Logan · South East Queensland · Granny flat data
Building a granny flat in Underwood: what the council data shows
Not enough decided granny flat applications in Underwood to publish suburb-level rates — so this page shows the honest picture: what we hold for Underwood, and how granny flat applications have fared across Logan. Data current as of 26 July 2026.
Casa Intelligence holds 3 decided granny flat applications for Underwood — too few to publish a suburb-level rate — while across Logan, 90% of 1,339 decided granny flat applications were approved.
3
Decided in Underwood
Too few to publish a suburb-level rate
90%
Logan-wide approval
1,203 of 1,339 decided applications
28 days
Logan median decision
Lodgement to decision (n=1,324)
3 Mar 2023
Latest local decision
Most recent decided granny flat application in Underwood
Why we don’t publish a Underwood approval rate
Our records hold 3 decided secondary dwelling (granny flat) applications on Underwood properties. A percentage computed from a sample that small would look authoritative and mean almost nothing, so we don’t publish one. That is not a gap in council data — it usually reflects that many compliant granny flats proceed without a development application (building approval only), so few ever appear in DA records.
Across Logan as a whole the sample is meaningful: 90% of 1,339 decided secondary dwelling (granny flat) applications were approved, with a median decision time of 28 days. These are real, decided applications assessed by the Logan council, not estimates or modelling.
Whether a granny flat works on a specific Underwood block comes down to the zone, precinct and overlays for that address — lot size, flood and character mapping decide more than suburb averages ever will.
About this data
These figures summarise decided development applications recorded against Underwood properties and Logan council records, current as of 26 July 2026. Past decisions describe how comparable proposals have fared — they do not guarantee, and cannot predict, the outcome of any future application. This page is general information, not planning or legal advice: what is achievable on a specific site depends on its zoning, overlays, lot dimensions and assessment pathway.
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