COMMENT | Our second article, "Population data mismatch undermines PJ transport master plan", examined whether the numbers underpinning PIPPJ 2.0 can be relied upon. This article examines a 2023 change to the way building size is calculated for planning purposes in Selangor.

The Draft Petaling Jaya Local Plan (RTPJ) 2035 (Replacement) identifies areas around MRT, LRT and KTM stations for higher-density development.

Together, these areas cover 45.5 percent of the Draft RTPJ (Replacement) planning area. The higher plot ratios applying to these areas are 1:6 and 1:8.

Imagine the same piece of land. Before 2023:

Same land

Same plot ratio: 1:4

Smaller building

From 2023: