Granny Flat Setback Requirements in NSW
Setback requirements determine where on your block the granny flat can sit. Getting them right is essential for CDC eligibility. Buildana (Lic. 487805C) navigates setback rules across all Western Sydney councils.
Standard CDC Setbacks
Front: behind the building line of the principal dwelling Side: 0.9m minimum from side boundaries Rear: 3m minimum from rear boundary From main house (detached): 3m minimum
On a typical 450 sqm block (15m × 30m), the rear portion has approximately 12m × 13m = 156 sqm after setbacks. A 60 sqm granny flat (10m × 6m) fits comfortably.
Common Issues and Solutions
Sewer easement: position granny flat beside the easement, not over it. Existing pool: relocate granny flat to other side of yard, or remove old pool. Protected trees: arborist assessment ($500–$1,000) to determine if removable. Narrow block: consider attached granny flat (built onto rear of main house) to eliminate setback between buildings.
Buildana checks all setback constraints at the free site assessment. Contact us. For the complete building guide, see our comprehensive granny flat guide.
