Building in Gymea: Knockdown Rebuild, Granny Flat & Duplex Guide
Sutherland Shire Council (NSW) · Indicative rules and costs for homeowners · 中文报告同样支持
Min lot (KDR)
550㎡
Max height
9m
Setbacks (front/side)
7.5m / 0.9m
DA timeline
16–32 wks
Fast-track CDC
Often available
Build cost
$2500–$3800/㎡
📊 Indicative ranges from council planning controls and recent market data — not quotes, and individual blocks vary.
Significant bushfire overlay. BAL assessment required in many areas. Beautiful area = high build quality expected.
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Get my free feasibility report →Frequently asked questions — Gymea
Can I knock down and rebuild in Gymea?
Generally yes — Sutherland Shire Council requires a minimum lot of around 550㎡ for a standard knockdown rebuild, with a maximum building height of 9m. Fast-track CDC approval is available for fully compliant designs.
How long does council approval take in Gymea?
A DA through Sutherland Shire Council typically takes 16–32 weeks in practice. A compliant CDC pathway is usually around 2–4 weeks instead.
How much does it cost to build in Gymea?
Typical build costs around Gymea run $2,500–$3,800 per square metre of floor area, plus demolition of roughly $20,000–$34,000. These are indicative ranges, not quotes.
Can I build a granny flat in Gymea?
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 Gymea?
For the Sutherland Shire Council area: heritage risk is low, flood risk is low, bushfire risk is high. Significant bushfire overlay. BAL assessment required in many areas. Beautiful area = high build quality expected.
Nearby areas under Sutherland Shire Council
This page provides general guidance for the Sutherland Shire 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.