Duplex Build Costs in Sydney’s Eastern Suburbs

Fri, 07 Nov 2025 03:55:00 +0000

If you’re weighing up a duplex project in Bondi, Randwick, Coogee or Paddington, the question that matters most is simple: what does it actually cost, from idea to handover? There’s no one number, but there is a reliable way to frame it—site, approvals, design, construction, upgrades and contingency. I’ll lay out the moving parts below, using ballpark ranges and the on-the-ground realities I see in the East. To ground the budget talk, start by scoping the cost to build a duplex so you can map inclusions, provisional sums and likely site allowances before you commit.