Subdivision Newbie Questions

Green title? What does it mean? How do you know if its green title?

So am i right in assuming that the property must have been R30 if one of the lots is 286 sqm (not battleaxe).

Nope. The R-Codes allow for a 5% variation that can be applied for and may or may not be supported.

Ie 300x .05 is 15m2. So could be 285sqm.