What percentage of private residential projects that received low band ratings under the Construction Quality Assessment System (Conquas) over the past six years were small condominiums?

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Small Condominiums Constitute Over 58 Percent of Low-Rated Private Residential Projects

Over the past six years, small condominiums, defined as those with fewer than 50 units, have comprised more than 58 per cent of private residential projects that received low band ratings under Singapore's Construction Quality Assessment System (Conquas). Data analysed from 167 assessed projects revealed that 48 projects fell into the lowest tiers, bands 4 to 6, with 28 of these specifically being boutique developments.
Boutique Developments Dominate Low Conquas Scores

Of the 167 private residential projects evaluated by the Building and Construction Authority (BCA) over the last six years, a significant portion exhibited workmanship issues. Specifically, 48 projects were assigned ratings in bands 4 through 6, which represent the lowest performance tiers. Within this group of underperforming projects, 28 were identified as boutique developments, highlighting a clear trend of smaller-scale condominiums being disproportionately represented among those with low construction quality assessments.
Conquas System Evaluates Workmanship and Defects

The Conquas system serves as a comprehensive evaluation tool for construction quality, assessing workmanship and identifying major defects such as water seepage, cracked tiles, and broken fittings. Beyond project-specific ratings, BCA also assigns band ratings to developers and builders based on their overall performance. For instance, developers achieving a band 1 rating reported fewer than one major defect per 1,000 units after temporary occupation permit (TOP), in stark contrast to band 6 developers who reported approximately 80 defects per 1,000 units.
Factors Contributing to Lower Ratings in Smaller Projects

Industry experts suggest that smaller projects, particularly those relying more heavily on onsite construction methods like formwork and concrete pouring, are inherently more susceptible to variability caused by weather conditions and on-site workmanship. In contrast, larger developments often leverage prefabricated systems manufactured under controlled factory environments, which can lead to more consistent quality. Furthermore, larger projects tend to attract more experienced contractors, contributing to a higher standard of execution. Even when premium materials are used in boutique projects, inadequate installation can still result in a high number of defects and consequently lower Conquas scores.

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What percentage of private residential projects that received low band ratings under the Construction Quality Assessment System (Conquas) over the past six years were small condominiums?

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