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Skylight Installation Cost Calculator

Estimate Australian 2026 skylight installation cost by size, type (fixed, openable, Solatube), glazing and roof material. Includes flashing, framing, plaster finish and 240V wiring.

Skylight Installation Cost Calculator

Estimate Australian 2026 skylight installation cost by size, type (fixed, openable, Solatube), glazing and roof material — VELUX, Solatube, Coolite, Skydome — to AS 4040 and 2026 AUD labour rates.

Estimated skylight cost
$2,735
Range: $2,325 – $3,282 · Per unit: $2,735
unit + flashing + framing + finish + add-ons
Skylight units
$880
Flashing kits
$285
Framing / cut-in
$720
Plaster / shaft finish
$420
Add-ons
$0
DA fee
$320
Tip fee
$110
Total estimate
$2,735

What this calculator estimates

This calculator quotes the all-in installed price for a residential skylight installation in 2026 Australian dollars. The bill is itemised the way a competent ARC- or HIA-member roofer or licensed contractor writes it:

  • Skylight unit — the manufactured glazed assembly, priced by size and type. VELUX, Solatube, Skydome, Coolite and Velux Australia priced at 2026 trade pricing.
  • Flashing kit — manufacturer-matched flashing profile for Colorbond, Zincalume, tile or membrane. Required for warranty.
  • Framing / cut-in — for retrofit, this includes doubling rafters, upper and lower headers (trimmers), re-sheeting cut sarking and installing sarking-felt collars.
  • Plaster / shaft finish — closing the internal ceiling around the opening, building a plaster shaft if roof space depth requires it, setting and decorating.
  • Add-ons — manual or motorised blinds, rain sensor for Integra units, smart-home controller, new 240V electrical run.
  • DA fee — local council Development Application fee if not exempt.
  • Tip fee — debris removal and waste levy.
  • Weekend / public-holiday premium — 25% surcharge.

A minimum call-out fee of $575 applies in most Australian metros — even a single Solatube install carries this floor because mobilising a 2-person crew, ladders, fall protection and PPE is the dominant cost.

How to use it

  1. Count the units — total skylights installed in one mobilisation. Two units on the same roof slope share access cost.
  2. Pick a size. Small is around 55x55 cm (a Solatube 250 or VELUX M04 dimension). Medium is 55x118 cm (VELUX MK06 — the most common single-rafter Australian residential size). Large is 78x118 cm. Oversize is anything above 114 cm wide — typically a coupled VELUX combination or a custom Skydome.
  3. Pick type. Fixed for stairwells, top-of-stair landings, and inaccessible ceilings. Openable manual for ensuites, kitchens and bathrooms with reachable cranks. Openable electric or solar (Integra) for premium installs and high ceilings. Solatube / sun tunnel for windowless rooms, walk-in robes, butler’s pantries and corridors.
  4. Pick glazing. Argon-filled Low-E double is the 2026 BCA-compliant default. Laminated safety glass is mandatory over a bath, bed or pool under AS 1288. Triple is the cool-climate spec for Tasmania, southern Victoria and the Snowy Mountains region. Toughened Low-E is the cyclone-impact spec for coastal Queensland, NT and northern WA.
  5. Pick roof material. Colorbond / Zincalume is the cost-neutral baseline — fastest install. Terracotta or concrete tile adds 40-50% labour due to tile cutting and re-bedding. Standing-seam metal adds 20%. Natural slate adds 70% (rare in Australia). Flat membrane (TPO / EPDM on a flat extension roof) adds 30% due to curb-mount detail.
  6. Pick work scope. Retrofit (cut a new opening) is the most common scenario and includes framing, flashing, and plaster finish. New build (the carpenter leaves a trimmed opening) is significantly cheaper.
  7. Set storey count. Labour multiplier is 1.0x for single storey, 1.18x for two-storey, 1.42x for three-storey or higher due to access scaffolding and fall protection.
  8. Toggle add-ons. Blinds, rain sensor, smart hub, new 240V run, DA fee, tip fee, and weekend premium each adjust the total.

