*Percentile Ranking - Developer/Contractor may be subjected to higher sampling under the 3-Tier CONQUAS scheme for their future private housing projects, as long as they have private housing projects with CONQUAS score below the bottom 10th percentile in the immediate past 3 years.

Year Project Developer Project Developer Contractor CONQUAS Score Percentile Rank 2019 Private Housing AverageQM Rating
2017 Riversails Allgreen Properties Ltd Allgreen Properties Ltd Tiong Aik Construction Pte Ltd 95.9 98% 91.5 Excellent
2017 The Skywoods Bukit Timah Green Development Pte Ltd Bukit Timah Green Development Pte Ltd Tiong Aik Construction Pte Ltd 95.7 93%