Does SSD apply to office units?

A. Building Units (Including Those Under Construction) With Permitted Industrial Uses As Shown In Table 1
Table 1: Permitted Industrial Uses1
1. Light Industrial Building 10. Wholesale Centre
2. General Industrial Building 11. E-business
3. Special Industrial Building 12. Media Activities
4. Warehouse 13. Call Centre
5. Business Park 14. Laboratory
6. Science Park 15. Showroom
7. Food Catering 16. Motor Vehicle Showroom
8. Industrial Training 17. Any other factory including food factory
9. Laundry 18. Any other use of an industrial nature
1 Permitted use means :-

A use permitted by a Written Permission given under section 14(4) of Planning Act other than that given for a period of 10 years or less i.e.exclude temporary permission granted by the Competent Authorities for change of use
A use authorised by a notification under section 21(6) of Planning Act; or
Such use, being an existing use of the building or part thereof and not being the subject of a written permission given under section 14 of the Planning Act or a notification under section 21(6) of that Act, was a use to which the building or part thereof was put on 1st February 1960, and the building or part thereof has not been put to any other use since that date
To find out the permitted use of a property, you can:

Approach the developer or the property owner for the latest Written Permission (WP) and the plans approved under the WP; or
Check the approved use via URA's Electronic Development Register (free). This is an electronic repository for information on all Written Permissions granted or rejected by URA from 1995; or
Submit an Enquiry on Approved Use of Premises at URA e-Services portal. There is a search fee of $50 per property unit in a building; or
Apply to URA for a Requisition for Planning Records (using Form DC15). There is a search fee of $100 per record and a document fee of $25 for each copy of approved plan.