Apply for House and Unit Numbers

Properties have to be numbered for identification purposes. The allotted number in combination with the name of the street at which it is located, forms a unique address.

Power to Allot and Alter Numbers

Under Section 51 of the Property Tax Act, the Comptroller of Property Tax is given the authority to allot and alter the House or Unit Number of any property. The use of an unauthorised House or Unit Number is an offence under the Property Tax Act. 

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

 

Guidelines for House and Unit Number

Houses and buildings are numbered for identification purposes. The house number or unit number allotted is guided by the general principles of horizontal numbering and vertical numbering systems.

1) House Number (Horizontal Numbering)

This refers to the unique number assigned to a building or development along a road. 

a. Odd and Even Numbers

The numbering of buildings is in ascending order, with odd numbers on the left side of the road and even numbers on the right side. The direction of the road from which the numbers take reference is pre-determined by the Comptroller. 

b. Order and Sequence

The numbers will be in sequential order and omission of any numbers is not allowed. For example, the numbers 4, 13, 14, etc., which can be perceived as undesirable or inauspicious, will not be omitted. In situations where there are insufficient numeric numbers, alphabetical suffixes starting from A, B, C, etc. may be assigned to the numbers. The alphabets “I” and “O” are not allowed to avoid confusion. 

c. Frontage/ Main Entrance

As a general rule, developments will be allotted a house number in sequence to those along the street where the main entrance is located. For developments with vehicular access located on a minor road (due to planning or road requirements), the Comptroller may allot house numbers along the main road if the development has a main entrance along the main road. 

d. Reservation of Numbers

The Comptroller can reserve numbers for adjoining sites which can potentially be subdivided into smaller plots.

2) Unit Number (Vertical Numbering)

This refers to the number assigned to a unit within a building, where applicable. The unit number is preceded by '#' e.g. #12-456. The first two digits refer to the floor level the unit is located on, while the numbers after the hyphen sign refer to the allotted number for the particular unit. 

a. Numbering of Floors

The numbers '01' is normally assigned to the first level of a building where the main entrance is located, followed by '02' for the second level and so on. Basements are assigned "B1', 'B2' and so on downwards. Omission of any numbers is not allowed. 

b. Mezzanine Floors

A mezzanine floor with access from internal stairs within a unit on a particular floor will be considered as part of that same floor. A mezzanine floor with an external access will be considered as a separate floor. 

c. Unit Numbers

Units are generally numbered sequentially in a clock-wise direction starting from "01". A unit number will be provided for each distinct unit shown on the floor plan. Omission and reservation of any numbers is not allowed for a residential development. However, for very large commercial units, unit numbers may be reserved for possible future subdivision. Alphabetical suffixes starting from A, B, C (with the exception of “I” and “O”), etc. will be assigned where necessary. 

Applying for New House / Unit Number

This is applicable for new properties or existing properties with approved changes to the building layout.   

For example, house and unit number required for new building, change of house number affecting existing unit number and addition of unit created from common property.     

To apply for house / unit numbers within the property:

  1. Ensure that the proposed building plan is approved by the relevant authorities. You may submit the application after Urban Redevelopment Authority (URA) has granted the Provisional Permission or Planning Clearance for the development.
  2. Download the form Application for House Number and Unit Number (PDF, 617KB).
  3. Prepare the following supporting documents in PDF format and complete the application form.
    • A copy of approval on proposed building plans
    • A set of site and location plan
    • Complete set of approved floor plan with clear demarcation of the boundary line and proposed numbers
  4. Submit the completed application form with the supporting documents to pvs-hn@iras.gov.sg. The application form and supporting documents should not exceed 7 MB in total. Alternatively, you can mail the documents to:

    The Comptroller of Property Tax
    House Numbering Unit
    Inland Revenue Authority of Singapore
    55 Newton Road
    Singapore 307987

House numbers and unit numbers will be allotted after Written Permission/Planning Clearance has been granted by URA.

Generally, it 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. 

Applying for Change of Unit Number

This is applicable when there is a change in the configuration of units within a building due to subdivision or amalgamation of existing units.

For example, if a shop unit #01-02 is subdivided into two, the two units have to be renumbered as #01-02 and #01-02A or #01-03.

To apply for change of unit number within a building:

  1. Ensure that the proposed change is approved by the relevant authorities, where applicable.
    1. Download the form Application for Change of Unit Number (PDF, 1.1MB).
    2. Prepare the supporting documents in pdf format and complete the application form.
      • A set of existing floor plan annotated with the original unit numbers allotted by IRAS
      • A set of approved floor plan with clear demarcation of the boundary line and annotated with proposed numbers

    3. Submit the completed application form with the supporting documents to pvs-hn@iras.gov.sg. The application form and supporting documents should not exceed 7 MB in total. Alternatively, you can mail the documents to:

      The Comptroller of Property Tax
      House Numbering Unit
      Inland Revenue Authority of Singapore
      55 Newton Road
      Singapore 307987

    Generally, it takes 4 weeks to process the application upon receipt of complete information.

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

    Display of House and Unit Numbers

    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 in the following manner as provided for in the subsidiary legislation of the Property Tax Act:

    1. In the case of a unit in a building - on the outside surface of the front door, or immediately adjacent to it, or in such other position as to be clearly visible from the entrance lobby or corridor on the same floor.
    2. In the case of a house, building or other property - on the outside surface of the front door or front wall of such house or building or at the entrance of the enclosure of the property in such a position as to be clearly visible from the road in which the property is situated.
    3. The numerals or lettering used shall be -
      1. of such colour as to contrast with the background against which they are marked or displayed;
      2. of sufficient size as to render them clearly discernible from a distance of 10 metres; and
      3. of durable, non-absorbent material, which expression shall be deemed to include paint.
    4. Where a number is to be marked or displayed on the outside surface of the front wall of a building, it shall be between 1.5 metres and six metres above the level of the ground. In all other cases it shall be between one metre and 2.5 metres above the level of the ground.
    5. Only Arabic numerals and Roman letters of the alphabet shall be used. Please refer to Property Tax (Property Numbers) regulations (PDF, 64.9KB) on the subsidiary legislation on display of house and unit numbers.

    Contact Information

    If you have any further enquiries, please call us on +65 6351 2442, +65 6351 2461 or +65 6351 2413, or email us .

    • Why do I need to apply for a house / unit number?

      Properties have to be numbered for identification purposes. This is to ensure that each property is allotted with a unique address and there is no duplication of address that is already in existence.

    • Who can submit the application?

      Owner or developer of the property can submit the application. The owner may appoint a representative, usually a Qualified Person or the tenant, to submit the application on his behalf.

    • When can I submit the application?

      House/unit number application should preferably be submitted to IRAS immediately after the development application to the Grant of Written Permission is submitted to URA. Generally, it takes about 4 weeks to process your application upon receipt of complete information.

    • Is there a processing fee for the application?

      There is currently no processing fee to be paid.

    • When can I use the house/unit number?

      Upon the issuance of the Certificate of Numbering, the address allotted can be used.

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

      The owner or developer is required to inform IRAS 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 becomes invalid and should therefore be withdrawn. To notify IRAS on the withdrawal of number, email us at pvs-hn@iras.gov.sg.