Typical 2026 Australian skylight installation cost ranges

These ranges reflect 2026 metro pricing from hipages cost guides, ARC member surveys, and direct quotes from VELUX, Solatube, Skydome and Coolite certified installers in Sydney, Melbourne, Brisbane, Perth, Adelaide, Hobart, Darwin and Canberra.

Configuration (Colorbond, retrofit, single storey)2026 installed price
Solatube 250 / sun tunnel$720 – $1,450
Small fixed skylight (55x55 cm)$1,180 – $2,150
Medium fixed (55x118 cm)$1,950 – $3,650
Medium openable manual (55x118 cm)$2,550 – $4,450
Medium Integra electric / solar (55x118 cm)$3,450 – $5,850
Large fixed (78x118 cm)$2,850 – $5,250
Coupled / oversize (114x118+ cm)$4,850 – $11,000

Add 40-50% over the Colorbond baseline for concrete or terracotta tile. Add 70% for natural slate. Add 20% for other standing-seam metal. Add 30% for flat membrane (low-slope dormer or extension roof) because of the curb-mount detail.

Cost drivers

Unit type and size. The skylight unit is 40-55% of the total on a standard install. Stepping fixed → openable manual adds 35%, fixed → Integra electric adds 95%, fixed → solar Integra adds 70%.

Roof material. Colorbond and Zincalume (Lysaght Custom Orb, Klip-Lok, Trimdek) install fastest with the matched VELUX or Skydome flashing profile. Concrete tile (Monier, Boral) needs careful tile cutting and a tile-profile flashing. Terracotta tile (Bristile Roofing, Boral) is similar but the tiles are more fragile — broken tiles during installation are common and replacement matched tiles cost $4-$18 each.

Retrofit vs new build. Cutting a new opening in an existing roof requires stripping sheets or tiles back 600 mm on all four sides, cutting through the sarking and felt, doubling or sistering the cut rafter, installing trimmer headers, and re-sheeting around the new opening. New build skips all this. New build is 35-45% cheaper installed.

Plaster shaft finish. A skylight in a cathedral or raked ceiling needs no shaft. A skylight in a flat ceiling with roof space above needs a 600-1500 mm shaft, framed, insulated with R3.5 minimum batts, plasterboarded, set and painted. The shaft alone can add $480-$1,250.

240V electrical run. A VELUX Integra electric skylight needs 240V switched live and neutral. If a junction box is nearby (often in the roof space), a licensed electrician can connect in 1 hour. If a new run from the switchboard is required, plan 3-6 hours of licensed electrician time. Solar Integra avoids this — the integrated PV panel and battery drive the motor.

Geographic spread. Sydney and Melbourne metros are 15-25% above the national median. Brisbane and Perth sit close to median. Adelaide, Hobart and Darwin are 5-10% below. Regional and rural premiums of 10-25% are common where the installer travels more than 50 km. Northern WA, NT and far north Queensland carry cyclone-spec premiums (impact-rated glazing required by AS 4040 in TC2/TC3 zones), adding 35-50% to the unit cost.

Australian codes and standards

Skylight installation in Australia is governed by:

  • NCC Volume 2 Part 3.10.1 / J3.4 — energy efficiency for skylights, residential.
  • AS 4040 — Methods of testing sheet roof and wall cladding (wind loading and impact resistance).
  • AS 1288 — Glass in buildings — selection and installation. Mandates safety glazing over baths, beds and pools.
  • AS 1170.2 — Structural design actions — wind actions.
  • AS 4055 — Wind loads for housing.
  • AS/NZS 4859.1 — Materials for thermal insulation (for shaft insulation).
  • WERS (Window Energy Rating Scheme) — voluntary rating scheme for energy performance, referenced by the NCC.
  • Manufacturer flashing requirements — VELUX, Solatube, Skydome and Coolite all require their matched flashing kits, or warranty coverage is voided.

Regional considerations

Tropical north (Climate Zone 1-2) — cyclone-rated glazing required in TC2/TC3, low SHGC required, vented or solar-vented skylights provide useful stack ventilation.

Temperate east coast (Zone 3-5) — standard NCC J3 compliance, double-glazed Low-E is the comfortable baseline.

