Feasibility · Updated July 2026

Before Investing in a Sydney Duplex Development: Seven Questions to Ask

A strong duplex opportunity is created before purchase, not after. Investors should test the site, planning pathway and market evidence before committing capital.

1. What planning pathway is realistically available?
2. Does the site support the proposed dwelling mix, parking, landscaping and private open space?
3. Are there constraints from trees, slope, access, easements or neighbouring context?
4. What comparable sales support the finished product?
5. How sensitive is the feasibility to construction cost escalation?
6. What approval, holding and exit timing assumptions are being used?
7. Which professionals will verify legal, tax, planning, QS and construction inputs?

The answer to each question should be documented. If a return depends on optimistic assumptions across all seven, the risk is usually being underpriced.

This note is general information only and is not investment advice.