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Updated monthlyKatherine ducted price guide

Ducted air conditioning
cost in Katherine

Ducted air conditioning costs $11,800–$17,800 installed in Katherine, single-storey zoned systems from $11,800, two-storey systems from $14,800, with roof access and zone count driving the spread.

Ducted quotes for Katherine

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Katherine ducted installed price range

Like-for-like changeover (ducts reused)
$11,800–$14,800
New ducted, single storey, zoned
$11,800–$14,800
New ducted, two storey, zoned
$14,800–$17,800

Installed prices, unit + standard back-to-back installation. Shared scale.

Real quote data

What Katherine homeowners pay for ducted

JobInstalled priceSuits
Like-for-like changeover (ducts reused) $11,800–$14,800 Existing ducted home, old unit failed
New ducted, single storey, zoned $11,800–$14,800 3-bed single-storey with roof access
New ducted, two storey, zoned $14,800–$17,800 4-bed two-storey family home

Full local pricing across all system types on the Katherine cost guide; national ducted detail on the ducted price guide.

Cost drivers

What moves a Katherine ducted quote

Roof cavity access

The single biggest labour variable. Generous, clear cavities install fast; tight, trussed or insulated-panel roofs add days. Identical floor plans quote differently street to street because of it.

Zone count and controls

Each zone adds motorised dampers, wiring and controller capability. Day/night zoning is the value sweet spot; individual-room zoning with smart control is where quotes climb fastest.

Top End heat inland

Katherine runs hotter than Darwin through the build-up, without the sea breeze. Size generously, the unit works an eight-month season.

Tropical spec throughout

Corrosion-resistant units and tropical-rated installs are the baseline this far north, ask what's specced for the Territory.

Katherine ducted cost questions

How much does ducted air conditioning cost in Katherine?
$11,800–$17,800 installed for most Katherine homes. Single-storey zoned systems run $11,800–$14,800; larger two-storey homes run $14,800–$17,800. Roof cavity access and zone count set where you land, the unit itself is typically only 40–50% of the price.
When is the cheapest time to install aircon in Katherine?
The Dry, May to September. The build-up from October drives the rush and holds prices up through the wet.
Is ducted cheaper if the house already has ducts?
Usually, and by a lot: a like-for-like changeover reusing sound ductwork runs about $11,800–$14,800 in Katherine, skipping most of the labour. Get the ducts inspected first, old leaky runs can eat the saving in running costs and are sometimes worth replacing anyway.
Ducted or multiple splits, which is right for my home?
For 1–3 rooms, splits win on install and running cost. From 4+ daily-use rooms, ducted becomes competitive per room and wins on whole-home coverage and aesthetics. Our split vs ducted calculator runs both totals for your home in thirty seconds, free, no email.
How long does a ducted install take in Katherine?
1–2 days on site for a straightforward single-storey install, 2–3 days for two-storey or complex zoning, after a proper site visit and quote, ducted is never priced accurately over the phone. From the build-up onward, add 2–4 weeks of queue before the crew arrives, book in the Dry.

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