What Is Plot Ratio, and How Does It Cap What Gets Built?

Plot ratio is the total floor area of a building divided by the area of the plot it stands on. URA sets a ceiling for each site in the Master Plan, so it caps how much a developer can build there.

Think of it as a cake allowance. The plot is the tin, and the plot ratio says how many layers you may stack.

How it works

URA calls the measure gross plot ratio (GPR). It is the gross floor area (GFA) of a building divided by its site area. Both numbers matter.

Here is a made-up example, to show the arithmetic only.

A developer owns a 10,000 sqm plot with a plot ratio of 2.8. The most floor area it may build is 10,000 x 2.8 = 28,000 sqm. The same plot at 3.5 would allow 35,000 sqm.

Floor area allowed = site area x plot ratio. Method: URA, gross plot ratio.

More floor area on the same land means more homes to sell. That is why land with a higher ceiling is worth more to a developer.

What counts as floor area

URA uses a gross floor area system “to work out the bulk and intensity of a development”. GFA includes covered floor space and the half thickness of external walls and facade elements. It leaves out voids.

URA’s page also lists other items that count or are exempt. So the rules for balconies, communal rooms and similar spaces are detailed. Read the page for a specific project (last updated 9 June 2026).

Site area is measured between the survey boundary lines. Land set aside for a drainage or road reserve, to be vested in the State, may be counted in the site area for this calculation. That is according to URA’s commercial guide.

That page covers commercial sites. Check the residential guidelines for a home project.

The Master Plan sets a ceiling, not a promise

The Master Plan shows the permissible land use and density for developments in Singapore. URA reviews it every five years.

The plot ratio in the plan is an upper bound. URA says it may not always be achievable. A ceiling says how high you may go, not that the stairs are built.

The shape of the plot, the slope or ground conditions, building setbacks and height limits can all lower what a developer can build. So can the technical requirements of other agencies.

Why buyers should care

• Neighbours. The plot ratio on nearby sites shows how much bigger a future building next door could be. See our guide to URA land use zoning for how to look up a plot.
• En bloc. An older estate built well below today’s ceiling can hold more floor area after redevelopment. That gap is one reason developers bid for old estates. Our en bloc guide covers the other costs a developer weighs.
• Land supply. The floor area a site can hold limits how many homes it can yield. See how the GLS programme affects supply.
• Space and density. A higher plot ratio on the same land usually means taller or more closely spaced buildings.