Skip to main content
A Singapore Government Agency Website How to identify
Official website links end with .gov.sg
Government agencies communicate via .gov.sg websites (e.g. go.gov.sg/open). Trusted websites
Secure websites use HTTPS
Look for a lock () or https:// as an added precaution. Share sensitive information only on official, secure websites.
Property Name and Address

House and Unit Number FAQs

Get answers to common questions about house and unit numbers, including guidelines and submission requirements.

Last updated 16 June 2026

House and Unit Number

What do I have to prepare before submitting an application?

  • Ensure the street name is approved by Street and Building Names Board (SBNB) 

  • Read the house and/or unit numbers handbook    

  • Ensure you have all the required documents ready for the application 

How will I be notified of the allotted address?

The applicant will be notified with an email notification when the house and/or unit number application is approved. Applicant has to login and download the Certificate of Numbering (CON) within 30 days of email notification.

When can I use the house/unit number?

Upon the issuance of the Certificate of Numbering (CON), the property address can be used.

Do I need to inform IRAS when a house/unit number is no longer required?

The property developer or owner is required to submit an application on the withdrawal of number when a house/unit number is no longer required. In situations when a building has been demolished, the house number as well as unit number(s), if any, become invalid and should therefore be withdrawn.

Do I need to display the allotted address?

The property owner is required to display the house/unit number at a conspicuous place. Failure to display the assigned number or displaying an unassigned number is an offence under the Property Tax Act.


The number shall be marked or displayed as provided for in the Property Tax (Property Numbers) Regulations of the Property Tax Act. You may also reference the display guidelines in the House and/or Unit Number Handbook.

How do I apply using the House and/or Unit Number Application e-Service?

You may refer to the User Guide on How to Apply or Withdraw House and Unit Number.

How do I retrieve the Certificate of Numbering (CON)?

The applicant has to login through our e-Service to download the CON within 30 days from the day the application is approved.

In the event that you require a copy of CON issued previously, the property owner has to submit a search request with the property details. The search fee of $20 per property is applicable.