Building in Greystanes: Knockdown Rebuild, Granny Flat & Duplex Guide
Cumberland Council (NSW) · Indicative rules and costs for homeowners · 中文报告同样支持
Min lot (KDR)
400㎡
Max height
8.5m
Setbacks (front/side)
4.5m / 0.9m
DA timeline
12–24 wks
Fast-track CDC
Often available
Build cost
$2200–$3200/㎡
📊 Indicative ranges from council planning controls and recent market data — not quotes, and individual blocks vary.
Generally KDR-friendly. Strong demand for new builds in Merrylands, Wentworthville.
What can YOUR block in Greystanes fit?
Enter your street address and our AI checks the official cadastre (your measured lot size), zoning, heritage and flood overlays — then gives you costs, approval pathway and next steps. Free, 2 minutes, no signup. 支持中文。
Get my free feasibility report →Frequently asked questions — Greystanes
Can I knock down and rebuild in Greystanes?
Generally yes — Cumberland Council requires a minimum lot of around 400㎡ for a standard knockdown rebuild, with a maximum building height of 8.5m. Fast-track CDC approval is available for fully compliant designs.
How long does council approval take in Greystanes?
A DA through Cumberland Council typically takes 12–24 weeks in practice. A compliant CDC pathway is usually around 2–4 weeks instead.
How much does it cost to build in Greystanes?
Typical build costs around Greystanes run $2,200–$3,200 per square metre of floor area, plus demolition of roughly $16,000–$26,000. These are indicative ranges, not quotes.
Can I build a granny flat in Greystanes?
In NSW, a secondary dwelling (granny flat) of up to 60㎡ can usually be approved via fast-track CDC on lots of 450㎡ or more, subject to overlays such as heritage, flood and bushfire.
What are the main risks for building projects in Greystanes?
For the Cumberland Council area: heritage risk is medium, flood risk is low, bushfire risk is low. Generally KDR-friendly. Strong demand for new builds in Merrylands, Wentworthville.
Nearby areas under Cumberland Council
This page provides general guidance for the Cumberland Council area and is not advice about any specific property. Planning controls change — always confirm with council or run a block-specific feasibility report. © 2026 AusBuildCircle 澳洲建房圈.