Understanding the cost of skylight domes isn’t just about the purchase price — it’s about performance, longevity, and the value it adds to your home. Whether you’re replacing an old acrylic dome or considering a full new unit, this guide breaks down what you need to know.
Average Costs in New Zealand
| Product Type | Typical Price Range (NZD, excl. install) |
| Replacement Dome Only | $180 – $450 |
| Full Skylight Dome Unit | $450 – $1200 |
| Custom Sizes / Complex Roofs | $1200+ |
Note: These figures are indicative only. Final pricing depends on dome size, finish, material (acrylic vs polycarbonate), and installation needs.
Factors That Influence Cost
Size of the Dome
Larger domes require more material and often more complex installation.
Materials
Polycarbonate is generally more expensive than acrylic due to its impact resistance and durability.
Finish
Opal finish domes may cost slightly more due to light-diffusion properties.
Roof Type
Tile, metal, and low-pitch roofs may require customised flashings or labour.
Access & Labour
Multi-storey buildings, angled ceilings, or restricted access areas can increase install costs.
When a Replacement is the Smart Choice
If your existing skylight frame is in good condition, a dome-only replacement is often the most cost-effective option. It restores clarity and performance at a fraction of the cost of a full unit.
Common signs a replacement dome makes sense:
- Cracks or brittleness in the dome
- Discolouration (yellowing, hazing)
Common signs a replacement dome makes sense:
- Water ingress from the top surface, not the flashing
- Dome is over 15–20 years old
When a New Unit is Worth the Investment
Installing a full new skylight dome unit is ideal when:
- The existing frame or flashing is damaged
- You want a bigger or differently shaped dome
- You’re upgrading for better insulation or energy performance
- You’re renovating the entire roof
Bonus: A new unit gives you peace of mind with fully upgraded components.
Long-Term Value & Energy Savings
A well-installed skylight dome reduces the need for electric lighting during the day, lowering energy bills. Opal domes help diffuse heat and harsh glare, improving indoor comfort. Replacing an aging dome can also help prevent hidden water damage that leads to costly repairs later.
Home resale appeal: Natural light is one of the top features homebuyers look for — skylights can add both lifestyle and property value.
Get a Personalised Quote
Need help deciding between replacement and new?
We supply high-quality acrylic and polycarbonate domes in a range of sizes — and we’re happy to talk you through your options.