What do Conquas band 1 versus band 6 defect rates show?

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Conquas band 1 versus band 6 defect rates show a large gap in major defects after temporary occupation permits

Conquas band 1 developers had far fewer major defects reported after temporary occupation permit (TOP) than band 6 developers. In units built by a band 1 developer, fewer than 1 in every 1,000 units had major defects reported after TOP, compared with 80 in every 1,000 units for band 6 developers.
Band 1 levels major defects far less often after TOP
The Building and Construction Authority data shows that for band 1 developers, major defects reported after TOP occur at a rate below 0.1% (fewer than 1 per 1,000 units). This indicates substantially better construction workmanship outcomes on the major-defect measure used in the Conquas system.
Band 6 defect rates are much higher after TOP
For band 6 developers, the reported major defects after TOP rise to 80 per 1,000 units, which is 8%. This is a much higher frequency of major defects than the band 1 rate.
The comparison is tied to Conquas major defects after TOP
Conquas evaluates workmanship and major defects such as water seepage, cracked tiles and broken fittings, and BCA also assigns band ratings to developers and builders. BCA inspections and validated homeowner feedback after TOP are part of how project banding is determined, which is why the defect rates are framed around post-TOP reporting.
The gap reflects how Conquas band ratings track construction quality outcomes
The stark difference between fewer than 1 in 1,000 units (band 1) and 80 in 1,000 units (band 6) shows that Conquas band ratings correspond to meaningful variation in major-defect outcomes after TOP. In practical terms, higher band numbers align with more frequent major defects reported after temporary occupation.

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What do Conquas band 1 versus band 6 defect rates show?

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