The CONQUAS assessment is divided into six levels, with Level 1 representing the highest quality. The assessment is done mainly through on-site inspection and measurement of all aspects of the building project, covering the building structure, surface finishes, mechanical and electrical equipment and ventilation, and plumbing systems.

The assessment results are expressed in the form of scores, with a maximum score of 100, with higher scores indicating a higher level of quality and compliance with code requirements for construction projects. The assessment results will also provide a detailed report of the quality issues and recommendations for improvement in the project.

Currently, SCB has uploaded the Building Quality Assessment Index grading results for 110 developers, 76 builders, and 350 private residential projects (completed in the past six years, and those under review) to the Quality Housing Portal (QHP) for public access.

In this rating, City Developments Limited (CDL) has been awarded the first ranking, which means that CDL's buildings are of the highest quality. As a leading global real estate group with a proven track record of property development, investment and management over the past 60 years, CDL has a stable and geographically diverse portfolio of residential, office, hotel, serviced apartments, shopping malls and various mixed-use developments.

CDL not only shapes the city's skyline with iconic buildings, but also transforms the built environment in Singapore with its many award-winning green buildings. The Group is committed to environmentally friendly construction and invests in disruptive and innovative technologies to improve resource efficiency and productivity.

CDL has been recognized by leading global sustainability ratings and rankings for sustainability. In addition to being ranked 28th in the Top 100 Most Sustainable Companies in the World for 2023 by Sir Enterprise magazine, CDL has been the most sustainable real estate management and development company in the world for five consecutive years. In addition, CDL has received an A rating from the CDP (Carbon Disclosure Project) and maintains double A ratings in the areas of climate change and water security. CDL's sustainability efforts have also been recognized with a AAA rating from MSCI ESG Research, recognition from Bloomberg's Gender Equality Index (GEI), and the highest rating from Sustainalytics.

These awards and recognitions attest to CDL's excellence in building quality and sustainability, as well as its commitment to the delivery of high quality residential and commercial spaces. As a first-tier rater in the Singapore Building Quality Assessment Index, CDL has set a good example in maintaining building quality and delivering quality building products.

Currently, CDL has 11 projects rated at the highest level in the Building Quality Assessment, including The Brownstone, Whistler Grand and Forest Woods.

The projects under assessment include Amber Park, Piccadilly Grand and other new properties.