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Land Survey Services

Allocation of Lot Numbers
Each land parcel in Singapore is uniquely identified by a lot number. This identifier has 2 components, namely the survey districts Mukim (MK) or Town Subdivision (TS) number and the lot number.

For administrative purposes, Singapore is divided into 30 TS and 34 MK. TS are located around the city area whereas MK are found in the rural districts since mukim is the Malay word for rural area. The TS and MK boundaries may be altered by the Chief Surveyor.

SLA issues lot numbers to identify land parcels, more commonly called land lots, within a TS or MK. Meanwhile, strata lot numbers are assigned to units in a building when a building is subdivided.


When are new lot numbers allocated?

New land lot numbers are allocated when:
  1. part of an existing lot is alienated or acquired by the Collector of Land Revenue; or
  2. there is a request, with the relevant approval or authorisation to amalgamate and/or subdivide the land; or
  3. c. new land parcels are formed arising from reclaimed land, allocation of new foreshore lot, airspace lot or subterrenean lot.

For Strata lots, new lot numbers are allocated when there is a request, with the relevant approval, to:
  1. subdivide a building; or
  2. amalgamate and/or subdivide an existing strata lot.



Service Standard
The SLA allocates and releases lot numbers to the applicant within 2 working day from the date of receipt of the application.


The Lot Base System
The Lot Base System (LBS) maintains a complete inventory of all lot numbers in Singapore. It records the history of lot creation, amalgamation and subdivision of all lots in Singapore.


Land Lot
The SLA issues lot numbers to identify land parcels, more commonly called land lots, within a TS or MK. The lot number alone cannot uniquely identify a lot as lots in different TS or MK may have the same lot number. A lot also cannot sit on more than one TS or MK. If a lot created by an amalgamation of parent lots crosses TS or MK boundaries, the SLA will redefine such boundaries so that the new lot is wholly contained within one single TS or MK.

A lot can be subdivided into 2 or more lots, while two or more lots can be amalgamated into 1.

A land lot is the unit of land ownership. It can be owned by one owner or multiple owners as joint tenants or tenants-in-common with undivided portions.

Airspace and subterranean lots are 3-dimensional lots which are designated above and below the ground surface respectively. Airspace lot numbers start with the 70,000 series, and subterranean lot numbers start with the 80,000 series.


Strata Lot
Strata lot numbers are assigned to units in a building when a building is subdivided. They bear the prefix "U" e.g. U12345X.

A strata lot can be further subdivided into 2 or more strata lots, and 2 or more strata units can be amalgamated into 1.

A provisional lot is a strata lot in 2 phased development where the future building shall be subdivided when it is built. Being a strata lot, it also bears the prefix "U".

An accessory lot is a strata lot which is made appurtenant to another strata lot. It bears the prefix "A" e.g. A22X.


Lot Numbering System
The format for the land, strata and accessory lot numbers is designed to provide a simplified and uniform lot numbering system. The lot numbers are allotted uniquely in a running series within each survey district and suffixed with a check alphabet. The check alphabet is computer-generated and serves as a check against misquotes. Please see the table below for a description of the lot number format where N ( ) is numeric and A ( ) is alphabetical:

 Type of lot number
TS or MK
TS or MK number
Prefix
Lot no.
Check Alphabet
Range
  
 Land lot no.
A(2)
N(2)
-
N(5)
A(1)
1-69999 & 90000-99999
 
 Airspace lot no.
A(2)
N(2)
-
N(5)
A(1)
70000-79999
 
 Subterranean lot no.
A(2)
N(2)
-
N(5)
A(1)
80000-89999
 
 Strata lot no.
A(2)
N(2)
U
N(6)
A(1)
U1-U999999
 
 Accessory lot no.
A(2)
N(2)
A
N(4)
A(1)
A1-A9999
 


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