How much does an irrigation installer cost?

On this page

How an irrigation installer works out the price
What it costs, by scenario
What changes the price
What's usually included, and what isn't
Metro and regional differences
Licensing and compliance
Before you accept a quote, check
Frequently asked questions
Sources and method

How an irrigation installer works out the price

An installer usually prices a new system by the number of zones, because each zone needs its own valve, wiring and pipe run. Trenching, the controller, a backflow device and the connection to the water supply are then added. Drip systems for garden beds are often priced per zone too. Repairs and servicing are usually a call-out fee plus time and parts.

Site visit and design: area to be watered, plant types and water pressure
Number of zones, each with a valve and its own run of pipe
Sprinkler heads, drip line, controller and any sensors
Trenching and pipe laying, sometimes included in a lump sum
Backflow prevention device and connection to the mains, tank or bore
Testing, setting the program and handover

Worked example: Smart controller and backflow device added to an existing system (illustrative, not a quote)

Service call-out and inspection: $250
Smart controller, supplied and installed: $550
Backflow device, supplied and installed: $1,000
Total: $1,800 total (illustrative)

What it costs, by scenario

Low, typical and high prices. Built on 19 October 2026 from two installer and trade-business price pages, two compiled Australian cost guides, an Airtasker category page and state regulator pages. Each range sits inside figures that at least two sources share where we could find two; GST basis is not confirmed by most sources.

Drip system, one zone, garden beds (per job)
The range two sources share. One includes a tap timer. A full-garden drip system with several zones costs more.
Low
$840
Typical
$1,475
High
$2,000
Small sprinkler system, two to three zones (per job)
One source only, from a trade business. Per-zone prices elsewhere ($400 to $1,200) point the same way, but we did not find a second price for the whole job.
Low
$1,800
Typical
$2,400
High
$3,000
Automatic sprinkler system, front and back garden (per job)
The range that four sources share. Each source's full range runs wider, from $2,500 to $6,300, with the top end for larger gardens or harder trenching.
Low
$3,000
Typical
$4,000
High
$5,500
Smart controller fitted to an existing system (per job)
Controller plus installation. The low end is one trade business's supply and fitting figures added together.
Low
$370
Typical
$550
High
$800
Backflow device, supplied and installed (per job)
The device plus fitting. Annual testing, where required, is extra at about $120 to $300.
Low
$700
Typical
$1,000
High
$1,300
Service call-out to diagnose and repair a fault (per visit)
One source only (a Queensland installer guide). Parts are extra.
Low
$150
Typical
$250
High
$400

Low, typical and high prices by scenario
Scenario	Low	Typical	High
Drip system, one zone, garden beds (per job)The range two sources share. One includes a tap timer. A full-garden drip system with several zones costs more.	$840	$1,475	$2,000
Small sprinkler system, two to three zones (per job)One source only, from a trade business. Per-zone prices elsewhere ($400 to $1,200) point the same way, but we did not find a second price for the whole job.	$1,800	$2,400	$3,000
Automatic sprinkler system, front and back garden (per job)The range that four sources share. Each source's full range runs wider, from $2,500 to $6,300, with the top end for larger gardens or harder trenching.	$3,000	$4,000	$5,500
Smart controller fitted to an existing system (per job)Controller plus installation. The low end is one trade business's supply and fitting figures added together.	$370	$550	$800
Backflow device, supplied and installed (per job)The device plus fitting. Annual testing, where required, is extra at about $120 to $300.	$700	$1,000	$1,300
Service call-out to diagnose and repair a fault (per visit)One source only (a Queensland installer guide). Parts are extra.	$150	$250	$400

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What changes the price

Number of zones. Each zone adds a valve, wiring and pipe. One source puts it at about $600 to $900 a zone and another at $400 to $1,200 for pop-up sprinklers.
Trenching and ground. Rock, clay, concrete or established gardens slow the work. One source prices trenching at $35 to $60 a metre when it is not in a lump sum.
Drip or spray. Drip line costs a little more to lay per metre than spray heads, but it suits garden beds and uses water more precisely.
Controller type. A smart controller costs more up front than a basic timer. Soil moisture sensors add $80 to $250 each in one source.
Water source. Mains, a rainwater tank or a bore each need different pumps, filters and switching. Switching between mains and tank adds about $400 to $1,200 in one source.
Backflow protection. A backflow device protects drinking water and is often required. It adds a device, fitting and, in some places, yearly testing.

What's usually included, and what isn't

Usually included

Design of the zones and the pipe layout
Valves, pipe, sprinklers or drip line and a controller
Trenching and laying pipe, where the quote says it is included
Connection to the water supply
Testing the system and setting the watering program

Often extra

Landscaping, turf or garden bed repairs after trenching
A pump, tank or bore, unless quoted
Annual backflow testing and seasonal servicing
Council or water provider fees and any plumbing permit
Removal of an old system

Metro and regional differences

Metro: Cities have many installers, so quotes are easier to compare, but wages, parking and travel time lift hourly rates. Airtasker's city averages for this job range from $50 to $65 in Brisbane and the Gold Coast to $129 to $204 in Melbourne, though that page does not say what each figure covers.

