Development

this is definitely not a point  you want to stumble on. it could become a mistake that costs you a hell of a lot of money.  you want to know with absolute certainty.

You definitely need to do  your homework with council.  Call the Wyndham City Council and ask to speak to someone in the planning department.  Don't call first thing in the morning, last thing of the day or around lunchtime.  You're unlikely to get the most helpful service from someone if you caught them when they were about to eat lunch.  Be friendly, introduce yourself, and don't try to sound like you know what you are talking about.  It just wastes everyones time and could put you at risk of someone not mentioning important information because they presumed you already knew the information.  Say plain and simple that you are looking at buying a particular piece of land (give them the address) for development purposes, and that you haven't done such a thing before.  Tell them what you fancy building on it and ask if the zoning would permit that, and if there are any other stumbling blocks they foresee in terms of development, and also in terms of subdivision.  At the end of the conversation, thank the person for their time at the end and sometimes they will happily say that if you would like any further help feel free to call them back.

Also find a land surveyor from the Wyndham area (refer http://www.yellowpages.com.au) about the same topic.  They can usually give you some very high level idea about things to be done, timelines, and costings.  Ask them to explain how they could help you through this process – what they handle, and what you'd have to handle.  Again, be super friendly, thankful, and indicate you look forward to speaking to them again when you have your thoughts in order to proceed with a plan.

Remember for big parcels of land, you might have to put in roads, street lights, electricity pits etc etc.

Property development is complex and expensive but not especially difficult as long as you understand the process or engage someone else who does. Here's what you need to do:

Assess the opportunity. Do some homework.
Create a strategy for the development so you're clear about what you wish to achieve and can communicate it to others.
Put together some concepts to further communicate the planning objectives. Discuss these concepts with the stakeholders.
Make application for a TPP/DA, and get your permit.
Get the project comprehensively documented.
Subdivide and/or build.
Sell or rent as set out in the second step (strategy)

That's the short form. Obviously it's a little more complex than that, and lots of small things need to happen in the right order to avoid mistakes that can sometimes be costly.

1. Find a project manager or educate yourself with the full development process.

2. There are probably more cons than pros if you get it wrong.

3. Town planners, surveyors, civil engineers, the list goes on.

I would go see a town planner that is experience in that area, try and get a referral or speak to a developer in the area and see which consultants they use.