Quick Answer
Skylight installation in Melbourne costs $800–$2,500 for a fixed skylight, $1,500–$4,500 for a ventilating (opening) skylight, and $600–$1,800 for a sun tunnel (all supply and install). Roofing type significantly affects cost — tile roof installations cost more than metal roofs due to flashing complexity. Budget an extra $300–$800 for ceiling and plasterboard work below.
A skylight transforms a dark Melbourne hallway, bathroom, or living room with natural light — and in Melbourne’s moderate climate, an opening skylight also provides excellent natural ventilation. The cost range is wide, so this guide breaks down exactly what drives the price.
Skylight Cost Breakdown
| Type | Supply & Install Cost | Notes |
|---|---|---|
| Fixed skylight (standard, 600×600mm) | $800–$1,800 | No moving parts; Velux, Fakro, or Solatube |
| Fixed skylight (large, 900×1200mm+) | $1,500–$2,800 | Higher material cost and more complex flashing |
| Ventilating skylight (manual) | $1,500–$3,000 | Opens for airflow; hand-operated or pole |
| Ventilating skylight (electric/solar) | $2,500–$4,500 | Remote or rain-sensor auto-close; popular choice |
| Sun tunnel (tubular skylight, 250mm) | $600–$1,200 | For small spaces and long roof-to-ceiling runs |
| Sun tunnel (tubular skylight, 350mm+) | $1,000–$1,800 | More light output; Solatube DS19 or DS22 popular |
| Flat-roof skylight | $1,500–$4,000 | Requires different flashing to pitched roof |
Additional Cost Items
| Item | Cost | Notes |
|---|---|---|
| Roof flashing (tile roof) | $300–$600 | Often included; tile roofs need custom lead or aluminium flashing |
| Roof flashing (metal/Colorbond roof) | $150–$350 | Simpler installation than tile |
| Ceiling plasterboard work | $300–$800 | Creating the light shaft below the skylight |
| Insulation around light shaft | $150–$300 | Required for energy efficiency |
| Electrical (for motorised skylights) | $200–$500 | By licensed electrician; solar models avoid this |
| Blinds or shading | $200–$600 | Optional; Velux makes skylight-specific blinds |
What Affects Skylight Cost in Melbourne?
1. Roof Type
Tile roofs (the most common in SE Melbourne suburbs like Cranbourne, Pakenham, and Officer) require custom step flashing around the skylight frame. This is more labour-intensive than flashing a metal or Colorbond roof and adds $150–$300 to the installation cost.
2. Roof Pitch
Skylights have minimum pitch requirements. Most standard flat-glass skylights require a minimum 15° pitch. Below this, you’ll need a flat-roof or low-pitch skylight model (higher cost). Very steep pitches (over 60°) also add cost due to scaffold requirements.
3. Ceiling-to-Roof Distance (Light Shaft Length)
A light shaft must be built between the roof and the ceiling below. A 300mm shaft is simple; a 2m shaft through a ceiling cavity is complex and expensive. Sun tunnels use flexible tubing to navigate longer runs, making them ideal for difficult ceiling voids.
4. Glazing Type
Standard clear glass maximises light but also transfers heat. In Melbourne, double-glazed laminated glass is the preferred choice — it reduces summer heat gain and winter heat loss. Tinted or frosted glass adds privacy (good for bathrooms) at a modest premium.
Building Permit Requirements
Skylight installation in a standard residential home in Victoria does not typically require a building permit if it involves no structural changes to the roof framing. However, if roof rafters need cutting or any structural alteration is made, a permit may be required. Always confirm with your roofing contractor — a reputable installer will advise you.
Top 10 Tips and Gotchas
- Choose north-facing placement if possible. North-facing skylights capture the most winter sun in Melbourne (southern hemisphere). East-facing gives gentle morning light; west-facing creates afternoon glare and heat in summer.
- Double glazing is worth the extra cost. A single-glazed skylight in Melbourne’s climate can cause significant heat gain in summer and condensation in winter. Double-glazed laminated glass pays for itself in comfort and energy savings within a few years.
- Sun tunnels for tricky spaces. If you have a long or obstructed ceiling void (common in double-storey Melbourne homes), a tubular sun tunnel (Solatube, Velux Sun Tunnel) can navigate corners that a straight skylight shaft cannot.
- Check your roof warranty. Some roofing product warranties are voided by penetrations. Check your roof manufacturer’s guidelines before cutting — particularly for Colorbond and metal roofing.
- Motorised skylights with rain sensors are worth it in Melbourne. Melbourne’s weather changes rapidly. A rain-sensor auto-close feature prevents leaving your skylight open during a sudden storm.
- Insulate the light shaft properly. An uninsulated ceiling shaft is a major heat gain/loss pathway. Always insulate around the shaft to maintain your home’s thermal envelope.
- Match the ceiling finish below. Plasterboard light shaft work needs to match your existing ceiling — same texture, same paint. Factor in patching and repainting into your budget.
- Tile-roof flashing must be done correctly. Improper tile flashing is the most common cause of skylight leaks in Melbourne. Always use a roofer experienced with skylight flashing, not just a general builder.
- Consider blinds from the start. Skylight-specific internal blinds (available from Velux and others) are far easier to fit at installation time than retrofitting later. Add them to your initial quote.
- Check the Nationwide House Energy Rating (NatHERS) impact. In new builds and major renovations requiring an energy assessment, additional skylights affect the energy star rating. A good energy assessor can advise on positioning and glazing type.
Local Melbourne Resources
- Velux Australia — Find an Installer — locate authorised Velux skylight installers in Melbourne
- Solatube Australia — Find a Dealer — tubular skylight specialists across SE Melbourne
- Victorian Building Authority — Roofing Licence Search — verify your roofer’s VBA licence
- hipages — Melbourne Skylight Installers — compare quotes from local specialists
- Bunnings — Skylights — browse skylight products and sun tunnels
Frequently Asked Questions
How much does a skylight cost installed in Melbourne?
A standard fixed skylight costs $800–$2,500 installed in Melbourne. An opening (ventilating) skylight costs $1,500–$4,500. A sun tunnel is the most affordable at $600–$1,800. Add $300–$800 for ceiling plasterboard work below if required.
Do I need a permit for a skylight in Melbourne?
Generally no — standard skylight installation that doesn’t alter roof structural members doesn’t require a building permit in Victoria. However, if roof rafters need cutting or significant structural changes are made, a permit is required. Your installer should advise based on the specific job.
What is the difference between a skylight and a sun tunnel?
A skylight is a glazed window in the roof — it provides the most light and can open for ventilation. A sun tunnel (tubular skylight) uses a reflective tube to channel diffused daylight into the room below — it’s better for long ceiling voids, tight spaces, or areas where a full shaft isn’t practical. Sun tunnels provide softer, more diffused light than direct skylights.
Can skylights cause leaks in Melbourne?
A poorly installed or poorly flashed skylight can leak — particularly on tile roofs where flashing is complex. This is why using a licensed, experienced skylight installer is critical. Modern skylights from reputable brands like Velux include engineered flashing kits that, when correctly installed, provide reliable weatherproofing for 20+ years.
What size skylight do I need for a Melbourne room?
As a rule of thumb, the skylight should be approximately 10–15% of the floor area of the room to provide adequate natural light without excessive heat gain. For a 3m × 4m room (12 m²), a 600×600mm to 900×900mm skylight is appropriate. In Melbourne’s climate, north-facing placement with double glazing gives the best year-round performance.