Regional: We did not find separate regional prices. Longer travel can add to the call-out fee, there may be fewer installers to compare, and bore or tank systems are more common outside the cities, which adds pumps and filters to the job.

Licensing and compliance

Whether an irrigation installer needs a licence depends on the state, and we could confirm only some of them.

Queensland: the QBCC lists installing or maintaining an irrigation or lawn watering system downstream from a tap, isolating valve or backflow device as unregulated plumbing, so no QBCC licence is needed for that part, though minimum standards still apply (guide last reviewed 15 September 2021).

Work on the supply side of that point is not covered by that page, so ask.

New South Wales: Building Commission NSW licenses plumbers, and its licence description says water plumbing includes urban irrigation.

We did not confirm whether a gardener's sprinkler work downstream of the meter is exempt.

Western Australia: the Plumbers Licensing Board, through Building and Energy (Department of Mines, Industry Regulation and Safety), says cutting a tee into the property supply and fitting the isolating valve and backflow device for an irrigation system is major plumbing work.

A notice must be lodged at least 24 hours before and a certificate of compliance within five working days after (technical note, version 3, May 2023).

Australian Capital Territory: the Environment, Planning and Sustainable Development Directorate licenses an irrigation plumber class, and Access Canberra requires backflow devices to be registered and tested every 12 months by a plumber with a backflow testing endorsement.

We could not open the Victorian, South Australian, Tasmanian or Northern Territory regulator pages for irrigation work (the Building and Plumbing Commission in Victoria, Consumer and Business Services in South Australia, Consumer, Building and Occupational Services in Tasmania, and the Plumbers and Drainers Licensing Board in the Northern Territory), so we make no claim about them.

Ask any installer for a licence number, check it on the state register, and ask what certificate or notice applies.

Before you accept a quote, check

How many zones does the quote include, and what does each zone cover?
Is trenching and making good the lawn included, or extra?
Is a backflow device included, and who tests it each year?
Is the controller a basic timer or a smart controller, and which brand?
Does the quote say whether GST is included?
Which licence does the installer hold, and will you get any certificate the job needs?

Frequently asked questions

How much does a new sprinkler system cost in Australia?

For a front and back garden with several zones, our sources share a range of about $3,000 to $5,500 installed. Individual sources run from $2,500 to $6,300 depending on garden size and trenching.

Is drip irrigation cheaper than sprinklers?

Not always. Drip line costs a little more to lay per metre than spray heads. A single drip zone for garden beds is about $840 to $2,000, and it can use water more precisely.

Is a smart controller worth the extra cost?

It costs more up front. Fitting one to an existing system is about $370 to $800. Whether it saves water depends on your garden and how you now water, and our sources do not put a figure on savings.

Do I need a backflow device?

Often. Devices are used where an irrigation system or rainwater tank is connected to the drinking water supply. Western Australia requires backflow protection on all irrigation systems under AS/NZS 3500.1, and the ACT requires yearly testing. Check the rule where you live.

How often should an irrigation system be serviced?

Airtasker's guide suggests maintenance each spring and autumn. One Queensland installer guide prices seasonal servicing at about $200 to $500 a year.

Can I connect a rainwater tank or bore to my system?

Usually, but it needs the right pump and switching. One source adds about $400 to $1,200 for switching between mains and tank. Some states have extra licensing for tank work, so ask the installer.

Sources and method

Built on 19 October 2026 from two installer and trade-business price pages, two compiled Australian cost guides, an Airtasker category page and state regulator pages. Each range sits inside figures that at least two sources share where we could find two; GST basis is not confirmed by most sources. How we calculate our guides.

Airtasker: irrigation installation cost (category guide, last updated 17 January 2023) (marketplace, 17 January 2023)
What's The Damage: irrigation system and drainage cost Australia (compiled guide) (survey, 19 October 2026)
What's The Damage: landscaping cost Perth (compiled guide; states prices include GST) (survey, 19 October 2026)
The Quote Yard: irrigation systems Queensland (business price page) (supplier, 8 September 2026)
Trade Heroes: how much does irrigation system installation cost (business price page) (supplier, 23 July 2026)
QBCC: unregulated plumbing guide (regulator, 15 September 2021)
business.gov.au ABLIS: NSW plumbing contractor licence (Building Commission NSW) (regulator, 19 October 2026)
Building and Energy WA: miscellaneous technical note A (version 3, May 2023) (regulator, 1 May 2023)
Access Canberra: backflow prevention (regulator, 19 October 2026)
business.gov.au ABLIS: ACT plumber and drainer licence (regulator, 19 October 2026)

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