Cool south (Zone 6-7) — Hobart, Canberra, Melbourne suburbs, Snowy region. Triple-glazed Low-E is the energy-rational spec. Argon-filled units only.

Alpine (Zone 8) — full snow loading considered, U-value 1.8 W/m²K target.

Coastal salt-spray zones — anodised or marine-grade aluminium frames specified, never plain timber-clad. Stainless flashings.

Diagnostic step-by-step (before quoting)

  1. Measure the ceiling location and verify roof space above. A vaulted or raked ceiling under finished rooms above adds significant complexity.
  2. Check the rafter spacing from inside the roof space. Standard 600 or 900 mm centres accommodate most single-rafter MK-size skylights without cutting structural members.
  3. Check the roof pitch. Below 15° most skylights need a curb or low-pitch-rated unit. Below 5° this becomes a low-slope detail.
  4. Note the roof material and age. A 30+ year old terracotta or concrete tile roof within 5 years of replacement is a poor candidate.
  5. Identify ductwork, plumbing and wiring above the ceiling that may interfere with the rough opening.
  6. Identify the local Bushfire Attack Level (BAL) — in BAL-19 and above, the skylight must be rated to AS 3959 with appropriate ember protection. This is an additional spec, not an additional cost line, but a wrong unit cannot be retrofitted.

Avoiding overcharging

The skylight installation market has a small but persistent rogue-trader problem after hail or storm events. Red flags:

  • “Storm damage” claims after routine weather.
  • Pressure to sign before a written, itemised quote.
  • Cash-only or wire-transfer demands.
  • Refusal to provide a licensed contractor number or proof of public liability insurance.
  • Bundling a $2,400 skylight install into a $18,000 full re-roof at the first visit.
  • Substitute flashing kits — never accept a non-manufacturer flashing. Warranty is voided.

Insist on a written estimate that itemises the unit model, size, type, glazing spec, manufacturer flashing kit part number, framing scope, finish scope, DA / certifier responsibility, and tip fee. Get licence and public liability insurance proof before any work begins. Most reputable installers happily provide VELUX 5-Star, Solatube Premier Dealer or HIA-member credentials.

Sources: 2026 hipages cost guides; ARC member-survey averages; BlueScope Steel and Lysaght installer pricing 2026; NCC 2022 Volume 2 Part 3.10.1 and J3.4; AS 4040, AS 1288, AS 1170.2, AS 4055, AS 3959; WERS-rated product database; VELUX Australia, Solatube Australia, Skydome and Coolite 2026 dealer price lists.

