Lets put it this way.
The housing development is governed by the Housing Development Act.
Why SOHO exist.
Reason is simple. Take for example a residential and commercial titled development.
Residential title - Build whatever house on it be it landed or condo, the developer is obligated to go through the HDA and application of APDL.
Commercial title - Build whatever commercial components on it, and the developer do not need to apply for Developers License and Advertising Permit and the avoidance of HDA. But, some service apartments are built on a commercial platform, thus in this condition, the developer has to comply to HDA (for service apartments only) and application of APDL.
However, SOHO concept or Business Suite concept is different. In other words, it is meant to be a service apartment, but marketed as an office unit which does not require the intervention of HDA and APDL; and that ease off the Developer a whole lot of headaches with HDA. Thus, came this concept.
The developer basically market it as office suites / SOHO, and when signing SPA, the Developer will want you to to sign a separate Renovation Letter. Why? Because Developer will undertake the renovation to complete it as a renovated residential unit.
So, its your call now, whether you want to treat it as office or home or both.