Contractors Registration System (CRS)

What is CRS

The Contractors Registration System (CRS) registers contractors providing construction and construction-related services for the public sector.

Who is it for

For contractors intending to tender or undertake construction and construction-related public sector projects in Singapore.

Types of Workheads

There are a total of 65 workheads under the following 7 major groups of registration:

Group of registration

Financial Grades

Construction Workhead (CW)

A1, A2, B1, B2, C1, C2, C3

Construction Related Workhead (CR)

L6, L5, L4, L3, L2, L1, Single Grade

Mechanical & Electrical Workheads (ME)

L6, L5, L4, L3, L2, L1

Facilities Management Workhead (FM)

FM01: M1, M2, M3, M4
FM02, FM03 & FM04: L6, L5, L4, L3, L2, L1

Supply Heads (SY)

L6, L5, L4, L3, L2, L1

Trade Heads (TR)

Single Grade

Regulatory Workheads (RW)

Not applicable


Registration requirements

Contractors are required to:

Key requirements


Financial capability


Valid audited accounts, paid-up capital, net worth, etc

Relevant technical personnel

Full-time employed, recognised professional, technical qualification, valid licenses, etc

Management certifications

SAC Accredited ISO9001, ISO14001, OHSAS 18001, etc

Track record

Valid projects with documentation proof, endorsed and assessed by clients

Builder Licence

CW01 (General Building) and CW02 (Civil Engineering) require General Builder Class 1 for Grades A1 to B2


CW01 and CW02 require General Builder Class 1 or Class 2 for Grades C1 to C3


CR08 (Piling Works) require Specialist Builder (Piling Works) for L6 to L1


CR10 (Precast Concrete Works) require Specialist Builder (Pre-Cast Concrete Works) for L6 to L1


CR12 (Ground Support and Stabilisation Works) require Specialist Builder (Ground Support and Stabilisation works) for L6 to L1


CR15 (Site Investigation Works) require Specialist Builder (Site Investigation

work) for Single Grade


Types of applications

How to apply

All types of applications must be submitted through the Electronic Builders Licensing and Contractors Registration Systems (eBACS).

Types of Forms



 Company Information  Approval to Update change of Company's Particulars

 Track Record

 Section D1 for Completed Projects for CW, CR, ME & FM

 Section D2 for Ongoing Project for CW, CR, ME & FM

 Section D(TR) for Trade Heads require two endorsements

 Section E(SY) for Supply Heads

Technical personnel

Approval to Update Declaration of Technical Personnel Appointment and Experience (For CRS only)

Approval to Update Employee's Work Pass (Employment Pass/ S-Pass)
 Resignation of Technical Personnel
Continuing Education & Training (CET)
 Declaration of CET Records
 Personnel Acknowledgement for CET
 Apply for Recognition of CET courses

Popular e-Services


The Construction Workforce Registration System (CWRS) is an online portal for CoreTrade and Multi-skilling registration and the renewal of Direct R1 eligibility.

Online Registration for Verification System

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Online PTO System

Lift and escalator owners, contractors and Authorised Examiners (AEs) can apply for and view applications for Permit to Operate (PTO) here.