Replacing a hot water system in Hobart costs about $720 to $6,300 installed in 2026, depending on the type of system. A like-for-like electric storage tank swap typically costs around $1,625. A gas storage or gas continuous flow unit typically costs about $1,975 installed. A heat pump runs $2,700 to $5,400 before the federal STC discount, and solar hot water sits at the top at $3,150 to $6,300.
Those figures cover the unit and the labour. Tasmania is different from the mainland states in one way that matters: there is no state cash rebate for hot water in 2026, and the 0% Energy Saver Loan Scheme closed in September 2025. The only incentive left is the federal STC discount, which is why the gap between an electric tank and a heat pump is wider in Hobart than in Melbourne or Sydney. At Solus Plumbing, our teams replace hot water systems across six capital cities every week, and every new installation comes with a 5-year workmanship warranty. In our experience, the two things that catch homeowners out are the compliance items added to a quote, and choosing a system that cannot keep up with a Hobart winter.
This guide covers 2026 Hobart prices by system type, the extra fees on a quote, what incentives still apply in Tasmania, running costs on Aurora Energy tariffs, and how to size a system without overspending.
Hot water system replacement prices in Hobart at a glance
| System type | Installed cost in Hobart (2026) | Typical quote | Unit price only |
| Electric storage tank | $720 to $2,700 | $1,625 | $500 to $3,500 |
| Gas storage tank | $1,075 to $3,150 | $1,975 | $700 to $3,000 |
| Gas continuous flow | $1,350 to $3,150 | $1,975 | Often cheaper than a tank |
| Heat pump (before STCs) | $2,700 to $5,400 | $3,775 | $2,200 to $6,000 |
| Heat pump (after STCs) | $2,250 to $4,775 | $3,250 | As above |
| Solar hot water | $3,150 to $6,300 | $4,500 | $4,000 to $6,000 |
Installed ranges come from an independent Hobart hot water cost guide verified in October 2026 and include supply, installation and GST. Unit-only prices are from the CHOICE hot water buying guide. The low end of each range is a small or basic unit in an easy location. The high end is a large or premium unit, a relocation, or a changeover from one fuel type to another.
How much does it cost to replace an electric hot water system in Hobart?
Replacing an electric storage hot water system in Hobart costs about $720 to $2,700 installed, with a typical quote around $1,625. A straight swap of a 160 to 250 litre tank in the same spot, reusing the existing wiring and pipework, sits at the lower end. Large 315 to 400 litre tanks and jobs that need the unit moved sit at the top.
Electric storage is the cheapest system to buy and install because it needs no gas fitting and no roof work. It is also the most common system in Hobart. Around half of Australian homes use an electric storage tank, and reticulated gas only reaches some Hobart suburbs, so electric is the default here. The trade-off is the running cost. A standard electric tank in Hobart costs about $450 to $1,075 a year to run, with $720 being typical, which is the highest of any system type.
The saving grace in Tasmania is the off-peak tariff. Aurora Energy Tariff 62 heats water overnight at a much lower rate than the general tariff, which is why most Hobart homes with electric storage run a 250 litre or larger tank that heats between 10pm and 7am. If your current tank is on Tariff 41 or 61, both now closed to new connections, ask your plumber and electrician whether the replacement can stay on the same circuit.
How much does a gas hot water system cost to replace in Hobart?
A gas storage hot water system costs about $1,075 to $3,150 installed in Hobart, with a typical quote of $1,975. Gas continuous flow (also called instantaneous or tankless) costs about $1,350 to $3,150 installed, also typically around $1,975.
Gas is less common in Hobart than in mainland capitals, because natural gas only reaches some suburbs. Outside the reticulated network, gas hot water runs on bottled LPG, and CHOICE notes LPG can cost significantly more than natural gas. That changes the maths. A gas unit on reticulated gas is cheap to run. The same unit on LPG can cost more per year than an off-peak electric tank.
Gas also costs more to install than electric for two reasons:
- A gas-fitting licence is required. Tasmania treats gas-fitting as a separate licence from plumbing, so the person connecting the unit must hold both.
- Gas line work. Swapping a storage tank for a continuous flow unit often needs a larger gas supply line, because continuous flow units draw more gas on demand.
Continuous flow units must be installed outdoors or in a vented space. Our gas fitting team handles the gas connection and pressure test as part of an installation, and a good Hobart plumber will do the same rather than bringing in a second trade.
How much does a heat pump hot water system cost in Hobart?
A heat pump hot water system costs about $2,700 to $5,400 installed in Hobart before rebates, with a typical quote around $3,775. After the federal STC discount, the typical out-of-pocket cost drops to about $3,250, with a range of $2,250 to $4,775.
