DB Homes Granny Flat Guide

The States of NSW, WA, NT, ACT and TAS all have systems in place for hassle-free approvals and fast-tracked building for a Granny Flat.

Provided a few criteria are met, compliance is a simple process, without the expense or time-consuming council approvals often associated with conventional building projects.

Site Suitability

  • Standard Block Size 450m2 – 900m2
  • Minimum Lot width of 12m
  • The combination of the primary dwelling & secondary dwelling must not be over 50% of the total block size
  • A rear boundary set back of 3m with a minimum of 900mm space from the side of the block boundary.


Other Site Considerations

  • Site drainage must comply with your council storm-water policies.
  • If trees are on the proposed site, they may require permits to be removed. Dwellings will generally be set back by 3m from protected trees.
  • If a Granny Flat wall is within 1.8m of an existing dwelling, the wall must be fire rated.
  • Heritage, Fire and Flood considerations.

In addition to the above, your council may allow you to separate the mailing address and arrange for individual utility bills.

A Granny Flat does not permit the actual subdivision of your property – unless it’s already allowed under a local planning scheme.

To find out more, contact us today to book a free onsite inspection & consultation.

Download Guides

  • The Ultimate Guide
  • The Ultimate Guide

    All you need to know about building a granny flat

  • Download
  • Plans & Designs Catalogue
  • Plans & Designs Catalogue

    A customisable collection of designs & plans

  • Download
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