At Custom Windows, we supply builders and trade customers across Western Australia with high‑quality aluminium windows and aluminium doors for granny flats, delivered as complete knock‑down (CKD) kits for quick and efficient installation. If you’re working on a single backyard unit or a larger multi‑dwelling project, our flatpack kits are designed to make your job more efficient, convenient, and cost‑effective.

With over 40 years of manufacturing experience, we understand the demands of the WA building industry. Our wholesale supply model means you get the right products at competitive trade rates.

Why Choose CKD Kits for Granny Flats?

CKD (complete knock‑down) kits are supplied flat-packed, so they can be delivered anywhere in WA with minimal transport risk and cost. Each kit is manufactured to your specifications, packaged for easy handling, and comes with everything needed for assembly.

There are a number of reasons to use CKD Kits, including:

  • Cost‑efficient freight: Flatpacks take up less space and reduce shipping costs, especially for regional deliveries.
  • Reduced handling damage: Components are packaged to protect frames and finishes in transit.
  • On‑site flexibility: Store flatpacks securely until you’re ready to install, helping manage space on smaller sites.
  • Trade‑friendly assembly: Kits are designed for straightforward on‑site construction using standard tools. These aren’t bound by location, regional areas can also be delivered to.

Kitform Products PDF

 

Supply With or Without Glazing

We supply CKD granny flat window kits and door kits in two different configurations to match the specific needs of your project.

Our range of kits includes:

Kits Supplied Without Glass

  • Ideal for builders who prefer to source glazing locally or use their own glaziers.
  • Reduces weight for easier handling on-site.
  • Particularly suited to remote or regional deliveries where glass transport may be challenging.

Kits Supplied With Glass

  • Delivered complete with glazing installed, ready to assemble.
  • Manufactured to meet strict quality standards for energy efficiency, safety, and performance.
  • Options for single or double glazing to meet compliance requirements.

Whichever option you choose, all frames are precision‑manufactured from high‑quality aluminium for strength, low maintenance, and durability in WA’s climate.

Designed for WA Conditions and Compliance

Every CKD kit we produce is built to perform in Western Australia’s diverse environments. Our Carinya windows and doors are certified under the Window Energy Rating Scheme (WERS) and meet the standards of AS2047. These ratings show how effectively our products keep heat out in summer and retain warmth in winter, helping maintain a more stable and comfortable indoor temperature.

By improving insulation and reducing reliance on heating and cooling, Carinya products support lower energy usage and ongoing cost savings. It’s a practical, energy-efficient choice for your granny flat and a better outcome for the environment.

By choosing Custom Windows, you can be confident your granny flat windows and doors will meet local council and regulatory requirements, while delivering the look and performance your clients expect.

WA‑Wide Delivery

Our wholesale CKD kits are available for delivery anywhere in Western Australia, from metro Perth to the most remote regional sites.

Delivery benefits:

  • Efficient freight packaging to minimise space and cost
  • Coordinated dispatch to match your build schedule
  • Protective wrapping to safeguard against dust, moisture, and handling damage
  • Trade‑friendly labelling and instructions to streamline on‑site assembly

We regularly supply CKD kits to builders working on regional and FIFO projects, making us a trusted partner for granny flat developments across the state.

 

Partnering With Builders and Trade Clients

Our wholesale supply model is built around the needs of WA builders and trade professionals. We offer:

  • Competitive trade pricing
  • Custom manufacturing to your specifications
  • Reliable lead times to keep your projects moving
  • Expert advice on glazing and frame configuration
  • A convenient and efficient point of contact for quotes, orders, and technical queries

Looking for a Quote or Partnership?

If you’re looking for a reliable wholesale supplier of granny flat windows and doors in WA, Custom Windows is ready to help. Our CKD flatpack kits give you the flexibility, cost savings, and the quality you need to deliver on time and on budget, with the added confidence of local manufacturing and decades of industry experience.

Get a Quick Quote today on (08) 9279 7444, email sales@customscreens.com.au, or submit an online enquiry to discuss your project requirements. We look forward to working with you.