NZ Home Upgrade Specialists
Upgrade Your Home.
Leave the Rest to Us.
We replace old timber windows and doors with premium double-glazed aluminium. From consultation to completion, we manage every step.
Our Difference
We don't just install windows.
We upgrade homes.
Most companies drop off windows and disappear. Fenster manages the whole upgrade — measuring, manufacturing, installing, plastering, painting coordination, and cleaning up. You deal with one team, and get one finished home.
- One consultation
- One quote
- One finished project
- One team you can trust
Why Homeowners Choose Fenster
A premium upgrade experience — from start to finish.
One Team
Deal with one company from first visit to final clean-up.
One Consultation
We visit your home, measure, and listen to what you want.
One Quote
Clear, honest pricing — no fine print or nasty surprises.
One Finished Project
We coordinate every stage and hand over a finished home.
Independent Advice
We're not tied to one brand — we recommend what fits your home.
Professional Installation
Experienced installers who take pride in the details.
Respect For Your Home
We treat every home like it's our own. Tidy every day.
Complete Project Management
Interior finishing, plaster repairs, painting — all handled.
Project Spotlight
A 1960s weatherboard, reborn.
Mt Eden, Auckland
The challenge
Draughty timber sashes, condensation, and rotting frames on a much-loved family home.
The solution
Full replacement in premium double-glazed aluminium — plus interior architraves, plaster repairs and paint coordination.
"Fenster handled everything. We moved back into a warmer, quieter, brighter home. Zero stress."
— Sarah & James
What We Do
A complete window & door upgrade service.
Replacement of Timber Windows
Double-Glazed Aluminium Windows
Aluminium Sliding Doors
French & Entrance Doors
Interior Finishing & Architraves
Plaster Repairs & Painting Coordination
Warranty & Peace of Mind
Manufacturer Warranty
Full manufacturer warranty applies to all supplied aluminium joinery systems.
Workmanship Guarantee
We stand behind every installation with our workmanship guarantee.
One point of contact
If anything needs attention, you contact us — we coordinate any warranty work directly.
Ready when you are
Let's upgrade your home.
Book a FREE Home Consultation. We'll visit, measure, discuss options and provide one clear quote — no pressure.