The Quality Grade That Follows Your Developer's Name: How BCA's CONQUAS Bands Read a Track Record

At the May 2023 launch of Singapore's construction-quality banding, 20 property developers and 15 builders sat in the top tier, Band 1, and no firm sat in the bottom tier, Band 6. That single line captures the shift the Building and Construction Authority (BCA) has been driving for a homebuyer: the quality of the hands that built your home is no longer a specialist's number buried in an assessment file. It is a public grade, and it travels with the developer's name into the next launch.

Three years on, the register has grown, and moved. BCA's Quality Housing Portal today lists 175 developers and 112 builders, of which 124 developers and 85 builders currently carry a band, across 170 banded private residential projects. This article sets out what the grade measures, how to read it, and, below, the full register of every banded developer, builder and project as the portal showed it at its 1 July 2026 update.

What CONQUAS actually is

The Construction Quality Assessment System, CONQUAS, was introduced by BCA in 1989 as a standard way to score the workmanship quality of a building project at the point of inspection. It has been a requirement for new buildings on Government Land Sales sites since 1992, and for public-sector projects with contract values above S$5 million since 1998 (BCA, via Home & Decor Singapore). Over three decades it has become the reference benchmark for how well a building was actually put together, as opposed to how it was marketed.

Crucially, CONQUAS assesses build quality, the finish, the installation, the watertightness, not the design, the location, or the price. A high band tells you the developer's projects tend to be built with few major defects. It does not tell you whether a project is good value.

Three components add up to one score

For projects with construction tenders called from 1 July 2023 onwards, the assessment is built from three components (BCA official CONQUAS page):