Heat pumps are electric systems that pull heat from the surrounding air rather than heating water with an element. They use roughly a third of the electricity of a standard electric tank, which brings a typical running cost down to a few hundred dollars a year. Common brands include Rheem AmbiHeat, Sanden, iStore and Reclaim Energy.
Size affects the price:
- 250 to 270 litre heat pump for 1 to 3 people: $2,700 to $5,400 installed, typically $3,425
- 300 to 315 litre heat pump for 3 to 5 people: $3,050 to $6,300 installed, typically $4,050
Do heat pumps work in Hobart’s climate?
Yes, but the model matters more in Hobart than anywhere else in Australia. Heat pumps still work in the cold, but they run longer when the air is close to freezing. Some models switch to a backup element below a certain temperature, and that element runs at the full electric rate, which eats into the savings. Before you sign, ask for the unit’s rated operating range and confirm it covers Hobart’s winter overnight lows. Ask whether the model has a backup element and when it kicks in.
Two more Hobart-specific points. The compressor makes some noise and needs clear airflow, so the unit cannot always go where the old tank sat in a tight subfloor or a weatherboard lean-to. And a heat pump heats water slowly, so a 270 litre heat pump is sized like a 160 litre electric tank. Undersizing a heat pump is the most common way to end up with lukewarm showers in July.
How much does solar hot water cost in Hobart?
Solar hot water costs about $3,150 to $6,300 installed in Hobart, with a typical quote around $4,500. That is before the federal STC discount, which applies to solar hot water as well as heat pumps.
Solar systems are usually sized at 300 to 360 litres with an electric or gas booster for cloudy days, and CHOICE suggests about 4 square metres of roof collector for a four-person home. They have the highest upfront cost of any system and the lowest running cost from spring to autumn. Hobart’s winters are a different story. The booster runs far more here than it does in Brisbane or Perth, so running costs are higher than national brochures suggest, and a heat pump often delivers a similar annual bill for less money upfront.
Installation cost depends on roof access and whether the tank sits on the roof (close-coupled) or on the ground (split system). Two-storey homes, tiled roofs and shaded or south-facing roofs take longer and may need evacuated tube collectors, which cost more than flat plates. Hobart’s hilly suburbs make roof access harder than in flatter cities, which shows up in the labour line of a quote.
What extra fees get added to a hot water replacement quote in Hobart?
Most Hobart hot water quotes include a few items beyond the unit and the basic labour. The common ones are:
| Extra item | Typical Hobart cost | When it applies |
| Tempering valve | $135 to $360, typically $225 | Where the old system did not have one |
| Old unit removal and disposal | $68 to $180, typically $115 | Almost every replacement |
| Pressure limiting valve | Quoted per job | Where mains pressure is too high for the new tank |
| Relief drain line | Quoted per job | Where the old install had no compliant drain line |
| Electrical work | Quoted per job | Heat pumps on a new circuit, or tariff changes on old electric tanks |
| Gas line upgrade | Quoted per job | Storage-to-continuous-flow conversions |
| Council notification or permit | Quoted per job | Only when the unit moves to a new location |
The tempering valve catches most people out. Tasmania’s heated water rules require tempering valves to showers, baths and basins to be set to 50 degrees Celsius to prevent scalding, while the tank must store water at no less than 60 degrees to kill Legionella bacteria. A tempering valve is what makes both possible. Older tanks in Battery Point, New Town and Moonah cottages often never had one, so it gets added as a replacement.
Labour is the other variable. Hobart plumbers charge about $80 to $200 an hour, with call-out fees of $60 to $250, as covered in our Hobart plumber cost guide. A like-for-like swap takes 2 to 4 hours. Moving the unit, running a new gas line or working on a steep roof can take most of a day.
When we quote a replacement at Solus Plumbing, we list these items separately so you can see what is the unit, what is labour and what is compliance work. If any quote is a single lump sum, ask for it to be broken down. Two quotes that look $400 apart are often quoting different jobs.
What hot water rebates are available in Hobart in 2026?
Hobart homeowners can claim one incentive on an efficient hot water replacement in 2026: federal Small-scale Technology Certificates (STCs). There is no Tasmanian state rebate for hot water, and the state’s interest-free loan has closed.
Federal STCs
STCs apply to heat pumps and solar hot water under the federal Small-scale Renewable Energy Scheme. The number of certificates depends on the model, the system’s rated performance and your climate zone, and the installer usually claims them and shows the value as a discount on the invoice. On a 270 to 315 litre heat pump in Hobart, the discount typically brings a $3,775 quote down to around $3,250.
The scheme ends in 2030, and the number of certificates a system earns falls each year as that date approaches, so a heat pump installed in 2026 attracts a slightly bigger discount than the same unit installed in 2027. Ask the installer to show the STC value as a separate line, because the certificate price moves with the market and a vague “after rebate” figure can hide a smaller discount than you expected.
