Hey guys just had a look at title don't now why I thought 860 block it's 845 sorry for that
Ok then I doubt you'd get permission to squeeze in that 4th villas as I'd hoped.
Back to triplex then
If you want to stretch the envelope a little then...... you could put in a triplex PLUS a single person dwelling (not a granny flat but similar). A single person dwelling lot size is allowed to be 50% of a normal lot, so for R40 this would be 110 sqm (half of 220sqm).
845 minus 110 still leaves 745sqm which is enough for 3bed/2bath/double garage villas.
It's an out there concept but could be a little opportunity to increase yield and profit.