Duplex vs Manor House: Which Makes More Money in Western Sydney?

If you own a 600-700sqm block in Western Sydney — or you are looking to buy one — this is the question that matters most right now.

Do you build a duplex and sell two premium dwellings? Or do you take advantage of the 2025 planning reforms and build a manor house with three or four dwellings instead?

Both are viable. Both are being done right now in Blacktown and Cumberland. But they are not equal — and understanding the difference before you commit could mean the difference between a $300,000 profit and an $800,000 profit on the same piece of land.

Here is the honest breakdown.