Few questions about subdivision

i was just curious to know if there was any information available on the net to find out what suburbs in WA are zoned as?
Like i found out the traditional way for some suburbs by ringing/emailing the local councils.. but was just wondering if theres anything published that displays current zones and/or future proposed zone changes?

Also,

I have been looking at a place in Perth to buy / subdivide / build / sell. Its a potential Triplex block and it comes with plans for 3 '3×2' townhouses to be built on it using a common driveway.

I was going to buy the block (it has a run down little old cottage on it) as my PPOR because i was thinking if i live in it, and any capital i create from subdividing and building on it in say a years time wont be taxed.. am i correct?

The idea is to keep it for a year or so, claim the FHOG, save money for the subdivision costs, set up a couple of investors to help fund the project with good returns, sell 2 of the townhouses returning investors money and keep 1 townhouse for myself and hopefully gain $200-$300k equity from the project, thus creating a positive geared property.

Now all this is just a draft on paper, but if someone here has knowledge and experience with subdividing and building and doesn't mind having a chat or sending back and forth a few emails could you please reply to this thread!

I just really would like to clear a few things up on building costs and everything associated, subdivision issues and tax implications.

Any help would be greatly appreciated!

Jeremy.