Building in Sydenham: Knockdown Rebuild, Granny Flat & Duplex Guide
Inner West Council (NSW) · Indicative rules and costs for homeowners · 中文报告同样支持
Min lot (KDR)
600㎡
Max height
8.5m
Setbacks (front/side)
6m / 1.2m
DA timeline
24–52 wks
Fast-track CDC
Usually DA only
Build cost
$2800–$4500/㎡
📊 Indicative ranges from council planning controls and recent market data — not quotes, and individual blocks vary.
Extensive heritage conservation areas. Nearly all KDR requires DA + Heritage impact statement.
What can YOUR block in Sydenham 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 — Sydenham
Can I knock down and rebuild in Sydenham?
Generally yes — Inner West Council requires a minimum lot of around 600㎡ for a standard knockdown rebuild, with a maximum building height of 8.5m. Most projects need a full DA (development application).
How long does council approval take in Sydenham?
A DA through Inner West Council typically takes 24–52 weeks in practice.
How much does it cost to build in Sydenham?
Typical build costs around Sydenham run $2,800–$4,500 per square metre of floor area, plus demolition of roughly $22,000–$38,000. These are indicative ranges, not quotes.
Can I build a granny flat in Sydenham?
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 Sydenham?
For the Inner West Council area: heritage risk is high, flood risk is low, bushfire risk is low. Extensive heritage conservation areas. Nearly all KDR requires DA + Heritage impact statement.
Nearby areas under Inner West Council
This page provides general guidance for the Inner West 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.