no spare circuit breakers), relocating the unit to a new position, or upgrading supply pipework from the meter.
What Affects the Cost
- System type : heat pumps cost more upfront than resistive storage tanks but use 60–70% less energy. Government rebates in NSW, Victoria, and SA can close most of the price gap.
- Tank capacity : a 1–2 person household needs 160–250L, while a family of 4+ typically requires 315–400L. Larger tanks cost more to buy, deliver, and install.
- Switchboard capacity : older boards without a spare circuit breaker need an upgrade before installation. Common in pre-2000 homes across all cities.
- Existing wiring : replacing a like-for-like unit on an existing dedicated circuit is the cheapest scenario. New installations or system type changes often need new cabling.
- Relocation : moving the unit to a different position adds plumbing runs, electrical cable, and potentially drainage work.
- Access : roof-mounted tanks, tight laundries, and apartment plant rooms increase labour time. Ground-level slabs beside the house are the simplest.
A straightforward like-for-like tank replacement on an existing dedicated circuit, with ground-level access, sits toward $1,200. Switching from gas to heat pump in an older property that needs a switchboard upgrade, new dedicated circuit, and full system replacement pushes toward $3,000.
Hot water system failures are often urgent, leaving the household without hot water. After-hours, weekend, and emergency callouts carry premium rates compared to scheduled business-hours work. If the system is still producing some hot water, booking during business hours saves money.
City and Regional Price Comparison
City-level differences: Sydney (NSW) sets the baseline. Melbourne and Brisbane track within 5% of Sydney pricing, driven by similar labour markets and equipment supply chains. Perth and Adelaide run 10–15% higher due to smaller trade pools and higher equipment transport costs.
State rebate programs shift the effective cost significantly. The NSW Energy Savings Scheme and Victorian Energy Upgrades (VEU) program both offer substantial rebates on heat pump installations, often making heat pumps price-competitive with basic storage tanks after the rebate. South Australia's REPS program provides rebates through energy retailers. Queensland and WA have less consistent state-level incentives.
Suburb and regional-level differences: Within any city, the main cost variables are property age, switchboard condition, and access. Inner-city homes in suburbs like Marrickville (Sydney), Fitzroy (Melbourne), or Prospect (Adelaide) typically have older switchboards with ceramic fuses or rewirable fuse wire, meaning a board upgrade adds to the installation cost. New-build estates in outer suburbs like Oran Park (Sydney), Tarneit (Melbourne), or Springfield (Brisbane) usually have modern boards with spare capacity, keeping the job straightforward. Elevated Queenslander homes in Brisbane's inner suburbs provide easy sub-floor access for plumbing connections, while apartment buildings across all cities add complexity through strata approvals, restricted work hours, and shared plant rooms.
How We Calculate
Estimates are based on current licensed Electrician rates adjusted for each state, typical equipment costs from major Australian suppliers, and standard installation complexity. All prices include GST. Ranges reflect the difference between a straightforward like-for-like replacement and a new installation requiring switchboard work or system type change. State rebates are not deducted from displayed ranges.