Double glazing in Wellington
Wellington's per-window retrofit prices are the best published in New Zealand, so a Wellington estimate on this site is the closest to a real quote before anyone visits. Wind zone is the local variable that can move it.
A typical whole-house double glazing job in Wellington costs about $17,000 (CheckMyBuilder, checked 15 Sept 2026). Per window, published New Zealand rates run $550–850 for an aluminium retrofit, $800–1,200 for timber, and $1,500–2,500+ per opening for full replacement.
What we know about Wellington
- Wellington Glass publishes the clearest per-window retrofit figures in the country: $550–850 for an aluminium window and $800–1,200 for a timber one, with full replacement from $1,500–2,500+ per opening. (Wellington Glass)
- Wellington Glass notes that high-wind zones may require thicker glass, which changes the unit spec and the price. The measure is where that gets settled. (Wellington Glass)
Rates that apply here
| Rate | Range | Source |
|---|---|---|
| Retrofit into your existing frames | $450–$800 per m² of glass | CheckMyBuilder |
| Full window replacement (new joinery and glass) | $800–$1,600 per m² of glass | CheckMyBuilder |
| Aluminium window, retrofit | $550–$850 per window | Wellington Glass |
| Timber window, retrofit | $800–$1,200 per window | Wellington Glass |
| Full replacement, per opening | $1,500–$2,500 per opening | Wellington Glass |
Why Wellington is a waitlist today
We build supply before sales. Until a retrofit glazier in Wellington has signed a subcontract with us, given us their public liability certificate and put their sealed-unit warranty terms in writing, we will not take your money for a measure we cannot deliver. Join the waitlist and we will email you the day it opens. The calculator works fully in the meantime, because it only shows published market rates.
What the measure checks
- Whether your frames will take a thicker sealed unit at all.
- Frame condition: rot, corrosion, movement, failed seals.
- Hardware that has to carry the extra weight.
- Anything that takes the job outside the consent exemption.
- Exact glass sizes, which is what makes the quote fixed.
What we won't say about your region
We publish no climate-zone claims, no suburb lists and no local installer rankings for Wellington. Where we have a published local figure, it is above with its source. Where we do not, we have left it out rather than filled the space.
Double glazing in Wellington: questions
How much does double glazing cost in Wellington?
CheckMyBuilder puts a typical whole-house job in Wellington at $17,000 (checked 15 Sep 2026), against a national typical of $16,000 and a range of $10,000–25,000. Per window, Wellington Glass publishes $550–850 for an aluminium retrofit and $800–1,200 for timber.
Can you do a measure in Wellington now?
Not yet. We have not signed a subcontract with a retrofit glazier in Wellington, and we will not sell a measure we cannot deliver. Join the waitlist and we will email you the day it opens; nothing is charged.
Is retrofit or replacement better for my house?
Retrofit if the joinery is sound and budget matters: $450–800 per m² of glass against $800–1,600 for replacement (CheckMyBuilder). Replacement if the frames have failed or you want thermally broken joinery. The full comparison.
Do I need a building consent?
Usually not in an existing dwelling of up to two storeys, under Schedule 1 Exemption 8, provided the window being replaced hasn't failed its 15-year durability requirement. Your council is the final word. The conditions.
Which suburbs of Wellington do you cover?
The whole of Wellington, once measures are open here. We do not publish suburb lists, because a page of suburb names tells you nothing about whether we can actually get to you.