Frequently asked questions

How much does a skylight cost installed in Australia in 2026?
Most Australian homeowners pay $1,950 to $4,250 for a single medium fixed skylight on a Colorbond or concrete tile roof in 2026, with a typical job (one 55x118 cm VELUX FS medium openable skylight, argon-filled Low-E double glazing, retrofit cut into a single-storey weatherboard home, DA-exempt under permitted minor works, tip fee and ladder access) landing around $2,420 fully installed. Stepping to an openable manual adds $580-$880, an electric Velux Integra adds $1,250-$1,950 over fixed, and concrete or terracotta tile adds 40-50% to the labour over Colorbond. Source: 2026 hipages cost guide, ARC (Australian Roofing Contractors) member quotes, BlueScope Steel and Lysaght installer pricing 2026, and direct quotes from Solatube Australia, Skydome, Coolite and VELUX-certified installers in Sydney, Melbourne, Brisbane, Perth, Adelaide, Hobart and Darwin.
Do I need a council approval for a skylight in Australia?
In most Australian states a skylight install is exempt development under State Environmental Planning Policy where the unit does not exceed 1 m² in glazed area, does not project more than 150 mm above the roof plane, and is on a roof not visible from a primary road frontage. NSW, Victoria, Queensland, WA, SA and ACT have parallel but slightly different schemes — check your local council exempt-and-complying development controls before ordering. Heritage overlays and conservation areas require formal DA approval. The skylight must still comply with the Building Code of Australia (NCC) Volume 2 Part 3.10.1 (energy efficiency) and AS 4040 (wind loading and impact) regardless of approval pathway. New construction installations are covered by the main BCA approval — no separate skylight approval is needed.
What is the BCA / NCC J3.4 requirement for skylight installations?
NCC 2022 Volume 2 J3.4 sets maximum total skylight area as a function of the lit floor area: 2% in Climate Zone 1-2 (tropical), 4% in Zone 3-5 (temperate), 6% in Zone 6-8 (cool). U-value requirements: in Zone 1-2 a maximum total system U-value of 5.5 W/m²K; in Zone 7-8 a maximum of 3.7 W/m²K. SHGC requirements: in Zone 1 a maximum 0.35; in Zone 8 not regulated for heating-dominated climates. The BCA energy assessor or Building Surveyor verifies compliance at the certification stage. Most VELUX, Solatube and Skydome units carry NATA-tested WERS ratings that satisfy the BCA requirements without further engineering.
What is a Solatube and how does it compare to a traditional skylight?
A Solatube (or sun tunnel, daylight pipe, lightpipe) is a 250-350 mm rigid or flexible reflective tube that pipes daylight from a small dome on the roof down through the roof space into a fixture-style diffuser in the ceiling below. The installed cost is typically 50-60% of a standard fixed skylight ($580-$1,180 vs $1,950+), the rooftop dome is small and discreet, and the system has no glazing seal to fail. The trade-off is no view of the sky and no ventilation — pure daylight delivery only. Solatube and the Australian-made Skydome and Coolite SkySlim are the major brands. For inboard rooms, ensuites, walk-in robes and hallways, a Solatube is almost always the right call. For habitable rooms where you want a view and possibly ventilation, a traditional skylight is the right answer.
Can I DIY a skylight install in Australia?
A Solatube or Coolite SkySlim is a reasonable DIY for a confident homeowner — the kit comes with the flashing flange, reflective tube, and ceiling diffuser. Plan on 6-10 hours and $480-$1,100 in materials for a daylight-only unit. A traditional VELUX or Skydome openable skylight is NOT a DIY job: framing a trimmed opening requires doubling rafters, the manufacturer's flashing kit must be interleaved with tile or Colorbond profile correctly, and the internal plaster shaft requires plasterer-level finish. The failure rate among DIY skylight installations exceeds 30% in the first year (leaks, condensation, void warranty). For NCC compliance the installer self-certifies energy compliance and an electrical contractor must terminate any wiring — DIY installs cannot self-certify under State Building Acts.
Are skylights energy efficient in Australia?
A modern argon-filled Low-E double-glazed skylight is rated to U-value 2.5-3.5 W/m²K with SHGC 0.35-0.55 — significantly better than the single-glazed dome skylights common in 1980s-1990s Australian housing. Low-E triple-glazed (VELUX 70Q, Solatube SkyVault) hit U-value 1.8 and qualify for the highest WERS energy band. The actual cooling-bill effect depends on orientation — south-facing or shaded skylights are net energy-positive in most Australian climate zones; north or west-facing without external shading can be a summer overheating problem. Adding manual or motorised cellular blinds reduces summer solar heat gain by 40-60%.
What is the typical skylight lifespan and warranty in Australia?
VELUX gives a 10-year warranty on the unit and 20 years on the glazing seal. Skydome and Coolite (Australian manufactured) provide a 10-year warranty. Solatube provides 10 years on the unit and 25 years on the spectralight tube. Acrylic dome skylights (the budget Bunnings option) yellow and craze over 12-18 years and should be planned as a periodic replacement. The flashing kit, when matched to the roof material and installed correctly, matches the roof system life (40+ years on Colorbond, 50+ on terracotta tile). The most common premature failure in Australian climates is heat-stress cracking on south-facing acrylic domes after 8-10 years.
How long does skylight installation take?
A single retrofit skylight on an existing Colorbond roof takes 5-8 hours of crew time on the roof plus 4-8 hours of interior work for the plaster shaft and finish — typically completed in one day from the householder's perspective. A concrete tile or terracotta tile roof adds 3-5 hours per unit because of the careful tile cutting and re-bedding needed. Solatubes install in 3-5 hours total. Multiple skylights on the same roof slope share mobilisation and add only 4-6 hours per additional unit. Scaffolding for two-storey access typically adds $280-$520 per visit.

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