About Fenster
NZ's home window & door upgrade specialists.
We help New Zealand homeowners replace old timber joinery with premium double-glazed aluminium — and we manage the whole project so you don't have to.
Our Story
We saw how stressful window replacement had become.
Homeowners were juggling window suppliers, installers, plasterers and painters — chasing communication and picking up the pieces. It wasn't good enough for something as important as your home.
Fenster Home Upgrades was built to fix that. We coordinate every trade, keep you informed at every step, and hand back a home that's warmer, quieter and beautifully finished.
We're proudly New Zealand owned and operated, and specialise in upgrading existing homes rather than fitting out new builds.
What we stand for
Our values
Honest
Straight talk, clear pricing, no pressure.
Premium
Quality products and craftsmanship — every project.
One Team
One point of contact from consultation to completion.
Trusted
We treat every home like it's our own.
Independent Advice
We're not tied to one manufacturer.
We work with leading NZ aluminium joinery systems and recommend what best fits your home's style, budget and performance needs. Prefer a specific brand? We can quote it.
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.