Every Perth home is different, so every hot water job is a little different too. This guide sets out realistic 2026 price ranges by system type, what actually drives the cost up or down, and when a repair still beats replacement.
What drives the price
People searching for hot water system cost Perth usually want one thing: a realistic number before they commit to a call-out. The honest answer depends on a handful of factors, and Gecko Plumbing always confirms the exact figure with a free fixed quote before any work starts — but the main things that move the price are fairly predictable.
System type matters most. A gas storage water heater, an electric storage unit, a continuous flow (instant) system and a solar or heat pump system all sit at different price points, largely because the equipment and labour involved differ. Tank size is the next biggest factor — a larger household needing a bigger tank pays more than a couple in a two-bedroom home.
A like-for-like replacement, where the new system goes in the same spot as the old one, is almost always cheaper than an upgrade that changes fuel type, moves the unit's location, or needs new pipework, flueing or electrical capacity. Access matters too: a straight swap in an easy-access spot is quicker and cheaper than a unit tucked in a tight roof space or awkward side alley.
Keep in mind
Call Gecko Plumbing for a free, no-obligation fixed quote.
Call NowPrice ranges
These are general market estimates for a standard installation, not a fixed price for your specific job. Access issues, upgrades and site-specific work can move a job outside these ranges in either direction.
A standard like-for-like gas storage replacement, installed, is typically around $2,900 — Gecko Plumbing's usual reference price for this job across Perth.
Usually a little cheaper than an equivalent gas system, mainly because the installation work is generally more straightforward.
Gas or electric continuous flow units sit in a similar range to slightly above standard storage, depending on the model and any pipework or electrical changes needed.
The higher end of the range. More expensive equipment and installation, offset by lower running costs over the system's life.
Repair vs replace
Not every hot water problem needs a full replacement. If the system is a few years old and the fault is minor — a thermostat, a valve, an element — and the rest of the unit is sound, a repair is usually the cheaper, sensible option. Gecko Plumbing won't push a replacement when a repair will genuinely do the job.
Replacement makes more sense once the system is old, has failed more than once, is leaking from the tank itself rather than a fitting, or the repair quote creeps close to a new unit's price. A leaking tank can't be repaired — it needs replacing — and an old unit needing repeat call-outs usually costs more over time than a single replacement.
Glenn's rule of thumb: a small repair on a young system is worth doing. Once the repair cost approaches half the price of a new water heater, or the tank is past 8–10 years old, replacement is almost always the better spend long term.
Rebates
Certain heat pump and solar hot water systems may be eligible for government rebates, but eligibility and amounts change and depend on your specific circumstances. Rather than guess, ask Glenn for current eligibility when you get your quote — he'll give you a straight answer, not a sales pitch.
Call for honest advice before you spend a cent.
Call NowBrands we install
The brand you choose affects price too. Gecko Plumbing supplies and installs Rheem, Rinnai, Bosch, Everhot and Dux systems across Perth, and Glenn will recommend the option that fits your household size and budget rather than pushing the most expensive unit on the van. Fully licensed under PL 7280 / GF 013284, every job comes with a proper fixed quote and a clean installation.
A reliable, well-known option across gas and electric storage and continuous flow, with solid warranty support.
Best known for compact, wall-mounted continuous flow units — a good pick if space is tight.
Efficient continuous flow systems that suit smaller Perth households looking to keep running costs down.
Australian-made and competitively priced — a practical choice for straightforward like-for-like replacements.
Over a century of Australian-made storage systems, built for durability rather than bells and whistles.
Call 0414 361 694 and Glenn will match a brand and system type to your household and price range.
Related guides
How heat pump systems work, running costs and whether one suits your Perth home.
Read the guideA straight comparison to help you decide which fuel type makes sense for your household.
Read the guideThe full rundown on Gecko Plumbing's replacement service across Perth.
Read moreFAQ
A standard like-for-like gas storage replacement, installed, typically runs around $2,900 in Perth. Electric storage is usually a bit cheaper, continuous flow sits in a similar to slightly higher range, and solar or heat pump systems cost more upfront. Gecko Plumbing always confirms the exact figure with a free fixed quote before any work starts.
Generally yes. A straightforward electric storage replacement is usually a little cheaper installed than an equivalent gas storage system, mainly because the installation work involved is simpler. Running costs can differ though, so it is worth weighing purchase price against ongoing electricity or gas costs.
Solar and heat pump systems use more expensive components and often more involved installation, so the upfront price is higher than a standard gas or electric storage unit. They can cost less to run over time, and some heat pump and solar systems may qualify for government rebates, so ask Glenn for current eligibility when you get your quote.
Sometimes, but not always. A minor fault on a younger system is often worth repairing. An old tank, a leaking cylinder, or a system that keeps failing usually means the repair bill is better spent on a new unit. Gecko Plumbing gives straight advice on which option actually makes financial sense for your situation.
Yes. Gecko Plumbing always provides a free, fixed quote before any work begins, so you know the exact cost upfront with no surprises on the invoice.
Gecko Plumbing services Perth's northern suburbs and beyond, including Karrinyup and Scarborough. Wherever you're based, get in contact for a free, fixed quote before any work starts.
Call now for a free, fixed quote — no guesswork, no surprises.
