Check again ur final unit layout with Approved Building Plan. Developer should handover a copy to JMB/Management Office.

In your case, those column is within ur parcel, normally u cannot calculate those area and seek for compensation.

Based on the provided layout, ur SPA area should be 5m x 8.8m = 44m2.

Standard Schedule H should only allow 2% threshold, not sure why ur SPA is 5%.

if 5% = 44m2 x 5% = 2.2m2.

So if ur strata title showing that ur parcel area is less than 41.8, then u can claim the different.

Please remember, always use m2 instead of sq.ft. This is because when strata title is out, all stated in m2.

some conversion may cause u gain/loss.

Please take note.