Retail Unit Size and Internal Corridor Width

Check the guidelines relating to retail unit size and internal corridor width for commercial developments

Last updated 9 June 2026

Retail Unit Size

The average retail unit size shall not be less than 50sqm. Average retail unit size is determined using the following formula:

Formula showing that total net retail floor area divided by number of retail units should equal to or be more than 50 sqm.

Internal Corridor Width

The width requirements for internal corridor are dependent on the number of commercial units it serves, and are detailed in the table below.

Table 1: Internal Corridor Width Requirements

Type of Corridor	Primary Corridor¹ (with expected high footfall)	Secondary Corridor²
Single Loaded (single row of retail units)	Minimum 2.4m	Minimum 2.0m
Double Loaded (retail units on both sides)	Minimum 3.0m	Minimum 2.4m

^{1 Primary corridors are thoroughfares where high foot traffic is expected. These are typically the routes between the main entrances and exits of the development. Each commercial development shall provide at least 1 primary corridor and indicate this on plan.}

^{2 Secondary corridors refer to all other corridors.}

For other types of corridor width requirements, refer to relevant guidelines (e.g. BCA Approved Document and SCDF Fire Code). Where a corridor is required to fulfil other functions (e.g. Accessible Corridor), the minimum corridor width shall take reference from whichever corridor width requirement that is greater.

Note: A wider corridor width may be required for corridors with expected heavy pedestrian traffic.