NSW Fence Regulations Guide
Fence Height Limits, Council Approval, Pool Fencing Rules & Dividing Fence Laws for NSW Homeowners
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You've got the quote, you've picked the colour, and you're ready to start — then someone mentions council approval and suddenly you're not sure whether you need it. Your neighbour says their fence didn't need approval. Your brother-in-law says you definitely need a DA. Google gives you fourteen different answers. Here's the actual truth.
Building a fence in NSW? Before you start, you need to understand the regulations. Getting it wrong can mean fines, forced removal, or disputes with neighbours that drag on for years. This guide explains NSW fence regulations in plain English — what you can build without approval, when you need council permission, pool fencing requirements, and how to handle dividing fences with neighbours.
Quick Summary: NSW Fence Rules
| Situation | Rule |
|---|---|
| Side/rear boundary fence | Max 1.8m height (exempt development) |
| Front fence (street boundary) | Max 1.2m height |
| Masonry (brick) fence | Max 1.2m height |
| Pool fence | Min 1.2m height, must comply with AS1926.1 |
| Fence on slope | Max 2.2m at any point |
When You DON'T Need Council Approval
Most residential fences are "exempt development" — meaning you can build them without asking council. To qualify:
Side and Rear Boundaries
- Maximum height 1.8 metres
- No electrical fencing or barbed wire
- Made from appropriate materials
Front Boundaries (facing the road)
- Maximum height 1.2 metres
- If over 400mm, must be at least 20% transparent
- No solid posts wider than 350mm
Other Requirements
- Must be structurally adequate
- Must comply with Building Code of Australia
- Must not obstruct sight lines for traffic
- Cannot affect heritage items or conservation areas
If your fence meets these requirements, you don't need approval — just build it.
When You DO Need Council Approval
You'll need a Development Application (DA) if:
- Height exceeds limits — Over 1.8m for side/rear, over 1.2m for front
- Masonry construction — Brick or stone fences over 1.2m
- Heritage areas — Properties in heritage conservation zones (common in Killara, Pymble, parts of Gordon)
- Pool fencing — Must comply with Swimming Pools Act (separate certification)
- Retaining walls — Combined fence/wall height over 2.2m
- Business/industrial zones — Different rules apply
Pro Tip: Check your local council's specific requirements. Ku-ring-gai Council has additional rules beyond state regulations, particularly for heritage areas.
Fence Height Rules Explained
Standard Height Limits
| Location | Maximum Height |
|---|---|
| Side boundary | 1.8m |
| Rear boundary | 1.8m |
| Front boundary (road) | 1.2m |
| Secondary road (corner blocks) | 1.2m with 20% transparency |
Sloping Sites
On sloping ground — common across Wahroonga, St Ives, Mosman — fences can be:
- Stepped: Horizontal tops with steps following the slope
- Raked: Panels angled to follow the slope
Maximum height at any point: 2.2m from ground level
Measuring Height
Height is measured from the finished ground level on the outside of the fence — not from your side if the ground is lower. This trips up a lot of people on sloping blocks.
Where We Work – North Shore Suburbs
We proudly service all suburbs across the North Shore — including Mosman, Gordon, Hornsby, and St Ives.
Pool Fencing Requirements
Pool fencing in NSW is governed by the Swimming Pools Act 1992 and must comply with Australian Standard AS1926.1. This is non-negotiable — children's safety is at stake.
Mandatory Requirements
- Minimum height: 1.2 metres
- Maximum gap: Less than 100mm (so children can't squeeze through)
- Non-climbable zone: 900mm clear zone outside the fence (no footholds)
- Gate operation: Self-closing from any position, self-latching at 1.5m+ height
- Gate swing: Must open outward from the pool area
Who Needs Pool Fencing?
Any pool or spa capable of holding 300mm or more of water. Very few exemptions exist. If you have a pool, you almost certainly need compliant fencing.
Certificate of Compliance
All NSW pools require a valid certificate. This is mandatory for:
- Selling a property with a pool (settlement can't proceed without it)
- Leasing a property with a pool (legal requirement)
- New pool installations
Our compliant installations support your certification application.
Dividing Fence Rules
When your fence sits on the boundary between two properties, the Dividing Fences Act 1991 applies.
Cost Sharing
Neighbours must share the cost of a "sufficient dividing fence" equally. This applies to:
- New fence construction
- Replacement of existing fences
- Repairs and maintenance
What's a "Sufficient" Fence?
A sufficient fence is one that's adequate for the purposes it serves, considering:
- The existing dividing fence (if any)
- Local council requirements
- The uses of the adjoining lands
Fencing Notice Process
- Issue a Fencing Notice to your neighbour (written notice of proposed work)
- Wait for response (minimum 1 month if no agreement)
- Reach agreement on fence type, cost sharing, and timeline
- Document the agreement in writing
What If You Can't Agree?
If neighbours can't agree:
- Try mediation (Community Justice Centres offer free mediation)
- Apply to NCAT (NSW Civil and Administrative Tribunal) for a Fencing Order
- NCAT will determine the fence type and cost allocation
We've seen plenty of neighbour disputes over fencing. The Fencing Notice process exists for a reason — follow it.
Local Council Variations
While state regulations set the baseline, individual councils may have additional requirements:
- Height restrictions in specific zones
- Material restrictions (some areas prohibit certain materials)
- Colour requirements (low-reflectivity colours near roads)
- Heritage area rules (specific styles or materials required)
- Bushfire zone requirements (non-combustible materials)
Always check with your local council before building.
North Shore Councils
- Ku-ring-gai Council: 02 9424 0000 (stricter heritage requirements)
- Willoughby Council: 02 9777 1000
- Lane Cove Council: 02 9911 3555
- North Sydney Council: 02 9936 8100
- Mosman Council: 02 9978 4000
- Hornsby Council: 02 9847 6666
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Frequently Asked Questions
Q: Do I need a permit to replace an existing fence?
A: Generally no, if the replacement meets exempt development standards. If you're changing height, location, or using materials that require approval, you may need a DA.
Q: Can my neighbour build a fence without my permission?
A: Yes, but if it's a dividing fence, they should issue you a Fencing Notice first. They can proceed after one month even without your agreement, but you'll share the cost of a "sufficient" fence.
Q: What if I want a higher fence for privacy?
A: You'll need council approval for fences over 1.8m (side/rear) or 1.2m (front). Some councils are more flexible than others. We can advise on your specific situation.
Q: Who owns the fence on the boundary?
A: A fence on the exact boundary is jointly owned by both neighbours. Both are responsible for maintenance and share costs equally.
Q: Can I build right up to my boundary?
A: Yes, for standard fencing. You're entitled to build on your boundary line. If unsure of the exact boundary, a licensed surveyor can mark it.
Need Advice on Your Fencing Project?
Navigating fence regulations can be confusing. We're happy to advise on what's possible for your specific property — no obligation.
Call Joseph to discuss your fencing project. We'll help you understand what approvals (if any) you need and ensure your fence complies with all requirements.
Over 20 years of experience with NSW fence regulations across the North Shore.
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