Two condos can list the same square footage and the same price per square foot, and one of them is a much better home than the other. The difference is usually not the developer's taste. It's the year the project was approved, and which URA rules were in force when the architect drew it. Over roughly fifteen years, the Urban Redevelopment Authority rewrote what counts as floor area in a Singapore condo, and each change fed straight into the layouts, unit sizes and prices on sale today.
This is the long version: every circular that matters, in order, with the reason URA gave for it, what it did to the floor plan, and what it means when you compare two units. Keep one fact in your pocket as you read — the rule that drew a unit is the rule in force when the development's plans were approved, not when it was sold or when you're buying it. A 2008-approved project that only launched in 2011 was drawn under the old rules.
Sources: URA development-control circulars (cited by number in each section below) and the joint URA/SLA/BCA/SCDF floor-area harmonisation circular. As at June 2026.
Why floor area is the whole game
A condo developer buys land with a fixed budget of Gross Floor Area (GFA) — the plot ratio times the site area sets a hard ceiling on how much floor the project can have. Every square metre of GFA is paid for in the land price. So the developer's standing incentive is to find space they can sell to you that doesn't count against their GFA budget: space that is free to them but billed to you at full price per square foot.