Tasmania’s Energy Saver Loan Scheme has closed
The Tasmanian Government’s Energy Saver Loan Scheme offered 0% loans of $500 to $10,000 for heat pump and solar hot water systems, repaid over 1 to 3 years through Brighte. It closed to new applications on 1 September 2025, and all approved installations had to be completed by 30 November 2025. You will still see it mentioned in older articles and some installer brochures, so check the date on anything that promises an interest-free loan.
As of October 2026 there is no replacement program. The Tasmanian Government’s ReCFIT site is the place to check for any new scheme before you sign a quote, and a reputable installer will tell you plainly if nothing applies.
What that means for your quote
| Replacement scenario | Before incentives | Typical STC discount | Typical cost after incentives |
| Electric tank to electric tank | $1,625 | None | $1,625 |
| Electric tank to heat pump | $3,775 | About $500 | About $3,250 |
| Electric or gas to solar | $4,500 | Varies by system | $3,500 to $4,000 |
Without a state rebate, the payback on a heat pump in Hobart comes from running costs alone. Switching from a $720-a-year electric tank to a heat pump saves roughly $400 to $500 a year, so the $1,600 premium over a new electric tank typically pays back in 3 to 4 years, well inside the 10 to 15 year life of the unit.
How much does a hot water system cost to run in Hobart?
Running cost is where Hobart differs most from the mainland, because Tasmania’s electricity is largely hydro and the off-peak tariff is cheap. The table below uses Aurora Energy’s residential tariff rates effective 1 July 2026, including GST.
| System | How it is billed | Energy rate | Approximate running cost per year |
| Electric storage on general tariff | General or Tariff 93 peak | Up to about 36 c/kWh | $720 typical, up to $1,075 |
| Electric storage on off-peak | Tariff 62 (10pm to 7am) | About 14 c/kWh | Roughly 40% of the general-tariff figure |
| Heat pump | Any tariff, uses about a third of the energy | Depends on tariff | A few hundred dollars |
| Gas (reticulated) | Gas account | Varies | Lower than general-tariff electric |
| Gas (LPG bottles) | Bottle refills | Significantly higher than natural gas | Can exceed off-peak electric |
| Solar with booster | Booster on electric or gas | Depends on booster | Lowest in summer, booster-heavy in winter |
Water heating makes up about a quarter of a typical household’s energy use, so the running cost difference between systems adds up over the life of the unit. Tariff 62 is limited to 9 hours overnight, which is why off-peak tanks need to be bigger: they heat once and have to last all day. Tariffs 41 and 61 are still billed for existing connections but closed to new ones. A new installation may need a tariff change through Aurora, and your electrician should flag that before the job.
Is it cheaper to repair or replace a hot water system in Hobart?
Repairing a hot water system is usually cheaper if the unit is under 8 years old and the fault is a valve, thermostat, element or anode. Replacement is usually the better choice once the tank itself is leaking, or the system is 10 or more years old and needs a repair worth more than a third of a new unit.
A leaking tank cannot be repaired. Once the cylinder has corroded through, the only fix is a new system. For everything else, a general hot water repair in Hobart costs about $135 to $450, with these common jobs inside that range:
- Thermostat, element or gas valve replacement: usually at the lower to middle end
- Anode replacement: $180 to $450, and worth doing every five years on a glass-lined tank to extend its life
- Tempering or relief valve replacement: $135 to $360
Warranty tells you a lot about expected life. Glass-lined steel tanks typically carry a 5 to 10 year warranty, stainless steel tanks 10 to 15 years, and heat pump compressors often have a separate, shorter warranty than the tank they sit on. If your tank is outside its warranty and needs anything more than a valve, get a replacement price at the same time as the repair price.
When we attend a hot water fault, we charge a $99 diagnostic fee on the first visit and credit it against the repair or replacement once you approve the price. Many Hobart plumbers work the same way, so ask before you book.
How much does an emergency hot water replacement cost in Hobart?
An urgent same-day like-for-like replacement in Hobart costs about $1,175 to $3,600, with a typical price of $2,075. That is several hundred dollars more than the same swap booked for a weekday, and the gap widens on weekends and public holidays, when after-hours plumbing labour runs about 1.5 to 2 times the daytime rate.
If the tank is only leaking slowly, you can often avoid the premium. Turn off the cold water inlet valve on the tank and switch off the power at the switchboard or the gas at the unit, then book the replacement for the next business day. Most Hobart plumbers carry common 250 and 315 litre electric units on the van, so a like-for-like swap can usually be done the day you call. Heat pumps and solar systems are rarely in stock on the truck, so a changeover takes a little planning. Some installers will lend a temporary electric unit so you are not without hot water in the meantime.
What size hot water system does a Hobart home need?
A typical person uses about 50 litres of hot water a day, so most Hobart households need a 125 to 315 litre storage tank or a 16 to 26 litre per minute continuous flow unit. Oversizing is one of the most common ways people overspend on a replacement, and undersizing a heat pump or an off-peak tank is the most common way to run out of hot water in winter.
For a four-person household, the CHOICE buying guide suggests:
- Electric storage: 125 to 160 litres on a general tariff, or 250 to 315 litres on off-peak
- Gas storage: 135 to 170 litres
- Heat pump: 270 to 315 litres
- Solar: 300 to 360 litres plus about 4 square metres of collector
Hobart pushes you toward the larger end of each range. Cold incoming mains water in winter means the tank has to add more heat to every litre, and off-peak tanks only get 9 hours to do it. Continuous flow units are sized by flow rate rather than storage, and the same cold inlet water reduces their flow in winter, so size them for July rather than January.
Do you need a permit to replace a hot water system in Hobart?
Not for a straight swap. Tasmania’s heated water rules say replacing a system with a like-for-like model in the same location does not need a plumbing permit, but a licensed plumber must do the work. Moving the unit changes that:
- New location, existing water service: a licensed plumber must notify the council’s Permit Authority after the work is finished
- New location, new water service: a plumbing permit must be obtained before work begins
Council approval is where Hobart quotes can diverge. Some plumbers add a margin to jobs in the Hobart City Council area to cover inspection delays, which mainly affects relocations and new services rather than simple swaps. If two quotes for the same relocation differ by more than a few hundred dollars, ask each plumber whether they have allowed for council time.
Every hot water replacement in Tasmania must be done by a licensed plumber, and gas units need a gas-fitting licence as well. You can check any plumber for free on the CBOS find a licensed tradesperson register. Unlicensed work can void the manufacturer’s warranty and cause problems with insurance claims, so ask for the licence number before the job starts. Our guide to choosing a plumber in Hobart covers the other checks worth running.
Frequently asked questions
How long does it take to replace a hot water system in Hobart?
A like-for-like hot water replacement usually takes 2 to 4 hours. Changeovers that need a new gas line, a dedicated electrical circuit or a relocated heat pump can take most of a day, and a relocation may add council notification time.
Is there a government rebate for heat pump hot water in Tasmania?
Only the federal STC discount. Tasmania has no state hot water rebate in 2026, and the 0% Energy Saver Loan Scheme closed on 1 September 2025.
How much does it cost to switch from electric to a heat pump in Hobart?
Switching from an electric tank to a heat pump in Hobart typically costs about $3,250 after the STC discount in 2026, or about $3,775 before it. That is around $1,600 more than a like-for-like electric swap, and the running-cost saving usually recovers the difference in 3 to 4 years.
Does a hot water replacement include removing the old unit?
Usually, but not always. Removal and disposal of the old tank is typically $68 to $180 in Hobart and should be listed on the quote. If it is not mentioned, ask, because some installers leave the old unit on site.
Can I replace my hot water system myself in Tasmania?
No. In Tasmania, replacing a hot water system is licensed plumbing work, and a gas unit also needs a licensed gas-fitter. DIY installation is illegal, voids the unit’s warranty and can create a scalding or Legionella risk if the tempering valve and storage temperature are wrong.
How does Hobart compare with Melbourne for hot water replacement?
Installed prices are similar, but Melbourne homeowners can combine a Solar Victoria rebate and a Victorian Energy Upgrades discount worth up to $1,630 on a heat pump or solar system. Hobart has no equivalent. Heat pump quotes in Hobart tend to start lower, so the final out-of-pocket cost often lands in a similar place, but Hobart buyers get there without any state help.
How long does a hot water system last?
Most storage tanks last around 10 to 15 years, and continuous flow units often last longer because there is no tank to corrode. Replacing the sacrificial anode every five years can add several years to a glass-lined tank’s life.
Get a clear price for your hot water replacement
Budget about $1,625 for a like-for-like electric tank swap, $1,975 for gas, and $3,775 to $4,500 for a heat pump or solar system before the STC discount. Then allow $200 to $550 for compliance items like a tempering valve and old unit disposal. Without a state rebate, pick the system on running cost and winter performance, get at least two itemised quotes for any changeover, and check the plumber’s licence on the CBOS register before work starts.
Solus Plumbing does not currently service Tasmania, so use this guide to sense-check your Hobart quotes and find a good local installer. If you are in Sydney, Melbourne, Brisbane, Perth, Adelaide or Canberra, our hot water system team installs Rheem, Rinnai, Dux, Bosch, Thermann and Vulcan units, gives you a fixed written price before we start, and backs every new installation with a 5-year workmanship warranty on top of the manufacturer’s warranty. Call Solus Plumbing on 1300 730 896 or request a quote.
