Launch of New One-Stop Portal for House and Unit Number and Street and Building Name Applications

The Inland Revenue Authority of Singapore (IRAS) and Street and Building Names Board (SBNB) are pleased to announce the launch of the Property Name and Address digital service on 26 Apr 2023. This new digital service aims to provide greater convenience for users to apply for house and unit number and street and building names on the same platform. You may read the announcement here

Role to Allot and Alter House and Unit Numbers

The Inland Revenue Authority of Singapore (IRAS) is given the authority to allot and alter the house and unit number of any property under the Property Tax Act. 

Houses and buildings are numbered for identification purposes. It is important that property developers, owners or their appointed representatives apply to IRAS for unique property address to be authorised for use and display every house and unit number at a conspicuous location. The use of an unauthorised number is an offence under the Property Tax Act.

The allotted number in combination with the name of the street where it is located, forms a unique address.

A house address comprises
[House Number] [Street Name] [# Unit Number, if any] Singapore [Postal Code]

House and Unit Numbering Guidelines

House and unit number should provide clear location or direction cues to the public so that they can be easily identified and located by emergency personnel, delivery services and the public in a quick and efficient way. 

A good house/unit number is one that:
  • Is appropriate and relates to the street where the main entrance/frontage is located
  • Is sequential to the planning of numbers for the building and street
  • Avoids confusion with another building or unit in another part of Singapore

We encourage applicants to read through the house and unit number guidelines in the handbook below. It explains the importance of house and unit number, and the considerations by IRAS when approving house and/or unit number applications

Apply House and/or Unit Number 

Property developers, owners or their appointed representatives may submit an application through Property Name and Address Digital Service at Please ensure that you have the necessary information/documents before making an application. Generally, IRAS takes 4 weeks to process the application upon receipt of complete information.

A Certificate of Numbering (CON) indicating the list of allotted numbers will be issued by IRAS to the applicant.