DIY Granny Flat with Steel Subfloor System


Materials Included:


  • 100mm Wall panels
  • Extrusions
  • Mastic and Silicon
  • Rivets

C Section Decking system

  • 100x100x3mm GA Posts
  • C150-12 Joists
  • C150-24 Bearers
  • Bracketry & screws/bolts to suit


*Freestanding design to comply with the latest Building codes of Australia.
**Kits are completely Engineered & Council Compliant. All documents, drawings & paperwork included

***Freight will be quoted at the time of purchase

SKU: N/A Categories: ,


Flooring, windows and doors are not included.
Engineering required and possibly permits. Mr Coolroom Pty Ltd takes no responsibility for installation, engineering or planning requirements; this is the purchaser’s responsibility. We recommend a steel subfloor and frame now available, please contact our team.

Additional information

Size & External Wall Colour

6m x 3m Surfmist, 9m x 3m Surfmist, 12m x 3m Surfmist, 6m x 3m Colour, 9m x 3m Colour, 12m x 3m Colour

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