How much could your block actually yield as a duplex?
A 60-second feasibility check for investors and developers. Tell us your suburb and lot size — we'll estimate maximum buildable area, indicative DA pathway, and whether your block stacks up financially before you spend a cent on plans.
Built by 10-year Sydney development veterans. No email needed to see your initial result. Optional written report if you want it.
Why this matters
A bad duplex feasibility costs investors $20k+ in wasted plans and months of holding costs on a block that was never going to stack up. Two factors decide whether your block is duplex-suitable: zoning rules (R2 in many councils excludes dual-occupancy entirely; R3 generally allows it) and physical constraints (lot size, frontage, FSR, setbacks).
We've checked thousands of Sydney blocks against these rules. This calculator runs the same first-pass logic our engineers use.
60 seconds. Indicative only.
What's your block size?
- 100% council approval rate
- 10+ years in Sydney
- Design + engineering + approval, in-house
- Fixed-fee quotes
Get a free site visit this week.
A 30-minute walk-through with one of our designers. No charge, no obligation. You'll leave knowing exactly what's possible on your block, what it'll cost, and how long it'll take.
Sydney metro only. Site visits typically available within 5 business days.