Windows - Total

Total window replacement

Our Full Replacement Windows give your home a true fresh look. We remove the entire existing window system — including frames, glass, and reveals — right back to the original wall opening. From there, we install a brand-new, custom-made double glazed aluminium window.

The result?

Improved insulation.
Reduced outside noise.
Greater energy efficiency.

A sleek, modern finish that adds real value to your home.
It’s not just a window swap — it’s a full performance and aesthetic upgrade.
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Why us

Double glazed windows

Give your home a modern look with total window replacement. Our high-performance aluminium solutions improve insulation, security, and curb appeal. Designed to last with minimal maintenance.
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Energy efficient
Reduce heat loss and lower energy bills with aluminium frame advanced double glazing.
Modernise your home
Upgrade your home with aluminium frames that are low maintenance and built for durability.
Our work

Before and afters

Find the perfect fit for your home

We offer a range of window replacement options to suit your style, budget, and performance needs. Whether you are modernising an older home or upgrading for better insulation, we have the right solution for you.
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Existing to new aluminium frames
Upgrade your old single pane aluminium windows with modern double glazing that offers better insulation, durability, and a refreshed look.
Timber to aluminium frames
Replace old timber frames with high-performance aluminium for a low-maintenance, weather-resistant solution that won’t warp, rot, or require repainting.
Testimonials

Customer testimonials

“Fabulous in every way! We got quite a few quotes for new windows/doors and the products & quotes varied greatly. In the end we went with Ultimate Design because they offered a top quality product, they were very professional and presented us with a very appealing quote saving us thousands of $$$$.”
Shelley H.
“Thank you Fordy for your service and communication over the past 2 years. We had all our windows and sliding doors replaced with double glaze. I even got my dream black mirrored front door and smart lock. Hubby is still recovering from the cost of that door! Anyway, I will continue recommending your company!”
Deidre L.
“We were very impressed with the design advice for our new conservatory and found it easy to envisage how it would look. Construction was very quick, surprising our friends who commented "it's in already?" The completed project complements the existing layout and looks as if it was installed as part of the house rather than as an addition.”
Garry H.
"Love my new door. Replaced my rotting wooden door with a dodgy lock with a sleek, super low maintenance aluminium set. It was an easy process from quote to installation. Hannah nailed the colours and the builders were a pleasure to have on site. Highly recommend these guys for similar renovation work."
Lesley Isaac
"Ultimate Design & Renovation Ltd did an amazing job! Hannah was fantastic to deal with—professional, friendly, and always helpful. We absolutely love our new doors; the quality and craftsmanship are outstanding. Highly recommend their services!"
George Hammond
Get in touch

Designed for comfort, built for Kiwi living

For all your renovation and double glazing needs, trust Ultimate Design.
Contact usVisit our showroom
Get in touch

Designed for comfort, built for Kiwi living

For all your renovation and double glazing needs, trust Ultimate Design.
Contact usVisit our showroom
Contact us
Designed for comfort,
built for Kiwi living
For all your renovation and double glazing needs, trust Ultimate Design.
Contact us for a quote