Skylight installation cost in Sydney, and when a skylight needs approval

Published 23 October 2026

Skylight prices: the skylight itself

Start with the product. VELUX publishes recommended retail prices for every skylight it sells in Australia; each range below runs from its cheapest size to its dearest for that type. A Northern Beaches carpenter that fits skylights publishes a product range of its own.

Skylight and sun tunnel prices, supply only

Checked 22 and 23 October 2026. VELUX’s 2026 Australian price list says “Price list effective 1st August 2026. All prices are supply only and include GST”, and that they’re recommended retail prices. Flashing is listed separately; VELUX says its EDW flashing isn’t suitable for wide-span metal profiles such as Trimdek or Klip-lok. Skilled Carpenters (Wheeler Heights, updated 5 March 2026) gives its range for “The skylight itself”; installation is extra and GST isn’t stated.

By our arithmetic, VELUX’s smallest fixed skylight with its tile or metal flashing comes to $692 ($572 + $120) before installation.

Skylight installation cost in Sydney

We found no Northern Beaches business that publishes an installed skylight price. A Sydney attic builder does, and a tubular skylight maker publishes national ranges. Each is shown with its publisher.

Skylight installation prices in Sydney, supplied and installed

A Sydney attic builder’s cost guide (updated 10 January 2026), checked 22 and 23 October 2026. Per skylight, supplied and installed; GST isn’t stated. It says “Most homeowners adding a quality fixed or manual opening skylight budget $1,500 to $3,000 per skylight”. Its fixed roof window price lists a double-glazed unit, insulated shaft and lining, flashing, plastered internal reveal and a tile or metal roof fit.

Skylight prices from a national manufacturer’s guide

Solatube, a tubular skylight manufacturer (guide updated 12 August 2026), checked 22 and 23 October 2026; GST isn’t stated. Only its fixed skylight figure is stated as installed. It says the others depend “on the product and installation conditions”, and that you should check “whether the price you are looking at is for the product only or for the skylight fully installed”.

What moves the price: the length of the light shaft from roof to ceiling, plastering and painting the reveal, the roof material and profile, a two-storey or steep roof, an opening or electric model, and bush fire ratings. A quote should say which skylight, which flashing kit and who finishes the ceiling.

When does a skylight need council approval in NSW?

Fitting a skylight, roof window or ventilator to a house can be exempt development under NSW’s Codes SEPP, which means no council approval. Subdivision 37 sets the standards, and every one has to be met. This is the version in force from 12 December 2025:

Codes SEPP clause 2.74: standards for an exempt skylight

State Environmental Planning Policy (Exempt and Complying Development Codes) 2008, clause 2.74, in the version in force from 12 December 2025. The 2% counts every skylight, roof window and ventilator on the building together.

By our arithmetic, 2% of a 200 m² roof is 4 m² in total. The clause doesn’t apply to a heritage item or a draft heritage item at all, and exempt work also has to meet the building code and be installed to the manufacturer’s instructions (clause 1.16). Unlike a re-roof, a skylight can be exempt inside a heritage conservation area, as long as it can’t be seen from the road.

If a skylight is too big or too close to a boundary, our reading of the Codes SEPP is that on a house outside a heritage conservation area it may fit the Housing Alterations Code as complying development, approved by council or a private certifier. In a conservation area that code excludes the roof, so a development application is needed. Adding a skylight while the roof is being replaced follows these same rules: the re-roofing clause excludes new openings and points to the skylight entry. More on re-roofing approvals is in our guide to council approval for a new roof, and council’s planning line is 1300 434 434.

Energy limits for roof lights in the building code (NCC 2022, 13.2.4) don’t apply in NSW: the code’s NSW variation says the clause “does not apply in NSW”, which uses BASIX instead.

Skylights on bush fire prone land

On bush fire prone land, an exempt skylight must be sealed against embers (clause 2.74), and new building work follows AS 3959 as amended by NSW’s Planning for Bush Fire Protection. The standard itself is paid, so here’s how one manufacturer summarises it. Solatube’s bushfire checklist, for BAL-LOW to BAL-29, says roof penetrations should be sealed “to prevent gaps greater than 3mm”, and that at BAL-29, roof lights in roofs pitched under 18 degrees need ember guards “with a maximum aperture of 2mm”. It says its notes are “not relevant for BAL-40 / BAL-FZ”.

Ask the installer for the product’s bushfire rating for your property’s BAL. The BAL roofing requirements checker summarises the NSW roof rules at each level.

Who can install a skylight in NSW

NSW Fair Trading’s roof tiling and roof plumbing licences both include “putting in skylights, ventilators and the like” where the work doesn’t involve structural changes to the roof. Its carpentry licence lists skylights too; by our reading, that covers the framing around the opening and the light shaft. A contractor licence is needed for work valued at more than $5,000 in labour and materials, including GST; check it on the Service NSW licence register.

An existing skylight that drips is a different job: see skylight and box gutter leaks.

Common questions